Nerves

Question 1

Divisions of the PNS

Answer 1

1. Afferent (Info to CNS)
2. Efferent (Info from CNS)

Question 2

Gray Matter?

Answer 2

Contains cell bodies of neurons and other non-neuronal cells

Question 3

White Matter?

Answer 3

Contains primarily axons (Myelinated)

Question 4

Ganglia

Answer 4

Anatomically distinct collection of sensory or motor neuron cell bodies within the PNS

Question 5

Plexus?

Answer 5

Collection/Grouping of nerve fibers

Question 6

Dermatomes?

Answer 6

Areas of skin innervated by the cutaneous branches of each spinal nerves

Question 7

How many nerves originate from the spinal cord and the 4 plexus’

Answer 7

1. 31
2. 4, Cervical, brachial, Lumbar & Sacral

Question 8

Cervical Plexus?

Answer 8

C1-C5
Innervates muscles of neck and diaphragm

Question 9

Brachial?

Answer 9

C5-T1
Muscles of pectoral girdle and upper limbs

Question 10

Major Nerves of the Brachial Plexus?

Answer 10

Axillary, Musculocutaneous, Radial, Median and Ulnar

Question 11

Axillary Nerve?

Answer 11

C5-C6 post cord
Skin of shoulder
Glenohumeral joint

Question 12

Radial Nerve?

Answer 12

C5-C8 post cord
Post. Lat. arm surface, forearm and hand

Question 13

Musculocutaneous Nerve?

Answer 13

C5-C7 Lateral cord
Lateral forearm

Question 14

Ulnar Nerve

Answer 14

C8-T1 med cord
Ulnar third of hand (median palm and dorsal)

Question 15

Median Nerve?

Answer 15

C6-C8, T1 median and lateral cord
Radial portion of palm and fingers