deck 1, nerves and actions shoulder

Question 2

unilateral action of superior fibers of trapezius

Answer 2

Elevation and upper rotation of the scapula; ipsilateral side bending (laterally flex) and contralateral rotation of the head

Question 3

bilateral action of superior fibers of trapezius

Answer 3

Bilaterally: extend the head and neck

Question 4

action of the middle fibers of trapezius

Answer 4

retraction of scapula, adduct and stablize scap

Question 5

action of inferior fibers of trapezius

Answer 5

depression of the scapula, upwardly rotate scapula

Question 6

all three parts of the trapezius are innervated by

Answer 6

CN XI (accessory nerve) C3, C4

Question 7

action of rhomboid major

Answer 7

elevates and retracts the scapula, adducts the scapula, downwardly rotates scapula

Question 8

action of rhomboid minor

Answer 8

Elevates and retracts the scapula, adduct the scapula, downwardly rotate the scapula

Question 9

rhomboid minor and major are innervated by

Answer 9

dorsal scapular nerve (c4-c5)

Question 10

action of the levator scapulae

Answer 10

elevates the scapula, ipsilaterally side bending and rotation of the head, downwardly rotate the scapulaBilaterally: extend the head and neck

Question 11

innervation of the levator scapulae

Answer 11

anterior rami of c3 and c4 spinal nerves and by c5 brances of dorsal scapular nerve

Question 12

latissimus dorsi actions:

Answer 12

adduction, medial rotation and extension of the arm at the glenohumeral joint

Question 13

innervation of latissimus dorsi

Answer 13

thoracodorsal nerve c6, c7,c8

Question 14

teres major action

Answer 14

medial rotation, extension of the arm and adduction of the glenohumeral joint

Question 15

innervation of teres major

Answer 15

lower subscapular nerve c5, c6

Question 16

deltoid, posterior action

Answer 16

abbduct, extension, horizontal abduction and external rotation of the humerus

Question 17

deltoid middle fibers action

Answer 17

abduction of humerus

Question 18

deltoid anterior fibers, action

Answer 18

abduct, flexion, horizontal adduction, internal rotation of the humerus

Question 19

innervation of all deltoid parts

Answer 19

Axillary, C5, C6

Question 20

action of pectoralis major:

Answer 20

A: All fibers: flexion, adduction of glenohumeral (GH) joint, and medial rotation of glenohmeral joint; assist to elevate the thorax during forced inhalation with arm fixed; Clavicular head: flexion of the extended shoulder horizontal adduction of GH joint;Sternocostal head: extension of the flexed shoulder

Question 21

action of pectoralis minor

Answer 21

A: Stabilization of the scapula against thoracic wall by pulling the coracoid process anteriorly, downward rotation of the scapula; depression of the scapula, abduction of the scapula

Question 22

innervation of pectoralis major:

Answer 22

Medial and lateral pectoral nerves (C5-T1)Clavicular head: lateral pectoral (C5, C6)Sternocostal head: lateral and medial pectoral nerves (C7, C8, T1)

Question 23

innervation of pectoralis minor

Answer 23

Medial pectoral nerve (C8, T1) (some with fibers from the communicating branch of the lateral pectoral nerve C6, C7,C8,T1)

Question 24

subclavius action:

Answer 24

anchors and stablized the sternoclavicular joint, depresses and draws the clavicle anteriorly, elevates the first rib (inhale)

Question 25

innervation of sublcavius:

Answer 25

subclavian nerve, C5, C6

Question 26

serratus anterior: action, fixed origin

Answer 26

abduct/protraction of the scapula, upwardly rotat the scapula, depresses the scap, hold the medial and inferior borders of the scapula against the rib cage

Question 27

serratus anterior action, with scap fixed

Answer 27

elevate the thorax during forced inhalation

Question 28

serratus anterior, innervation

Answer 28

long thoracic nerve, C5, C6, C7

Question 29

action of the coracobrachialis

Answer 29

flexor and aDD of the arm at the glenohumeral joint

Question 30

innervation of the coracobrachialis

Answer 30

musculocutaneous nerve C5, C6, c7

Question 31

Action of the infraspinatus (rotator cuff muscle)

Answer 31

assists with maintaining gh sstability, lateral rotation of the arm at gh, aDD of the shoulder at GH

Question 32

innervation of the infraspinatus

Answer 32

suprascapular nerve (C5, C6)

Question 33

action of the teres minor

Answer 33

rotator cuff: lateral (ext) rot of gh, aDD shoulder at GH, stablize GH

Question 34

innervation of the teres minor:

Answer 34

axillary nerve, C5, c6

Question 35

subscapularis innervation

Answer 35

upper and lower subscapular nervs c5 C6 c7

Question 36

action of brachialis

Answer 36

flexion of the forearm at elbow in al positions

Question 37

subscapularis action

Answer 37

rotator cuff muscle: assist with gh stability, medial rotation of shoulder at gh

Question 38

action of the bicepc

Answer 38

flexion of the forearm at the lebow joint and supination of the arm at the gh, accessory flexor of the arm at the gh

Question 39

innervation of biceps brachii

Answer 39

musculocutaneous c5 C6

Question 40

innervation of brachialis

Answer 40

musculocutaneous c5 C6

Question 41

innervation of the triceps brachii

Answer 41

radial nerve (c6, C7, C8

Question 42

action of triceps brachii:

Answer 42

extention of the forearm at elbow joint, long head: extend + ADD at gh