Nerves

Question 1

What are the roots of the;
musculotaneous
median
ulnar
radial
axillary

Answer 1

musculotaneous- c5-c7
median - c5-T1
ulnar- c8-t1
radial- c5-t1
axillary- c5,c6

Question 2

Roots of the smaller nerves
dorsal scapular
long thoracic
suprascapula

upper subscapular n
lower subscapular n
thracodorsal n

medial pectoral n
lateral pectoral n
medial cutaneous forearm/arm

Answer 2

dorsal scapular; x5
long thoracic; c5-c7
suprascapula; c5,c6

upper subscapular n; c5,c6
lower subscapular n; c5,c6
thracodorsal n; c6-c8

medial pectoral n; c8,t1
lateral pectoral n; c5-c7
medial cutaneous forearm/arm; c8,t1

Question 3

What is the course of the musculotaneous nerve and the muscle supplied

Answer 3

• coracobrachialis
• betw. biceps brachii and brachialis
• emerges on lat side to become lateral cutaneous n of forearm

Question 4

Muscle supplied of the median nerve

Answer 4

Forearm: P.T, F.C.R, P.L. F.D.S, lateral F.D.P, F pollicus longus, medial FDP

hand; lumbricals 1/2, 3 thenar muscles

Question 5

course of the median nerve

Answer 5

travel in anterior arm
- to lat brachial artery
- cross anterior and medial to brachial artery
- pass betw heads of pronator then deep to FDP
- passes FDS AND FCR and into carpal tunnels at wrist

Question 6

muscles supplied of the ulnar nerve

Answer 6

forearm: CU, medial FDP
hand; hyppthenar musc, interosseous musc, lumbricals 3/4, adductor pollicus

Question 7

course of ulnar nerve

Answer 7

• travel in ant arm; medial to brachial artery
• pass posteriorly over medial head of triceps then superfically betw medial epicondyle and olecranon
• cross elbow betwe heads of FCP to lie superfically at FDP
• pass superficial to FR around hook of hamate into hand

Question 8

muscle supply of radial nerve

Answer 8

arm; post compartment of triceps
forearm; long extensor of wrist, thumb, fingers, brachioraidalis, supinator, anconeus, abductor pollicis longus

Question 9

course of radial nerve

Answer 9

cross at lat tendon and leaves axilla
- pass in radial groove at the shaft of humerus and bewt and lat and medial head of triceps
- pass betw brachialis and brachioradialis and divided in post interosseous and superficial radial branch
- superficial branch runs deep to brachioradialis
- deep branch through supinator posteriorly and interosseous membrane

Question 10

muscle supply of axillary nerve

Answer 10

deltoid and teres minor

Question 11

course of axillary nerve

Answer 11

interior to shoulder joint, posterior to surgical neck of humerus