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73 Cards in this Set

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  • Back
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what is the name for the membrane between the ulna and radius
interosseous membrane
what movement does the radioulnar joint support?
supination and pronation
which structure is responsible for holding the radial head to the ulna?
anular ligament
the radius articulates with which 2 carpal bones?
scaphoid and lunate
how does ulna articulate with carpal bones?
via articular disc
which structures are found on the sides of the wrist joint?
radial and ulnar collateral ligaments
which ligaments of the wrist are stronger, those of the dorsal or ventral side?
ventral side
is flexor compartment of forearm anterior or posterior? Extensor compartment?
anterior; posterior
if pressure in compartments of forearm causes pressure and decreases flow in blood vessels, what is the name for this syndrome?
compartment syndrome
where do the 'carpi' muscles insert? What is the exception to this? Where does it insert?
base of metacarpals; flexor carpi ulnaris which inserts onto pisiform and hammate
the digitorum muscles insert where for the most part?
onto phalanges
how many layers are present in the flexor compartment? How many muscles are present in each layer?
3 layers; 4 in superficial, 1 in intermediate, 3 in deep
how many layers are present in the extensor compartment? How many muscles are present in each layer?
2 layers; 6 in superficial, 5 in deep
by which nerve are the muscles of the flexor compartment innervated? What are the exceptions?
median nerve; flexor carpi ulnaris and medial aspect of flexor digitorum profundus which are innervated by the ulnar nerve
which two muscles of the anterior compartment are innervated by the anterior interosseous branch of the median nerve?
flexor pollicis longus and pronator quadratus
what are the 4 superficial muscles of the anterior compartment of the forearm? What is the origin for these 4 muscles?
pronator teres, flexor carpi radialis, palmaris longus, flexor carpi ulnaris; flexor forearm tendon which attaches to medial epicondyle and supracondylar ridge
None
flexor carpi ulnaris has an additional origin other than medial epicondyle of humerus. Where is this?
ulna
what is the muscle of the intermediate layer of the anterior compartment of the forearm? Where are its two origins? Its insertion?
flexor digitorum superficialis; common flexor tendon and the radius; middle phalanx of all fingers except thumb
what are the 3 muscles of the deep layer of the anterior compartment of the forearm?
pronator quadratus, flexor digitorum profundus, flexor pollicis longus
where does the flexor digitorum profundus originate? Insert?
ulna and interosseous membrane; onto distal phalanx of digits 2-5
where does the flexor pollicis longus originate? Insert?
radius and interosseous membrane; distal thumb
which 2 nerves are primarily responsible for innervating the muscles of the posterior compartment of the forearm?
radial nerve and posterior interosseous
None
which 3 muscles of the posterior compartment of the forearm are innervated by the radial nerve (before branching)?
brachioradialis, extensor carpi radialis longus, extensor carpi radialis brevis
None
the superficial layer of the posterior compartment of the forearm arises from where?
lateral epicondyle of humerus and supracondylar ridge
what are the names of the 6 superficial muscles of the extensor compartment of the forearm?
brachioradialis, extensor carpi radialis longus, extensor carpi radialis brevis, extensor digitorum, extensor digiti minimi, extensor carpi ulnaris
what are the names of the 5 deep muscles of the extensor compartment of the forearm?
abductor pollicis longus, extensor pollicis longus, extensor pollicis brevis, extensor indicis, supinator
into where does the extensor digitorum insert?
extensor hood
which of the deep muscles of the extensor compartment of the forearm originates from the common tendon?
supinator
from where do most of the muscles of the deep compartment of the forearm originate (with the exception of the supinator)?
radius and ulna
does the extensor pollicis brevis originate on the radius or ulna? The extensor pollicis longus? The abductor pollicis longus? The extensor indicis?
radius, ulna, ulna and radius, ulna
None
the radial artery runs deep to which mucles in forearm?
brachioradialis
which artery is responsible for the pulse that one can feel on the wrist?
radial artery
at the wrist, the radial arterty is located just lateral to which tendon?
flexor carpi radialis
the radial recurrent artery supplies blood to which part of the arm?
elbow
which muscle of the extensor compartment of the forearm is innervated by the DEEP branch of the radial nerve?
supinator
None
the radial nerve is accomodated by which structure on the humerus?
radial groove
which two features of the palm are formed by the radial and ulnar arteries?
superficial and deep palmar arches
which branch of the radial artery is responsible for the formation of the superficial palmar arch? The deep palmar arch?
superficial palmar branch; radial artery
what does the palmar carpal branch of the radial artery do?
supplies carpal bones with blood
what branch of the ulnar artery is responsible for the formation of the superficial palmar arch? The deep palmar arch?
ulnar artery; deep palmar branch
which vessels which come from superior palmar arch vascularize the digits? From the deep palmar arch?
common palmar digital arteries; proper palmar digital arteries
the ulnar artery branches to form what? This branch branches into which 2 arteries?
common interosseous artery; posterios and anterior interosseous arteries
from its branch at the common interosseous artery, what is the destiny of the posterior interosseous artery?
crosses the interosseous membrane and supplies blood to extensor compartment
which 2 major veins drain blood from the arm? Which is medial? Lateral? Which vein connects the 2 at the cubidal fossa?
cephalic and basilic; basilic; cephalic; median cubital
what is the name for 2 veins which sandwich an artery? What is the purpose of this?
vena committans; countercurrent heat exchange and pumping of blood
what are the 3 cutaneous nerves involved in sesation of skin around forearm and hands? From which branches of the brachial plexus does each originate?
medial antebrachial cutaneous from medial cord; lateral antebracheal cutaneous from musculocutaneous branch; posterior antebrachial cutaneous from radial branch
which nerve has as a branch the anterior interosseous nerve?
median nerve
None
which 4 muscles are innervated by the median nerve before it forms the anterior interosseous branch? Which 3 are innervated by anterior interosseous branch?
pronator teres, flexor digitorum superficialis, palmaris longus, flexor carpi radialis; pronator quadratus, flexor pollicis longus, flexor digitorum profundus
sensation for which part of arm/hand is controlled by median antebrachial cutaneous nerve?
anterior first 3.5 fingers of hand and corresponding palm, posterior first 3.5 fingers of hand up to PIP joint
the lateral cutaneous nerve innervated which part of the skin for the forearm/hand?
lateral 1/2 of forearm
where does the ulnar nerve branch in the arm?
it does not branch in the arm
what is the cutaneous innervation of the ulnar nerve?
the ulnar 1.5 fingers
which two muscles are innervated by the ulnar nerve?
flexor carpi ulnaris and flexor digitorum profundus (medial aspect)
does the ulnar nerve pass through the carpal tunnel? With which other structure does it pass into wrist?
no; ulnar artery
which compartment of the forearm is innervared by the radial nerve?
extensor
the radial nerve directly innervates which 3 muscles?
brachioradialis and extensor carpi radialis longus and brevis
None
what is the function of the brachialis?
flexor of the forearm
the deep branch of the radial nerve pierces and innervates which muscle?
supinator
after the deep radial nerve pierces the supinator, what is it called?
the posterior interosseous nerve
the axillary nerve innervates which 2 muscles?
deltoid and teres minor
the superficial radial nerve is cutaneous to which region of the hand?
radial dorsum
which three tendons are responsible for the anatomical snuffbox? Which artery is found in this structure? Which carpal bone is below?
extensor pollicis brevis and extensor pollicis longus and abductor pollicis longus; radial artery; scaphoid
what is the action of the pronator teres?
pronates and abducts forearm
what is the action of flexor carpi radialis?
flexes and abducts hand
what is the action of the flexor carpi ulnaris?
flexes and adducts hand
what is the action of the flexor digitorum superficialis?
flexes fingers at PIP
what is the action of the flexor digitorum profundus?
flexes fingers at DIP
what is the action of the flexor pollicis longus?
flexes thumb at IP
what is the action of the extensor carpi radialis longus and brevis?
extends and abducts hand
what is the action of the extensor digitorum?
extends at PIP
what is the action of the extensor digiti minimi?
extends pinky
what is the action of the extensor carpi ulnaris?
extends and adducts hand
what is the action of the supinator?
supinates forearm