UE Scapula/Shoulder/Upper Arm

Question 1

Pectoralis Major-Clavicular

Answer 1

Shoulder flexion, MR, horizontal ADD
Origin fixed - humeral ADD and MR
Insertion fixed - assists in elevation of thorax in force inspiration

Question 2

Pectoralis Major-Sternal

Answer 2

Depress shoulder girdle and ADD humerus torward opposite iliac crest
Origin fixed - humeral ADD and MR
Insertion fixed - assists in elevation of thorax in forced inspiration

Question 3

Pectoralis Minor

Answer 3

Origin fixed - tilts scapula anteriorly
Insertion fixed - assists in forced inspiration
May help with downward rotation or prevents upward rotation

Question 4

Subclavius

Answer 4

Draws clavicle down and stabilizes joint

Question 5

Latissimus Dorsi

Answer 5

Origin fixed - shoulder MR, ADD, and extension
Depresses shoulder girdle
Assists in trunk lateral flexion
Insertion fixed - assists in anterior and lateral pelvic tilts
Assists in lumbar hyperextension

Question 6

Teres Major

Answer 6

Shoulder MR, ADD, Extension

Scapular internal rotation

Question 7

Serratus Anterior

Answer 7

Origin fixed - ABD and upwardly rotates scapula
Holds medial border of scapula firmly against rib cage
Lower fibers my depress scapula and upper fibers may elevate
Best scapular upward rotator and posterior tilter
Helps externally rotate scapula

Question 8

Supraspinatus

Answer 8

ABD shoulder
Stabilizes head of humerus in glenoid cavity
May assist with shoulder LR

Question 9

Infraspinatus

Answer 9

LR shoulder
Stabilizes head of humerus in glenoid cavity
Scapular internal rotation

Question 10

Subscapularis

Answer 10

MR shoulder
Stabilizes head of humerus in glenoid cavity
Prevents humeral anterior glide

Question 11

Anterior Deltoid

Answer 11

Shoulder ABD, flexion and MR

Question 12

Middle Deltoid

Answer 12

Shoulder ABD

Scapular downward rotation

Question 13

Posterior Deltoid

Answer 13

Shoulder ABD, extension and LR

Scapular internal rotation

Question 14

Upper Trapezius

Answer 14

Origin fixed - stabilization of scapula when ADD, upward rotation, elevation
Insertion fixed - extend, laterally flex, and rotate head and joints of cervical vertebrae so face turns to opposite side
Acting bilaterally - extends neck, accessory muscle to respiration, elevates and retracts clavicle

Question 15

Middle Trapezius

Answer 15

Origin fixed - ADD scapula, stabilization when scapula is upwardly rotated
Acting bilaterally - externally rotates scapula and some upward rotation

Question 16

Lower Trapezius

Answer 16

Origin fixed - stabilization of scapula during ADD, upward rotation, depress scapula
Acting bilaterally - external and upward rotator, helps with posterior tilt

Question 17

Levator Scapulae

Answer 17

Origin fixed - elevates scapula and assists in rotation so glenoid cavity faces caudally
Insertion fixed and acting unilaterally - laterally flexes cervical vertebrae and rotates to SAME side
Acting bilaterally - assists in cervical extension

Question 18

Rhomboids Major

Answer 18

ADD, elevates and downwardly rotates scapula
Externally rotates scapula
Stiffness helps prevent scapular internal rotation

Question 19

Rhomboids Minor

Answer 19

ADD, elevate scapula
Rotate scapula so glenoid cavity faces caudally
Externally rotates scapula

Question 20

Teres Minor

Answer 20

LR shoulder
Stabilizes head of humerus in glenoid cavity during movements
Scapular internal rotation

Question 21

Coracobrachialis

Answer 21

Flexion and ADD of shoulder

Question 22

Triceps Brachii

Answer 22

Extends elbow

Long head - assists in ADD and ext of shoulder

Question 23

Biceps Brachii

Answer 23

Shoulder flexion
Long head - May passively restrict humeral anterior and superior translation
Origin fixed - elbow flexion moving forearm toward humerus, forearm supination
Insertion fixed - elbow flexion moving humerus toward forearm

Question 24

Brachialis

Answer 24

Elbow flexion