Brachial Plexus

Question 1

what are the three trunks of the brachial plexus?

Answer 1

superior , middle, and inferior

Question 2

which trunk of the brachial plexus does the suprascapular nerve arise from?

Answer 2

superior trunk

Question 3

what are the three cords of the brachial plexus?

Answer 3

Lateral, posterior and medial

Question 4

the three cords of the brachial plexus are in relationship to what structure?

Answer 4

the axillary artery

Question 5

the axillary nerve arises from which cord of the brachial plexus?

Answer 5

posterior cord

Question 6

the radial nerve arises from what cord of the brachial plexus?

Answer 6

posterior cord

Question 7

the median nerve arises from which two cords of the brachial plexus?

Answer 7

lateral and medial

Question 8

the lower, upper subscapular nerves and the thoracodorsal nerve arise from which cord of the brachial plexus?

Answer 8

posterior cord

Question 9

the medial cutaneous nerve of the arm arises from which cord of the brachial plexus?

Answer 9

medial

Question 10

the medial cutaneous nerve of the forearm arises from which cord of the brachial plexus?

Answer 10

medial

Question 11

the musculocutaneous nerve arises from which cord of the brachial plexus?

Answer 11

lateral cord

Question 12

which nerve gives rise to the inferior lateral cutaneous nerve of the arm?

Answer 12

radial nerve

Question 13

what nerve gives rise to the superior lateral cutaneous nerve of the arm?

Answer 13

axillary nerve

Question 14

the radial nerve passes to the posterior arm through which space in the shoulder?

Answer 14

triangular interval

Question 15

what arterial structure is within the triangular space of the shoulder?

Answer 15

circumflex scapular artery

Question 16

what is the innervation of the teres major muscle?

Answer 16

lower subscapular nerve

Question 17

what is the innervation of the teres minor muscle?

Answer 17

axillary nerve

Question 18

what is the innervation of the latissimus dorsi?

Answer 18

thoracodorsal nerve

Question 19

what is the innervation of the pec minor?

Answer 19

medial pectoral nerve

Question 20

what nerve innervates the rhomboid and levator scapulae?

Answer 20

dorsal scapular nerve

Question 21

the suprascapular nerve provides sensory innervation to what structure of the shoulder?

Answer 21

shoulder joint capsule

Question 22

glenohumeral dislocation causes injury to what nerve that passes inferior to the joint capsule?

Answer 22

axillary nerve

Question 23

what structure is derived from the ventral rami of C5 - T1?

Answer 23

brachial plexus

Question 24

the ventral rami that make up the brachial plexus travel between what muscles?

Answer 24

anterior and middle scalene

Question 25

describe the general relationship of the trunks and cords of the brachial plexus in relationship to the clavicle?

Answer 25

trunk - supraclavicular
cord - infraclavicular