Anatomy Unit Ii Lab Book Flashcards

Front 1

which fibers of the pectoralis major muscle originate on the anterior medial half of the clavicle?

Back 1

clavicular

Front 2

which fibers of the pectoralis major muscle originate primarily from the anterior surface of the sternum

Back 2

sternal

Front 3

which muscle inserts on the crest of the greater tubercle of the humerus?

Back 3

pectoralis major

Front 4

this is a very thin, broad muscle on the anterior portion of the neck and superior chest whose fibers run almost vertically from the fascia overlaying the pec major, from which it originates

Back 4

platysma

Front 5

this is a superficial vein that runs between the pec major and deltoid muscles

Back 5

cephalic vein

Front 6

the terminal portions of the upper intercostal vessels and nerves pierce which muscle?

Back 6

pectoralis major

Front 7

the clavipectoral triangle is bounded by what three structures?

Back 7

(1) medial aspect of pec minor
(2) inferior aspect of the clavicle
(3) anterior thoracic wall

Front 8

this muscle originates from the 3-5th ribs near the cartilages and inserts on the coracoid process of the scapula; is enclosed in the clavipectoral fascia

Back 8

pectoralis minor

Front 9

this artery branches of the axillary artery near the medial aspect of the pec minor; some branches supply the pectoralis major

Back 9

thoracoacromial artery

Front 10

this nerve usually pierces the pectoralis minor to reach the pec major, but it may also emerge from beneath the lateral aspect of the pec minor

Back 10

medial pectoral nerve

Front 11

this nerve emerges beneath the medial aspect of the pectoralis minor to innervate the pec major

Back 11

lateral pectoral nerve

Front 12

what are the four branches of the thoracoacromial artery?

Back 12

(1) deltoid branch
(2) pectoral branch
(3) acromial branch
(4) clavicular branch

Front 13

this muscle originates from the first rib and inserts on the undersurface of the clavicle; it is enclosed in the clavipectoral fascia

Back 13

subclavius

Front 14

what two muscles form the anterior wall of the axilla?

Back 14

pectoralis major and minor

Front 15

what three muscles form the posterior wall of the axilla?

Back 15

(1) subscapularis
(2) teres major
(3) latissimus dorsi

Front 16

what structures form the medial wall of the axilla?

Back 16

upper ribs and intercostal muscles, which are covered by the serratus anterior muscles

Front 17

what structures form the lateral wall of the axilla?

Back 17

superior, medial humerus, whcih is covered by the coracobrachialis muscle

Front 18

what is considered the apex of the axilla?

Back 18

cervicoaxillary canal

Front 19

the cervicoaxillary canal is bounded by what three structures?

Back 19

first rib, scapula, and clavicle

Front 20

what forms the base of the axilla?

Back 20

axillary fascia and skin

Front 21

what muscle is on the lateral aspect of the trunk and inserts on the upper portion of the humerus?

Back 21

latissimus dorsi

Front 22

what muscle originates from the coracoid process of the scapula and inserts on the middle of the shaft of the humerus?

Back 22

coracobrachialis

Front 23

what muscle originates from the supraglenoid tubercle of the scapula?

Back 23

long head of the biceps

Front 24

what muscle originates from the coracoid process of the scapula

Back 24

short head of the biceps

Front 25

where does the biceps brachii muscle insert on the arm?

Back 25

the radial tuberosity

Front 26

this muscle originates from the inferior angle and lateral border of the scapula and inserts on the crest of the lesser tubercle of the humerus

Back 26

teres major

Front 27

this muscle originates from the outer surface and superior border of the ribs 1-8, possibly 9 and inserts on the costal surface of the medial border of the scapula

Back 27

serratus anterior

Front 28

this muscle originates from the subscapular fossa of the scapula and inserts on the lesser tubercle of the humerus and shoulder joint capsule

Back 28

subscapularis

Front 29

this nerve runs along the medial border of the coracobrachialis; it is formed by the convergence of the lateral and medial heads from the lateral and medial cords of the brachial plexus

Back 29

median nerve

Front 30

this artery is deep to the medial head of the median nerve; its distal part runs medial to the median nerve, and is a continuation of the subclavian artery once it enters the axillary region at the lateral border of the first rib

Back 30

axillary artery

Front 31

what artery does the axillary artery become once it exits the axillary region at the lateral border of the teres major and enters the arm?

Back 31

brachial artery

Front 32

this vein is located medial and anterior to the axillary artery

Back 32

axillary vein

Front 33

this nerve runs medial tot he axillary artery and is most likely deep to the axillary vein

Back 33

ulnar nerve

Front 34

these nerves both run medial tot he axillary artery, in close proximity to the axillary vein, in the skin of the forearm and upper arm, respectively; both of these nerves are direct branches from the medial cord of the brachial plexus

Back 34

medial antebrachial cutaneous and medial brachial cutaneous nerves

Front 35

this nerve runs from the second intercostal space and medial aspect of the arm, and is the lateral cutaneous branch of the second intercostal nerve

Back 35

intercostobrachial nerve

Front 36

this nerve lies lateral to the median nerve; it enteres the muscle belly of the coracobrachialis, and after innervating this and the biceps, continues as the lateral antebrachial cutaneous nerve

Back 36

musculocutaneous nerve

Front 37

this nerve is the other terminal branch of the posterior cord of the brachial plexus that travels with the posterior humeral circumflex artery

Back 37

axillary nerve

Front 38

this nerve supplies the subscapularis muscle

Back 38

upper subscapular

Front 39

this nerve supplies the subscapularis and teres major muscles

Back 39

lower subscapular nerve

Front 40

this nerve supplies the latissimus dorsi

Back 40

thoracodorsal nerve

Front 41

this nerve runs from the axilla to the serratus anterior; originates from the ventral rami of spinal nerves C5-C7

Back 41

long thoracic nerve

Front 42

this part of the axillary artery lies medial to the pectoralis minor

Back 42

1st

Front 43

this part of the axillary artery lies posterior or deep to the pectoralis minor

Back 43

2nd

Front 44

this part of the axillary artery lies lateral to the pectoralis minor

Back 44

3rd

Front 45

this branch of the first part of the axillary artery goes to the upper thoracic wall

Back 45

supreme thoracic artery

Front 46

this branch of the second part of the axillary artery almost immediatley branches into its four branches

Back 46

thoracoacromial artery

Front 47

this branch of the second part of the axillary artery runs deep to the pectoralis minor, goes to the lateral thoracic wall, pectoral musces, and breast; runs near the long thoracic nere

Back 47

lateral thoracic artery

Front 48

this branch of the third part of the axillary artery runs near the posterior wall of the axilla and very quickly branches into the thoracodorsal and scapular circumflex arteries

Back 48

subscapular artery

Front 49

this branch of the subscapular artery (which is a branch of the 3rd part of the axillary artery) travels with the thoracodorsal nerve to the latissimus dorsi muscle

Back 49

thoracodorsal artery

Front 50

this branch of the subscapular artery (which is a branch of the 3rd part of the axillary artery) passes posteriorly into the triangular space between subscapularis and teres major to contribute to the scapular anastomosis

Back 50

scapular circumflex artery

Front 51

this branch of the 3rd part of the axillary artery is a small branch that travels across the front of the arm behind the coracobrachialis; it may arise from the common trunk with the posterior humeral circumflex artery or as a separate branch off the axillary artery

Back 51

anterior humeral circumflex

Front 52

this branch off the 3rd part of the axillary artery is a larger branch which ravels through the quadrangular space between the subscapularis and teres major muscles and exits posteriorly; travels with the axillary nerve

Back 52

posterior humeral circumflex

Front 53

this vein arises from the lateral aspect of the venous arch on the dorsum of the hand and ravel sup the lateral wrist, anterolateral forearm and elbow, and lateral arm; it goes between the pec major and deltoid where it then pierces the clavipectoral fascia and enters the axillary vein

Back 53

cephalic vein

Front 54

which vein does the cephalic vein empty into?

Back 54

axillary vein

Front 55

this vein arises from the medial aspect of the venous arch on the dorsum of the hand and travels up the medial wrist, forearm, elbow, and arm; at the middle of the arm, it pierces the deep fascia where it joins with the deep veins that run with the brachial artery

Back 55

basilic vein

Front 56

this vein crosses in front of the elbow connecting the cephalic and basilic veins; lies immediately anterior to the bicipital aponeurosis

Back 56

median cubital vein

Front 57

this nerve of the arm pierces the deep fascia medial to the basilic vein in the medial aspect of the arm; it descends medially down the arm; proximal to the elbow, it wraps posteriorly and innervates the skin over the olecranon process

Back 57

medial cutaneous nerve of the arm

Front 58

this nerve pierces the deep fascia lateral to the basilic vein and more distally than the medial cutaneous nerve of the arm; it splits into two branches that supply the skin over the medial aspect of the forearm, anteriorly and posteriorly

Back 58

medial cutaneous nerve of the forearm

Front 59

this nerve pierces the deep fascia on the lateral aspect of the arm near the cephalic vein, just proximal to the elbow; it supplies the skin on the lateral side of the forearm and is a continuation of the musculocutaneous nerve

Back 59

lateral cutaneous nerve of the forearm

Front 60

the lateral cutaneous nerve of the forearm is a continuation of what larger nerve?

Back 60

musculocutaneous nerve

Front 61

this portion of the deltoid muscle originates ont he acromion and lateral portion of the clavicle and inserts with the other portions on the deltoid tuberosity of the humerus

Back 61

anterior

Front 62

this muscle originates from the 3-5th ribs near the cartilages and inserts on the coracoid process of the scapula

Back 62

pectoralis minor

Front 63

this head of the biceps originates from the supraglenoid tubercle of the scapula

Back 63

long head

Front 64

this head of the biceps originates from the coracoid process of the scapula

Back 64

short head

Front 65

this muscle originates from the coracoid process of the scapula and inserts on the middle of the shaft of the humerus

Back 65

coracobrachialis

Front 66

this ligament travels from the lesser to greater tubercle of the humerus, over the tendon of the long head of the biceps situated in the intertubercular sulcus

Back 66

transverse ligament

Front 67

this structures crosses the anterior aspect of the elbow diagonally, traveling from the distal portion of the biceps brachii muscle belly to the deep fascia on the proximal medial forearm

Back 67

bicipital aponeurosis

Front 68

this nerve innervates the coracobrachialis; it runs between the biceps brachii and brachialis (and innervates those) in the lateral aspect of the arm, and continues into the forearm as the lateral antebrachial cutaneous nerve

Back 68

musculocutaneous nerve

Front 69

this artery is a continuation of the axillary artery at the lateral border of the teres major

Back 69

brachial artery

Front 70

this branch of the brachial artery is the first large named branch off the medial side; it dives posteriorly between the medial and long heads of the triceps and travels with the radial nerve in the posterior aspect of the arm

Back 70

profunda brachii

Front 71

this artery branches off the brachial artery near the middle of the arm and then travels with the ulnar nerve on the surface of the medial head of the triceps to the elbow; anstomoses with posterior ulnar recurrent and inferior ulnar collateral

Back 71

superior ulnar collateral

Front 72

this artery braches off the brachial artery just proximal to the elbow and travels on the brachialis muscle; anstomoses with the anterior ulnar recurrent and superior ulnar collateral

Back 72

inferior ulnar collateral

Front 73

these are the two terminal branches of the brachial artery at the elbow

Back 73

radial and ulnar arteries

Front 74

this artery travels distally and laterally over the insertion of the biceps brachii tendon and is a branch of the brachial artery

Back 74

radial artery

Front 75

this branch of the brachial artery travels distally and medially under the pronator teres

Back 75

ulnar artery

Front 76

what is the base of the cubital fossa?

Back 76

line between the medial and lateral humeral epicondyles

Front 77

what muscle forms the medial side of the cubital fossa?

Back 77

pronator teres

Front 78

what muscle forms the lateral side of the cubital fossa?

Back 78

brachioradialis

Front 79

what two muscles form the floor of the cubital fossa?

Back 79

brachialis proximally, supinator distally

Front 80

what two structures form the roof of the cubital fossa?

Back 80

skin and fascia

Front 81

this nerve enters the lateral aspect of the arm and forearm just superior to the lateral elbow between the brachialis and brachioradialis muscles

Back 81

radial nerve

Front 82

this artery is a branch of the deep artery of the arm; it runs with the radial nerve and anostomoses with the radial recurrent artery around the elbow

Back 82

radial collateral artery

Front 83

this branch of the radial nerve travels under the brachioradialis with the radial artery and becomes more superficial at the lateral aspect of the wrist traveling ot the dorsum of the hand; cutaneous in function

Back 83

superficial radial nerve

Front 84

this branch of the radial nerve disappears from view almost immediately into the supinator as it branches off

Back 84

deep radial nerve (posterior interosseous)

Front 85

this artery branches off near the origin of the radial artery and travels proximally to anastomose with the radial collateral artery at the elbow

Back 85

radial recurrent artery

Front 86

this nerve travels with the brachial artery at the distal lateral aspect of the arm; it splits into the pronator teres muscle in two heads

Back 86

median nerve

Front 87

this artery branches off the ulnar artery in the cubital fossa and anastomoses with the inferior ulnar collateral artery

Back 87

anterior ulnar recurrent artery

Front 88

this artery branches off the ulnar artery in the cubital fossa and anastomoses with the superior ulnar collateral artery

Back 88

posterior ulnar recurrent artery

Front 89

this structure is a thickening of the deep fascia of the palm

Back 89

palmar aponeurosis

Front 90

this muscle lies in the superficial fascia over the ulnar side of the hand near the pisiform attaching to the palmar aponeurosis

Back 90

palmaris brevis

Front 91

which humeral epicondyle does the ulnar nerve travel behind?

Back 91

medial

Front 92

this ligament extends from the styloid process of the radius to the styloid process of the ulna; it is a thickening of the deep antebrachial fascia and is continuous with the extensor retinaculum on the posterior aspect of the wrist

Back 92

palmar carpal ligament

Front 93

this structure runs from the scaphoid and trapezium to the pisiform and hook of the hamate

Back 93

flexor retinaculum (transverse carpal ligament)

Front 94

what is the only muscle located in the second layer of the forearm?

Back 94

flexor digitorum superficialis

Front 95

what two structures pass beneath the fibrous arch of the flexor digitorum superficialis formed between the radial and ulnar/humeral origins?

Back 95

median nerve and ulnar artery

Front 96

this artery travels deep to the brachioradialis muscle belly in the proximal forearm and medial to the brachioradialis tendon in the distal forearm; just proximal to the wrist, it travels around to the dorsum of the wrist

Back 96

radial artery

Front 97

this branch of the radial artery is a small branch off of it at the wrist; travels deep to the flexor tendons and anastomoses with the palmar carpal branch of the ulnar artery

Back 97

palmar carpal branch

Front 98

as the radial artery begins to travel dorsally at the wrist, it gives off this branch, which runs over the flexor retinaculum and eventually contributes to the superficial palmar arterial arch

Back 98

superficial palmar branch

Front 99

this artery in the proximal forearm is covered by the muscles of the superficial layer of the anterior forearm and the FDS; it runs medially over the muscle belly of the FDP, where it is corssed by the median nerve, and then medial to the flexor tendons; in the distal forearm it travels with the ulnar nere over the flexor retinaculum through Guyon's canal

Back 99

ulnar artery

Front 100

this artery branches laterally off the ulnar artery just distal to the cubital fossa and divides quickly into two branches

Back 100

common interosseous artery

Front 101

this branch of the common interosseous artery travels immediately posterior between the proximal radius and ulna

Back 101

posterior interousseous artery

Front 102

this artery branches off the posterior interosseous artery and travels proximally

Back 102

recurrent interosseous artery

Front 103

this branch of the common interosseous artery travels distally beneath and between the FPL and FDP muscles along hte anterior aspect of the interosseous membrane, running with the anterior interosseous nerve; passes deep to pronator quadratus

Back 103

anterior interosseous artery

Front 104

what muscle does the anterior interosseous artery pass deep to?

Back 104

pronator quadratus

Front 105

this branch of the ulnar artery arises proximal to the flexor retinaculum and contributes to the anastomosis at the wrist

Back 105

dorsal carpal branch

Front 106

this nerve, from the cubital fossa, travels deep to the FDS; lies deep to the palmaris longus in the distal forearm and wrist, and passes deep to the flexor retinaculum

Back 106

median nerve

Front 107

this nerve branches off the anterior interosseous nerve and travels with the anterior interosseous artery along the anterior aspect of the interosseous membrane and passes deep to the pronator quadratus

Back 107

anterior interosseous nerve

Front 108

this nerve branches off the median nerve just proximal to the flexor retinaculum and then travels superficial to the retinaculum into the palm of the hand (innervates skin on the lateral half of the palm)

Back 108

palmar cutaneous branch of the median nerve

Front 109

this nerve travels deep to the flexor carpi ulnaris muscle belly in the proximal forearm and just lateral to the flexor carpi ulnaris tendon in the distal forearm; it travels superficial to the flexor retinaculum with the ulnar artery

Back 109

ulnar nerve

Front 110

this nerve branches off the ulnar nerve in the distal forearm and travels toward the skin over the dorsum of the hand on the ulnar side

Back 110

dorsal cutaneous branch

Front 111

this nerve branches off the ulnar nerve in the distal forearm, crosses in front of the ulnar artery, and goes to the skin on the medial half of the palm

Back 111

palmar cutaneous branch of the ulnar nerve

Front 112

what are the boundaries of the carpal tunnel?

Back 112

carpal bones and flexor retinaculum

Front 113

what are the contents of the carpal tunnel?

Back 113

(1) median nerve
(2) tendons of the flexor digitorum superficialis
(3) tendons of the flexor digitorum profundus
(4) tendon of the flexor pollicis longus

Front 114

this branch of the ulnar nerve branches off and travels near the deep palmar branch of the ulnar artery, passing between the abductor and flexor digiti minimi

Back 114

deep branch of the ulnar nerve

Front 115

this branch of the ulnar nerve divides into three palmar digital branches to innervate the skin of the 4th and 5th digits

Back 115

superficial branch of the ulnar nerve

Front 116

these ligaments are fibrous bands that wrap horizontally across the phalanges

Back 116

annular ligaments

Front 117

these ligaments are fibrous brands that appear to make an X and cross in front of the joints

Back 117

cruciate ligaments

Front 118

these are the blood supply to the fingers that run between the tendons and phalanges

Back 118

vincula

Front 119

this head of the flexor pollicis brevis originates from the flexor retinaculum and trapezium bone

Back 119

superficial head

Front 120

this head of the flexor pollicis brevis originates fom the trapezoid and capitate bones

Back 120

deep head

Front 121

this head of the adductor pollicis originates from the capitate and bases of the 2nd and 3rd metacarpals'; inserts into the extensor expansion on the thumb

Back 121

oblique head

Front 122

this head of the adductor pollicis originates from the palmar surface of the 3rd metacarpal; inserts into the ulnar side of the base of the proximal phalanx of the thumb

Back 122

transverse head

Front 123

inferior and lateral to the external occipital protuberance, which two structures pierce the upper trapezius muscle?

Back 123

occipital artery and greater occipital nerve

Front 124

this artery lies lateral to the greater occipital nerve

Back 124

occipital artery

Front 125

this nerve is a fairly large nerve medial to the occipital artery; it is the dorsal ramus of C2 and runs superiorly to the back of the head

Back 125

greater occipital nerve

Front 126

these two nerves travel through the posterior triangle of the neck and innervate the trapezius muscle

Back 126

spinal accessory nerve
anterior primary rami of C3 and C4

Front 127

this branch of the transverse cervical artery travels with the spinal accessory nerve to supply the trapezius

Back 127

superficial (ascending) branch

Front 128

this nerve runs with the deep branch of the transverse cercical artery beneath the rhomboids, and innervates the rhomboids and levator scapulae

Back 128

dorsal scapular nerve

Front 129

this muscle originates from the ligamentum nuchae and spinous processes of C7-T3, and inserts on ribs 2-5; lies deep to the rhomboids and has a similar muscle fiber direction as the rhomboids

Back 129

serratus posterior superior

Front 130

this muscle originates from the spinous processes of T11-L3 and inserts on ribs 9-12; lies deep to the latissimus dorsi

Back 130

serratus posterior inferior

Front 131

this portion of the deltoid originates from the lateral margin and superior surface of the acromion

Back 131

middle

Front 132

this portion of hte deltoid originates from the inferior lip of the posterior border of the spine of the scapula

Back 132

posterior

Front 133

this head of the triceps brachii originates on the infraglenoid tubercle of the scapula

Back 133

long head

Front 134

this bursa lies between the acromion and the insertion of the supraspinatus on the humerus, and then extends laterally between the deltoid and the humerus/shoulder joint capsule

Back 134

subacromial/subdeltoid bursa

Front 135

this ligament extends from the coracoid process to the acromion

Back 135

coracoacromial ligament

Front 136

this ligament runs over the suprascapular notch, creating a foramen through which the suprascapular nerve travels

Back 136

superior transverse scapular ligament

Front 137

this nerve travels underneath the superior transverse scapular ligament

Back 137

suprascapular nerve

Front 138

this artery travels above the superior transverse scapular ligament

Back 138

suprascapular artery

Front 139

what are the four boundaries of the quadrangular space?

Back 139

(1) teres minor
(2) teres major
(3) long head of the triceps
(4) humerus

Front 140

what are the two contents of the quadrangular space?

Back 140

(1) axillary nerve
(2) posterior humeral circumflex artery

Front 141

what are the three boundaries of the triangular space?

Back 141

(1) teres minor
(2) teres major
(3) long head of the triceps

Front 142

what is the content of the triangular space?

Back 142

scapular circumflex artery

Front 143

this artery comes through the triangular space to anastomose with the suprascapular artery

Back 143

scapular circumflex artery

Front 144

this nerve is a branch of the axillary nerve; it pierces the fascia at the inferior border of the posterior deltoid and covers the lower half of the posterior deltoid

Back 144

superior lateral cutaneous nerve of the arm

Front 145

this nerve is a branch of the radial nerve; it pierces the fascia inferior and medial to the inferior border of the posterior deltoid and supplies the skin over the posterior medial arm just inferior to the deltoid

Back 145

posterior cutaneous nerve of the arm

Front 146

this nerve pierces the fascia in the middle of the posterior aspect of the arm and supplies the skin over the posterior lateral arm; is a branch of the radial nerve

Back 146

inferior lateral brachial cutaneous nerve

Front 147

this nerve pierces the fascia on the posterior lateral aspect of the arm just above the elbow and descends down the posterior lateral forearm; is a branch of the radial nerve

Back 147

posterior cutaneous nerve of the forearm

Front 148

this nerve comes off the medial cord of the brahcial plexus; wraps around the posterior aspect of the arm inferior to the posterior cutaneous nerve of the arm

Back 148

medial cutaneous nerve of the forearm

Front 149

this nerve pierces the deep fasica on the lateral aspect of the arm, just proximal to the elbow; it supplies the skin on the lateral aspect of the forearm and is a continuation of the musculocutaneous nerve

Back 149

lateral cutaneous nerve of the forearm

Front 150

this head of the triceps brachii originates from the lateral and posterior surface of the proximal humerus and the lateral intermuscular septum

Back 150

lateral head

Front 151

this head of the triceps brachii originates from the medial and posterior surface of the distal humerus and the medial intermuscular septum; lies deep to the other two heads

Back 151

medial head

Front 152

this muscle originates from the posterior surface of the lateral epicondyle of the humerus and inserts on the lateral side of the olecranon process and antebrachial fascia; lies just inferior and lateral to the insertion of the biceps brachii

Back 152

anconeus

Front 153

this is a thick fibrous band across the posterior aspect of the wrist from the distal radius to the styloid process of the ulna, triquetrum, and pisiform

Back 153

extensor retinaculum

Front 154

how many extensor compartments are there at the wrist?

Back 154

6

Front 155

what two muscle tendons go through the first extensor compartment of the wrist?

Back 155

abductor pollicis longus and extensor pollicis brevis

Front 156

what two muscle tendons go through the second extensor compartment of the wrist?

Back 156

extensor carpi radialis longus and brevis

Front 157

what muscle tendon goes through the third extensor compartment of the wrist?

Back 157

extensor pollicis longus

Front 158

what two muscle tendons go through the fourth extensor compartment of the wrist?

Back 158

extensor digitorum and extensor indicis

Front 159

what muscle tendon goes through the fifth extensor compartment of the wrist?

Back 159

extensor digiti minimi

Front 160

what muscle tendon goes through the sixth extensor compartment of the wrist?

Back 160

extensor carpi ulnaris

Front 161

these connections are between the extensor digitorum tendons just proximal to the MCP joints

Back 161

intertendinous connections

Front 162

this mechanism lies on the dorsal surface of digits 2-5 near the MCP joint

Back 162

extensor hood/mechanism

Front 163

this part of the extensor mechanism maintains the aligment of the extensor digitorum tendon centrally over the head of the metacarpal; it also serves as a sling, which moves proximally and distally during finger flexion and extension, facilitating the mechanical advantage of the muscels that attach to it

Back 163

sagittal band

Front 164

this part of the extensor mechanism inserts into the base of the middle phalanx; extensor digitorum, interossei, and lumbricales contribute to this (as well as extensor indicis and extensor digiti minimi on their respective fingers)

Back 164

central slip

Front 165

this aprt of the extensor mechanism is contributed to by the extensor digitorum, interossei, and lumbricales (as well as indicis and digiti minimi); normally they are dorsal to the axis of motion for the finger flexion and extension at both the PIP and DIP joints

Back 165

lateral bands

Front 166

the extensor digitorum, interossei, and lumbricales (as well as indicis and digiti minimi) contribute to this part of the extensor mechanism; this is the lateral bands coming together and inserting on the base of the dorsal distal phalanx

Back 166

terminal tendon

Front 167

this ligament of the AC joint helps prevent overriding of the clavicle on the acromion

Back 167

acromioclavicular ligament

Front 168

this ligament of the AC joint causes rotation of the clavicle during elevation of the arm via its attachments; it prevents medial displacement of the scapula on the clavicle and resists independent A/P motion of the clavicle or scapula. Limits scapular abduction and provides stability to the joint

Back 168

coracoclavicular ligament

Front 169

this ligament of the SC joint unifies the ends of both clavicles and prevents excessive elevation of the medial end of the clavicle when the lateral end of the clavicle is depressed

Back 169

interclavicular ligament

Front 170

this ligament of the SC joint gives stability to it; it stabilizes the clavicle against the pull of the muscles (SCM, upper trap, and delts); primary limiting factor in elevation of the clavicle and is taut with the arm overhead

Back 170

costoclavicular ligament

Front 171

this ligament of the SC joint checks anterior and posterior movements of the head of the clavicle

Back 171

anterior sternoclavicular ligament

Front 172

this structure in the SC joint acts as a hinge and shock absorber; it prevents dislocation of the joint and forces transmitted medially

Back 172

articular disc

Front 173

this ligament of the GH joint limits lateral rotation below 60º of abduction and limits inferior glide of the head of the humerus

Back 173

coracohumeral

Front 174

this ligament of the GH joint converts the intertubercular sulcus into a canal and holds the long head of the biceps in this canal (bicipital groove)

Back 174

transverse ligament

Front 175

this portion of the anterior GH ligament limits shoulder lateral rotation with the arm adducted

Back 175

superior

Front 176

this portion of the anterior GH ligament limits shoulder lateral rotation from 45-90º abduction

Back 176

middle

Front 177

this portion of the anterior GH ligament limits shoulder LR above 90º abduction

Back 177

inferior

Front 178

this structure of the GH joint deepens the glenoid cavity to increase stability

Back 178

labrum

Front 179

this GH ligament helps prevent upward dislocation of the humerus

Back 179

coracoacromial

Front 180

this ligament of the elbow resists varus forces

Back 180

radial collateral

Front 181

this ligament of the elbow resists valgus forces

Back 181

ulnar collateral

Front 182

this ligament of the elbow holds the head of the radius against the ulna

Back 182

annular ligament

Front 183

is the wrist capsule thicker volarly or dorsally?

Back 183

volarly

Front 184

what are the four ligaments at the wrist?

Back 184

(1) anterior [palmar] radioulnar
(2) posterior [dorsal] radioulnar
(3) radial collateral
(4) ulnar collateral

Front 185

this complex on the side of ulnar side of the wrist cushions the ulnar side, stabilizes the ulnar carpals and distal radioulnar joint, and separates the distal radioulnar joint from the radiocarpal joint

Back 185

articular disc complex

Front 186

these ligaments of the hand remain taut throughout the ROM at the PIP and DIP joints;

Back 186

radial and ulnar collateral

Front 187

in what position of the MP joints of the fingers are the radial and ulnar collateral ligaments taut?

Back 187

flexion

Front 188

in what position of the MP joints of the fingers are the radial and ulnar collateral ligaments lax?

Back 188

extension

Front 189

what movements do the radial and ulnar collateral ligaments prevent in the hand?

Back 189

radial and ulnar deviation at PIP, DIP, and MP joints

Front 190

this structure of the hand prevents hyperextension of the MP, PIP, and DIP joints

Back 190

volar plate