Pages Below:
| |
7.2.5 Nerve Supply
| Knowledge of origin, region of supply, common
sites/effects of lesions, common clinical tests (reflex jerks);
identification of major nerves on prosections. |
|
| Dermatomes: concept, distribution in upper limb, clinical
significance in mapping injuries to spinal roots. |
|
| Anatomical basis of determination of nerve root, brachial
plexus and major nerve lesions from testing sensation and motor function. |
|
7.2.5.1 Brachial plexus
| Principles of organisation; anterior primary rami C5–T1
— roots of brachial plexus; trunks (upper, middle, lower), suprascapular
nerve; divisions (anterior (to flexors) and posterior (to extensors));
cords (lateral, medial, posterior) (identification, relationship to
axillary structures, terminal branches). |
Branches of roots (to scalene muscles, subclavius,
rhomboids, serratus anterior) |
| Effects of damage to upper, lower trunks, T1 |
|
7.2.5.2 Lateral cord of the brachial plexus
7.2.5.2.1 Musculocutaneous nerve
| Segmental origin; muscular supply; terminal sensory
branch |
Lateral cutaneous nerve of forearm. |
7.2.5.2.2 Median nerve
| Segmental origin; roots from lateral and medial cords;
muscular supply; sensory distribution; relationship to carpal tunnel (palmar
cutaneous branch). |
|
| Effects of median nerve damage in supracondylar fractures
of humerus, carpal tunnel syndrome. |
|
7.2.5.3 Medial cord of the brachial plexus
| Distribution, esp. medial root of median nerve. |
Medial pectoral nerve; medial cutaneous nerves of arm and
forearm |
7.2.5.3.1 Ulnar nerve
| Segmental origin; muscular supply; sensory distribution. |
|
| Effects of lesion at elbow, wrist. |
|
7.2.5.4 Posterior cord of the brachial plexus
| Distribution to extensor muscles and skin. |
Upper and lower subscapular nerves; posterior cutaneous
nerve of arm. |
7.2.5.4.1 Axillary nerve
| Segmental origin; muscular supply; sensory distribution. |
|
| Effects on nerve of shoulder dislocation |
|
7.2.5.4.2 Radial nerve
| Segmental origin; muscular supply; sensory distribution. |
|
| Effects on nerve of mid-shaft fracture of humerus |
"Drunkard’s palsy" |
|