anatomy review from Eleanor

Question 1

Brachial plexus nemeonic

Answer 1

Remember To Drink Cold Beer

(roots, trunks, division, cords, [terminal] branches

Question 2

Roots of brachial plexus
nerve roots
course
branches

Answer 2

nerve roots: ventral rami of C5-T1
course: btwn anterior & middle scalenes
branches (2): 
1. dorsal scapular nerve
2. long thoracic nerve

Question 3

Trunks of brachial plexus
course
nomenclature
branches

Answer 3

course: anterior surface of middle scalene
nomenclature:
1. superior
2. middle
3. inferior
branches (2): both off superior trunk
1. suprascapular nerve
2. nerve to subclavius

Question 4

Divisions of brachial plexus
course
nomenclature
branches

Answer 4

course: posterior & inferior to clavicle
nomenclature:
 1. anterior division
 2. posterior division
branches: none

Question 5

Cords of Brachial Plexus
course
nomenclature
branches

Answer 5

named for position relative to axillary artery; 
 1. lateral
 2. posterior
 3. medial
branches (7)
 off the lateral cord: 
 1. lateral pectoral nerve 
 off the posterior cord
1. upper subscapular nerve
2. thoracodorsal nerve
3. lower subscapular nerve
off the medial cord:
1. medial pectoral nerve
2. medial brachial cutaneous nerve
3. medial antebrachial cutaneous nerve

Question 6

terminal Branches of Brachial Plexus

roots and names

Answer 6

Musculocutaneous Nerve (C5-C7)
Axillary (C5-C6)
Radial Nerve (C5-T1)
Median Nerve (C6-T1)
Ulnar Nerve (C7-T1)

Question 7

dorsal scapular nerve
roots
course
distribution

Answer 7

roots of dorsal scapular nerve: C4-C5

course: branches off from the roots of the BP;
pierces MIDDLE SCALENE
descends deep to RHOMBOIDS &; LEVATOR SCAP

distribution of dorsal scapular nerve:
motor to RHOMBOIDS &; LEVATOR SCAP

Question 8

long thoracic nerve
roots
course
distribution

Answer 8

roots of LTN C5-C7

course: from the roots; passes over SERRATUS ANTERIOR
distribution: SERRATUS ANTERIOR

Question 9

suprascapular nerve
roots
course
distribution

Answer 9

roots of suprascapular nerve C4-C6

course: from the trunk; thru scapular notch with suprascapular artery; under transverse scapular ligament (artery runs over; Navy goes under the bridge, army goes over)

distribution:
motor: SUPRA & INFRASPINATUS
sensory: GH joint

Question 10

nerve to subclavius
roots
course
distribution

Answer 10

roots of nerve to subclavius: C4-C6

course: from the trunk
innervates subclavius

Question 11

lateral pectoral nerve
roots
course
distribution

Answer 11

roots of lateral pectoral nerve: C5-C6

course: from the lateral cord, pierces claviopectoral fascia, deep to pec major
distribution: pec major

Question 12

upper subscapular nerve
roots
course
distribution

Answer 12

roots of subscapular nerve: C5-C6

course: branch off posterior cord, pierces subscap
distribution: subscap

Question 13

thoracodorsal nerve
roots
course
distribution

Answer 13

roots of thoracodorsal nerve: C5-C8
a.k.a. middle subscap nerve

course: branch off lateral cord, down posterior axillary wall with thoracodorsal artery
distribution: LATISSIMUS DORSI

Question 14

lower subscapular nerve
roots
course
distribution

Answer 14

roots of lower subscap: C5-C6

course: branch off posterior cord; runs deep to subscap artery & vein

innervates: SUBSCAP (lower portion) &
TERES MAJOR

Question 15

medial pectoral nerve
roots
course
distribution

Answer 15

roots of medial pectoral nerve: C5-C7

course: branch of medial cord; between axillary artery & vein, pierces PEC MAJOR AND MINOR
distribution: motor to PEC MAJOR &; MINOR

Question 16

medial brachial cutaneous nerve
roots
course
distribution

Answer 16

roots to medial brachial cutaneous nerve: C8-T1

course: branch of medial cord running along medial side of arm
distribution: sensation to medial aspect of arm

Question 17

medial antebrachial cutaneous nerve
roots
course
distribution

Answer 17

roots to MABC nerve: C8-T1

course: runs with ulnar nerve then sub-q tissue of forearm
distribution: sensation to medial aspect of forearm

Question 18

musculocutaneous nerve
roots
course
distribution

Answer 18

roots of musculocutaneous nerve: C5-C7

course: pierces CORACOBRACHIALIS then runs between bicep brachii & brachialis. CONTINUES AS LATERAL ANTEBRACHIAL CUTANEOUS NERVE

distribution: motor:
CORACOBRACHIALIS
BICEP BRACHII
BRACHIALIS

sensory:
lateral skin of forearm

Question 19

axillary nerve
roots
course
distribution

Answer 19

roots of axillary nerve: C5-C6

course: pass thru quadrangular space; winds around surgical head of humerus

distribution: motor:
DELTOIDS
TERES MINOR

sensory:
GH joint
superolateral arm (over deltoid)

Question 20

radial nerve
roots
course
distribution

Answer 20

roots of radial nerve: C5-T1

course: radial groove btwn lateral and medial heads of tricep. branches into SUPERFICIAL &; DEEP INTEROSSEOUS NERVE

distribution: motor
TRICEPS
ANCONEUS
BRACHIORADIALIS
ECRL
ECRB

Question 21

median nerve
roots
course
distribution

Answer 21

roots of median nerve: C6-T1

course: descends thru arm with brachial artery

distribution: 
PRONATOR TERES
FCR
PALMARIS LONGUS
FDS

Question 22

ulnar nerve
roots
course
distribution

Answer 22

roots of ulnar nerve: C7-T1

course: posterior to medial epicondyle then down ulnar aspect of the arm

distribution:
FCU
FLEXOR DIGITORUM PROFUNDUS (3 & 4)