Anatomy of the Brachial Plexus

Question 1

what is the brachial plexus

Answer 1

the nerve plexus that supplies motor and sensory branches to the shoulder region and the whole of the upper limb

Question 2

where does the brachial plexus arise from

Answer 2

from anterior rami of C5-T1

Question 3

how are the cords of the brachial plexus named

Answer 3

according to their relationship to the axillary artery

Question 4

what roots of the brachial plexus form the superior(upper) trunk

Answer 4

C5 and C6

Question 5

what root of the brachial plexus forms the middle trunk

Answer 5

C7

Question 6

what roots of the brachial plexus forms the inferior(lower) trunk

Answer 6

C8 and T1

Question 7

describe the divisions of the brachial plexus

Answer 7

there is an anterior and posterior division from each trunk, so 6 divisions in total

Question 8

how many branches come from the divisions of the brachial plexus

Answer 8

none

Question 9

what are the 3 different cords of the brachial plexus

Answer 9

posterior cord, medial cord, lateral cord

Question 10

what forms the posterior cord in the brachial plexus

Answer 10

the 3 posterior divisions form the posterior cord

Question 11

what forms the medial cord of the brachial plexus

Answer 11

the anterior division of the inferior trunk forms the medial cord

Question 12

what forms the lateral cord of the brachial plexus

Answer 12

anterior divisions of the superior and middle trunks come together to form lateral cord

Question 13

what are the 5 main motor and sensory nerves of the upper limb,(which are the main branches of the brachial plexus)

Answer 13

musculocutaneous nerve, median nerve, ulnar nerve, axillary nerve and radial nerve

Question 14

what is the musculocutaneous nerve a branch of

Answer 14

branch of the lateral cord

Question 15

what is the median nerve a branch of

Answer 15

branch formed from contributions of both the medial and lateral cords

Question 16

what is the ulnar nerve a branch of

Answer 16

branch of the medial cord

Question 17

what are the radial and axillary nerves branches of

Answer 17

branches of the posterior cord

Question 18

what do the minor branches of the brachial plexus supply

Answer 18

supply muscles of the shoulder girdle

Question 19

what are the minor supraclavicular branches of the brachial plexus (4)

Answer 19

long thoracic nerve, nerve to subclavius, suprascapular, dorsal scapular

Question 20

what are the minor infraclavicular branches of the medial cord of the brachial plexus (3)

Answer 20

medial pectoral, medial cutaneous nerve of arm, medial cutaneous nerve of forearm

Question 21

what are the minor infraclavicular branches of the posterior cord of the brachial plexus (3)

Answer 21

upper subscapular, thoracodorsal, lower subscapular

Question 22

what is the minor branch of the lateral cord of the brachial plexus

Answer 22

lateral pectoral

Question 23

what acronym is used to remember the order of the brachial plexus

Answer 23

Really Tired Drink Coffee Now

Root, Trunk, Division, Cord, Nerve