A4 Spinal Chord New

Question 1

Herniated disk effects

Answer 1

Typically acts on spinal nerve one veterbral level inferior (right before it comes out)

Question 2

PNS Crainial Nerves

Answer 2

Cranial Nerves
12 pair
Cerebrum and Brainstem
Pass through foramina in skill

Question 3

PNS spinal nerves

Answer 3

31 pairs

• start in spinal chord
• exit through intervertebral foramina

8 cervical
12 thoracic
5 lumbar
5 sacral
1 coccygeal

(C1 SN above C1 Vertabra)
(C8 SN below C7)
(T1 Sn starts below T1 V)

Question 4

Identify Spinal Nerve Components

Answer 4

Rootletts

Posteror Root (axons of sensory neurons)

Posterior Root Ganglion (Bodies of sensory neurons)

Anterior Root (axons of motor neurons)

Mixed spinal nerve (Very short section)

Anterior Ramus,

Posterior Ramus

Question 5

Somatic Nervous system: Motor and Sensory

Answer 5

Innervates teh body wall (Parietal Structures)

Voluntary motor control over skeletal (striated) muscle movement

Sensory signals from the body wall are very specific abuot pain, temp, and touch

Most cranial nerves and ALL spinal nerves

each spinal nerve responsible for one dermatome

Question 6

Somatic Motor Cell Bodies

Answer 6

(Draw)

anterior horn, and leave from anterior root

Question 7

Sensory Cell Bodies

Answer 7

(Draw)

posterior root ganglion, sensory axons tranvel in posterior root in two directions?
-pseudounipolar

Question 8

Sensu Stricto

Answer 8

Mixed spinal nerve, very short

Question 9

Anterior and Posterior Rami

Answer 9

Mixed motor and sensory!

Question 10

Epaxial Musculature innervation

Answer 10

Posterior Rami! (Intrinsic back muscles)

1. Erector spinae muscle group
2. transversospinalis muscle group
3. splenius capitis and cervicis
4. suboccipital triangle

Question 11

Hypaxial Musculature

Answer 11

Anterior and posterior rami used for all hypaxial (extrinsic) back muscles