1where do your extrinsic back muscles attach
attach to the axial skeleton and upper limb
2where do your intrinsic (scapulohumeral) muscles attach
attach to the pectoral girdle and humerus
3name the 6 intrinisic shoulder muscles
deltoid, teres major, supraspinatus, infraspinatus, teres minor, subscapularis
4what 4 muscles make up the rotator cuff
supraspinatus, infraspinatus, teres minor, subscapularis
5what is the origin of the acromial head of the deltoid
acromion process
6what is the origin of the clavicular head of the deltoid
lateral third of clavicle
7what is the origin of the posterior spinal head of the deltoid
scapular spine
8what is the insertion of the deltoid
deltoid tuberosity
9what is the function of the anterior head of the deltiod
flex and medially rotate humerus
10what is the function of the middle/acromial head of the deltoid
abduct humerus
11what is the function of the posterior head of the deltoid
extend and laterally rotate humerus
12what is the innervation of the deltoid
axillary nerve
13what is the origin of the teres major
inferior angle of scapula
14what is the insertion of the teres major
medial lip of intertubercular sulcus
15what is the function of the teres major
adduct and medially rotate humerus
16what is the innervation of the teres major
lower subscapular nerve
17what is the main action of the middle head of the deltiod
abduction
18what is the origin of the supraspinatus
supraspinous fossa
19what is the insertion of the supraspinatus
greater tubercle
20what is the function of the supraspinatus
initiates abduction
21what is the innervation of the supraspinatus
suprascapular nerve
22what is the origin of the teres minor
lateral border of scapula
23what is the insertion of the teres minor
greater tubercle
24what is the function of the teres minor
lateral rotation
25what is the innervation of the teres minor
axillary nerve
26what is the origin of the subscapularis
subscapular fossa
27what is the insertion of the subscapularis
lesser tubercle
28what is the action of the subscapularis
medial rotation
29what is the innervation of the subscapularis
upper and lower subscapular nerve
30which rotator cuff muscle medially rotates the humerus
subscapularis