shoulder and arm: bones and bony landmarks

Question 1

3 bones that make up the shoulder complex

Answer 1

clavicle, scapula, humerus

Question 2

the humerus and scapula form the ____ joint

Answer 2

genohumeral joint

Question 3

a winged scapula indicates weakness in ____ muscle

Answer 3

serratus anterior

Question 4

acromion is attachment site for which 2 muscles?

Answer 4

trapezius and deltoid

Question 5

the 3 muscles that attach to the greater tubercle of the humerus

Answer 5

supraspinatus, infraspinatus, teres minor

Question 6

where do 2 ends of clavicle attach?

Answer 6

-medial attachment: ribs
-lateral attachment: acromion

Question 7

what function does the subscapular fossa have?

Answer 7

smooth surface for muscle attachments

Question 8

what are the 3 joints of the upper extremity?

Answer 8

GAS:
-Glenohumeral (glenoid + humerus)
-acromioclavicular (acromion + clavicle)
-scapulothoracic (scapula + ribs) or SCAPULARCLAVICULAR

Question 9

Describe the rotator cuff + its 4 muscles

Answer 9

4 muscles of the rotator cuff:
- the subscapularis
- teres minor
- supraspinatus
- infraspinatus.
Together they assist in stabilizing the shoulder joint as well as in performing various arm movements.