UE Scapula/Shoulder/Upper Arm Flashcards
Pectoralis Major-Clavicular
Shoulder flexion, MR, horizontal ADD
Origin fixed - humeral ADD and MR
Insertion fixed - assists in elevation of thorax in force inspiration
Pectoralis Major-Sternal
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
Pectoralis Minor
Origin fixed - tilts scapula anteriorly
Insertion fixed - assists in forced inspiration
May help with downward rotation or prevents upward rotation
Subclavius
Draws clavicle down and stabilizes joint
Latissimus Dorsi
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
Teres Major
Shoulder MR, ADD, Extension
Scapular internal rotation
Serratus Anterior
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
Supraspinatus
ABD shoulder
Stabilizes head of humerus in glenoid cavity
May assist with shoulder LR
Infraspinatus
LR shoulder
Stabilizes head of humerus in glenoid cavity
Scapular internal rotation
Subscapularis
MR shoulder
Stabilizes head of humerus in glenoid cavity
Prevents humeral anterior glide
Anterior Deltoid
Shoulder ABD, flexion and MR
Middle Deltoid
Shoulder ABD
Scapular downward rotation
Posterior Deltoid
Shoulder ABD, extension and LR
Scapular internal rotation
Upper Trapezius
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
Middle Trapezius
Origin fixed - ADD scapula, stabilization when scapula is upwardly rotated
Acting bilaterally - externally rotates scapula and some upward rotation
Lower Trapezius
Origin fixed - stabilization of scapula during ADD, upward rotation, depress scapula
Acting bilaterally - external and upward rotator, helps with posterior tilt
Levator Scapulae
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
Rhomboids Major
ADD, elevates and downwardly rotates scapula
Externally rotates scapula
Stiffness helps prevent scapular internal rotation
Rhomboids Minor
ADD, elevate scapula
Rotate scapula so glenoid cavity faces caudally
Externally rotates scapula
Teres Minor
LR shoulder
Stabilizes head of humerus in glenoid cavity during movements
Scapular internal rotation
Coracobrachialis
Flexion and ADD of shoulder
Triceps Brachii
Extends elbow
Long head - assists in ADD and ext of shoulder
Biceps Brachii
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
Brachialis
Elbow flexion
