Lab #9

Front 1

a connective tissue; tendious seam medial to the rectus abdominus

Back 1

trunk anterior- linea alba

Front 2

large fan-shaped muscle covering upper portion of chest

Back 2

thorax and shoulder- pectoralis major (des & def)

Front 3

prime mover of arm flexion; adducts, medially rotates arm; with arm fixed, pulls chest upward (thus also acts in forced inspiration)

Back 3

thorax and shoulder- pectoralis major
(action)

Front 4

fan-shaped muscle deep to scapula; deep and inferior to pectoral muscles on lateral rib cage

Back 4

thorax and shoulder- serratus anterior (des & def)

Front 5

moves scapula foward toward chest wall; rotates scapula, causing inferior angle to move laterally and upward; abduction and raising of arm

Back 5

thorax and shoulder- serratus anterior
(action)

Front 6

fleshy triangular muscle forming shoulder muscle mass; inferior to pectoralis major; intramuscular injection site

Back 6

thorax and shoulder- deltoid (des & def)

Front 7

acting as a whole, prime mover of arm abduction; when only specific fibers are active, can aid in flexion, extension, and rotation of humerus

Back 7

thorax and shoulder- deltoid (action)

Front 8

flat thin muscle directly beneath and obscured by pectoralis major

Back 8

thorax and shoulder- pectoralis minor (des & def)

Front 9

with ribs fixed, draws scapula foward and inferiorly, with scapula fixed, draws rib cage superiorly

Back 9

thorax and shoulder- pectoralis minor (action)

Front 10

11 pairs lie between ribs; fibers run obliquely downward and foward toward sternum

Back 10

deep thorax for respiration- external intercoastals (des & loc)

Front 11

muscle layers run obliquely and at right angles to each other

Back 11

deep thorax for respiration- external and internal intercoastals

Front 12

pulls ribs toward one another to elevate rib cage; aids in inspiration

Back 12

deep thorax for respiration- external intercoastals (des & def)

Front 13

11 pairs lie between ribs; fibers run deep and at right angles of external intercoastals

Back 13

deep thorax for respiration- internal intercoastals (des & loc)

Front 14

draws ribs together to depress rib cage; aids in forced expiration; antagonist to external intercoastals

Back 14

deep thorax for respiration- internal intercoastals (action)

Front 15

medial superficial muscle, extends from pubis to rib cage; ensheathed by aponeuroses of oblique muscle; segmented

Back 15

abdominal wall- rectus abdominis (des & def)

Front 16

most superficial lateral muscle; fibers run downward and medially; enseathed by an aponeurosis

Back 16

abdominal wall- external oblique (des & def)

Front 17

flexes and rotates vertebral column; inc abdominal pressure; fixes and depresses ribs; stabilizes pelvis during walking; used in sit ups and curls

Back 17

abdominal wall- rectus abdominus (action)

Front 18

flexes and rotates vertebral column; inc abdominal pressure; fixes and depresses ribs; stabalizes pelvis during walking; used in sit ups and curls; aids in muscles of back in trunk rotation and lateral flexion; used in oblique curls

Back 18

abdominal wall- external oblique (action)

Front 19

most fibers run at right angles to those of external oblique which it underlies

Back 19

abdominal wall- internal oblique (des & def)

Front 20

flexes and rotates vertebral column; inc abdominal pressure; fixes and depresses ribs; stabalizes pelvis during walking; used in sit ups and curls; aids in muscles of back in trunk rotation and lateral flexion; used in oblique curls

Back 20

abdominal wall- internal oblique (action)

Front 21

deepest muscle of abdominal wall; fibers run horizontally

Back 21

abdominal wall- transverse abdominus (des & def)

Front 22

compress abdominal contents

Back 22

abdominal wall- transverse abdominus (action)

Front 23

sole, large fleshy muscle of posterior humerus; 3-headed origin

Back 23

forearm- triceps brachii (des & def)

Front 24

powerful forearm extensor; antagonist of forearm flexors (brachialis and biceps brachii)

Back 24

forearm- triceps brachii (action)

Front 25

most familiar muscle of anterior humerus bc this 2-headed muscle bulges when forearm is flexed.

Back 25

forearm- biceps brachii (des & def)

Front 26

flexion (powerful) of elbow and supination of forearm; "it turns the corkscrew and pulls the cork"; weak arm flexor.

Back 26

forearm- biceps brachii (action)

Front 27

superficial muscle of lateral forearm; forms lateral boundary of antecubital fossa

Back 27

forearm- brachioradialis (des & def)

Front 28

synerist in forearm flexion

Back 28

forearm- brachioradialis (action)

Front 29

immediately deep to bicepts brachii

Back 29

forearm- brachialis (des & def)

Front 30

a major flexor of forearm

Back 30

forearm- brachialis (action)

Front 31

seen in as uperficial view between proximal margins of brachioradialis and flexor carpi radialis

Back 31

superficial hand- pronator teres (des & def)

Front 32

acts synergistically with pronator quadratus to pronate forearm; weak elbow flexor

Back 32

superficial hand- pronator teres (action)

Front 33

superficially; runs diagonally across forearm

Back 33

superficial hand- flexor carpi radialis (des & def)

Front 34

reduces angle between 2 bones

Back 34

flexor

Front 35

hand

Back 35

radial

Front 36

powerful flexor of wrist; abducts hand

Back 36

superficial hand- flexor carpi radialis (action)

Front 37

sm fleshy muscle with a long tendon; medial to flexor carpi radialis

Back 37

superficial hand- palmaris longus (des & def)

Front 38

flexes wrist (weak); tenses skin and fascia of palm

Back 38

superficial hand- palmaris longus (action)

Front 39

deeper muscle (deep to muslces of superior hand); visible at distal end of forearm

Back 39

superficial hand- flexor digitorum superficialis (des & def)

Front 40

flexes wrist and middle phalanges of finger 2-5

Back 40

superficial hand- flexor digitorum superficialis (action)

Front 41

superficial; medial to extensor carpi radialis brevis

Back 41

superficial hand- extensor digitorum (des & def)

Front 42

prime mover of finger extension; extends wrist; can flare (abduct) fingers

Back 42

superficial hand- extensor digitorum (action)

Front 43

deep muscle at posterior aspect of elbow

Back 43

deep hand- supinator (des & def)

Front 44

acts with bicepts brachii to supinate forearm; antagonist of pronator muscles

Back 44

deep hand- supinator (action)

Front 45

two closely related muscles; fibers pass under inguinal ligament to insert into femur via a common tendon; iliacus is more lateral.

Back 45

thigh and leg- Illiopsas: illiacus and psoas major (action)

Front 46

flex trunk on thigh; flex thigh; lateral flexion of vertebral column (psoas)

Back 46

thigh and leg- Illiopsas: illiacus and psoas major (des & def)

Front 47

straplike superficial muscle running obliquely across anterior surface of thigh to knee

Back 47

thigh and leg- sartorius (des & def)

Front 48

flexes, abducts, and laterally rotates thigh; flexes knee; known as "taylor's muscle" bc it helps effect cross-legged position in which taylors are ofter depicted

Back 48

thigh and leg- sartorius (action)

Front 49

large muscle mass forming medial aspect of thigh; one is superior to the other

Back 49

thigh and leg- adductors longus (superior) and magnus (des & def)

Front 50

adduct and medially rotate and flex thigh; posterior part of _ is also a synergist in thigh extension

Back 50

thish and leg- adductors longus and magnus (synergist) (des & def)