Spinal Cord and Spinal Nerves

1
Spinal Cord and Spinal Nerves
2

• General function
• Location
• Cervical and Lumbar Enlargements
• Spinal Nerves
• Cauda equina

3
(No Transcript)
4
Meninges

• Dura mater
• Epidural space
• Arachnoid
• Subarachnoid space Cerebrospinal Fluid - CSF
• Pia mater

5
(No Transcript)
6
(No Transcript)
7
Gray Matter

• Central Canal
• Posterior (dorsal) Horns
• Anterior (ventral) Horns
• Dorsal/Ventral nerve fibers

8
(No Transcript)
9
(No Transcript)
10
(No Transcript)
11
White Matter

• Columns (Anterior, Posterior, Lateral)
• Ascending Tracts
• Descending Tracts UMN

12
(No Transcript)
13
(No Transcript)
14
Spinal Reflex Arc
15
Spinal Reflex Arc

• Receptor
• Sensory (Afferent) Neuron
• Spinal Cord
• Motor (Efferent) Neuron
• Effector

16
Somatic Reflex
17
Autonomic Reflex
18
Monosynaptic Reflex
19
(No Transcript)
20
Polysynaptic Reflex
Interneurons Association neurons In gray matter
of spinal cord
21
Polysynaptic reflex
22

• Ipsilateral (Withdrawal/Flexor Reflex)
• Contralateral (Crossed Extensor Reflex)

23
(No Transcript)
24
(No Transcript)
25
Spinal Nerves

• 31 pair
• Dorsal/Ventral Roots
• Dorsal/Ventral Rami

26
(No Transcript)
27
(No Transcript)
28
(No Transcript)
29
(No Transcript)
30
Plexuses
31
Cervical Plexus

• C1-C4-5
• Phrenic nerve
• Innervates diaphragm

32
(No Transcript)
33
Brachial Plexus

• C5-T1
• Radial nerve
• Musculocutaneous nerve
• Ulnar nerve
• Median nerve

34
(No Transcript)
35
(No Transcript)
36
(No Transcript)
37
Lumbar Plexus

• T12/L1-L4
• Femoral nerve

38
(No Transcript)
39
Sacral Plexus

• Sciatic nerve

40
(No Transcript)
41
Plexuses