brachial plexus and blood supply geography

Question 1

what three muscles attach on the greater tuberosity?

Answer 1

supraspinatus, infraspinatus, and teres minor

Question 2

name the muscles found attaching in the intertubicular sulcus, from lateral lip, to medial

Answer 2

pecs, lats teres major

Question 3

what important structures pass through the surgical neck of the humerus, (the weak spot)

Answer 3

axillary nerve, and posterior circumflex artery

Question 4

what structures anchor the clavicle at the sternum?

Answer 4

a and p sternoclavicular ligament, costoclavicular lig, interclavicular lig

Question 5

what ligaments are found at the claivic/ coracoid araea?

Answer 5

coraco clavicular ligament, made from the conoid and trapezius lig, coraco-acromial lig,

Question 6

name some structures that help to stablize Gh joint

Answer 6

glenoid labrum, joint capsule and synovial sheath,

Question 7

GH capsular ligaments:

Answer 7

transverse humeral, (S,M,I) glenohumoral, corocohumoral

Question 8

where does the innervation to the trapezius run?

Answer 8

deep to traps (sup-inf) superficial to rhomboids is the spinal accessory nerve.

Question 9

the axillary nerve (to what?) travels where to its muscle?

Answer 9

branches off the posterior cord, then travels behind the arm to the deltoid, wraps around with the post circumflex humoral artery

Question 10

innervation to the lat is, and where?

Answer 10

Thoracodorsal, runs out of posterior cord, and then down through the axilla to the side of thorax (lat)

Question 11

what innervates the teres major? and where does it go?

Answer 11

comes off the posterior cord, then follows the anterior surface of the scapula, wraps to front

Question 12

what are the muscles of the rotator cuff?

Answer 12

supraspinatus, infraspinatus, subscapularis,teres minor

Question 13

what passes through the triangular space?

Answer 13

the radial nerve (originates from posterior cord), as it passes to the back with the profunda brachii artery

Question 14

how do you differentiate between circumflex scapular artery, and posterior circumflex artery?

Answer 14

scap passes through triangular space (medial to biceps), humoral is closer to bone, quadrangular space

Question 15

which peripheral nerves branch off the superior trunk (and are thus c5, c6?

Answer 15

suprascapular, dorsal scapular, long thoracic (add 7) and subclavian

Question 16

what nerve does the musculocutaneous nerve become?

Answer 16

the lateral cutaneous

Question 17

what muscles are innervated by musculocutaneous?

Answer 17

biceps, corocobrachialis and brachialis