Scapular Region and Shoulder Flashcards
deltoid origin
lateral ⅓ clavicle, acromion, spine of scapula
deltoid insertion
deltoid tuberosity of humerus
deltoid innervation
axillary (C5,6)
deltoid actions
anterior: flex and medially rotate humerus
middle: abduct humerus
posterior: extend and laterally rotate humerus
teres major origin
dorsal surface of inferior angle of scapula
teres major insertion
medial lip of intertubercular groove of humerus
teres major innervation
lower subscapular (C5,6)
teres major action
medially rotate and adduct humerus
supraspinatus origin
supraspinous fossa of scapula
supraspinatus insertion
superior facet on greater tubercle of humerus
supraspinatus innervation
suprascapular (C4,5,6)
supraspinatus action
initiates and assists deltoid in abduction of glenohumeral joint and acts with rotator cuff muscles
infraspinatus origin
infraspinous fossa of scapula
infraspinatus insertion
middle facet on greater tuberosity of humerus
infraspinatus innervation
suprascapular (C5,6)
infraspinatus action
laterally rotate glenohumeral joint and help hold humeral head in glenoid cavity of scapula
teres minor origin
superior part of lateral border of scapula
teres minor insertion
inferior facet on greater tuberosity of humerus
teres minor innervation
axillary (C5,6)
teres minor action
laterally rotate glenohumeral joint; help hold humeral head in glenoid cavity of scapula
subscapularis origin
subscapular foss of scapula
subscapularis insertion
lesser tuberosity of humerus
subscapularis innervation
upper and lower subscapular nerves (C5,6,7)
subscapularis action
medially rotate glenohumeral joint and adduct it; help hold humeral head in glenoid cavity
what muscles does the axillary nerve innervate?
teres minor; deltoid
how many muscles have attachment on the scapula?
26
what are the actions of the omohyoid?
depress hyoid bone; does not have action on the scapula
a patient who was recently in a car accident complains of shoulder pain when he brings his arm across his chest. you deduce that the pain is due to stretching of the lateral rotators of the shoulder. what muscle is most likely the source of pain?
infraspinatus
a woman is playing a strenuous game of tennis and suddenly complains of severe pain at the shoulder. she cannot initiate abduction of the humerus at the GHJ. if the arm is passively elevated about 40˚, she is able to fully bring the arm overhead. what muscle has been injured?
supraspinatus
what are the attachments of the deltoid?
clavicle, acromion, spine of scap, humerus
what muscles make up the rotator cuff?
infraspinatus, supraspinatus, subscapularis, teres minor
what muscle is the strongest medial rotator of the arm?
subscapularis
an older patient complains of shoulder pain and difficulty abducting his arm. an arthroscpe with dye is done and the radiologist notes that the dye has leaked from the shoulder joint into the subacromial bursa. what tendon would be ruptured for this to occur?
supraspinatous
omohyoid attachment
superior border near suprascaular notch
what are the external rotators of the shoulder?
teres minor, infraspinatus
what are the internal rotators of the shoulder?
latissimus dorsi, teres major, subscapularis, pec major,
apley scratch test
(over head) external rotation, extension, abduction
(reach across) internal rotation and adduction
(reach behind) internal rotation and adduction
drop arm test
supraspinatus and deltoid
apprehension test
GHJ dislocation
yergason test
biceps tendon; transverse humeral ligament
Resisted Ext Rotation & Flexion of the Biceps
Forearm Flexed @ Elbow
roos test
numbness, tingling
blue–venous
white–arterial compression
adson test
external rotation and extension of humerus
patient’s head turned towards that side
take radial pulse
