Brachial Plexus and Nerves of Upper Limb

Question 0

long thoracic

Answer 0

O: post aspect of ant rami of C5, C6, C7

I: serratus anterior

Question 1

dorsal scapular

Answer 1

O: post aspect of ant rami of C5, contributions from C4

I: rhomboids, occasionally levator scapulae

Question 2

suprascapular

Answer 2

O: sup trunk, receiving fibers frm C5, C6 and often C4
I: supraspinatous, infraspinatous, and glenohumeral joint

Question 3

subclavian nerve

Answer 3

O: sup trunk, receiving fibers from C5, C6 and oftern C4
I: subclavius and sternoclavicular joint

Question 4

lateral pectoral

Answer 4

O: side branch of lateral cord
receives fibers from C5, C6, and C7
I: primarily pec major,
some fibers pass to pec minor

Question 5

musculocutaneous

Answer 5

O: terminal branch of lateral cord
	receiving fibers from C5-C7
I: muscles of ant compartment of arm
		-- coracobrachialis, biceps brachii, brachialis
	skin of lateral aspect of forearm

Question 6

median

Answer 6

O: lateral root– terminal branch of lateral cord
receives fibers from C6 and C7
medial root– terminal branch of medial cord
receives fibers from C8 and T1
I: muscles of ant forearm compartment except for flexor carpi
ulnaris and ulnar 1/2 of flexor digitorum profundus
five intrinsic muscles in thenar 1/2 of palm and palmar skin

Question 7

medial pectoral

Answer 7

O: side branch of medial cord
receiving fibers from C8, T1
I: pec minor and intercostal part of pec major

Question 8

medial cutaneous nerve of arm

Answer 8

O: side branch of medial cord
receives fibers from C8, T1
I: skin of medial side of arm, as far distal as medial epicondyle of
humerus and olecranon of ulna

Question 9

median cutaneous nerve of forearm

Answer 9

O: side branch of median nerve
receives fibers from C8, T1
I: skin of medial side of forearm, as far distal as wrist

Question 10

ulnar

Answer 10

O: larger terminal branch of medial cord
receives fibers from C8, T1, and often C7
I: flexor carpi ulnaris and ulnar 1/2 of flexor digitorum
most intrinsic muscles of hand
skin of hand medial to axial line of digit 4

Question 11

upper subscapular

Answer 11

O: side branch of post cord
receives fibers from C5
I: sup portion of subscapularis

Question 12

lower subscapular

Answer 12

O: side branch of post cord
receives fibers from C6
I: inf portion of subscapularis and teres major

Question 13

thoracodorsal

Answer 13

O: side branch of post cord
receives fibers from C6, C7, C8
I: latissimus dorsi

Question 14

axillary

Answer 14

O: terminal branch of post cord
receives fibers from C5 and C6
I: glenohumeral joint, teres minor, deltoid, skin over superolateral arm

Question 15

radial

Answer 15

O: larger terminal branch of post cord
receives fibers from C5-T1

I: all muscles of post arm and forearm
skin of post and inferolateral arm
post arm
dorsum of hand lateral to axial line of digit 4