Spinal Cord

1
Spinal Cord

• Medical Neuroscience
• Dr. Wiegand

2
Directions
dorsal
rostral
ventral
caudal
3
Terms

• rostral - toward the beak
• caudal - toward the tail
• ventral - toward the front (anterior)
• dorsal - toward the back (posterior)
• superior - above
• inferior - below

4
Spinal Cord

• Central gray nuclei and outer white matter
  (tracts)

5
Peripheral and Central Nervous System
Lesions
6
Spinal nerves cord

• 31 pairs with anterior and posterior root
• C1 often doesnt have posterior root
• Spinal cord enlarged in C5 T1 and L2 S3
  levels
• Spinal cord ends at L1 vertebral level

7
(No Transcript)
8
Dermatomes Myotomes

• Dermatome an area of skin innervated by a
  single posterior root
• Myotome a group of muscles innervated by a
  single anterior root

9
Myotomes
Dermatomes
10
Stretch Reflexes

• Examples
• C5-6 biceps tendon
• C6 brachioradialis
• C7-8 triceps tendon
• L2-4 patellar tendon
• S1-2 Achilles tendon

11
External Spinal Cord
12
External Structure Spinal Cord
13
Internal Structure White Matter
14
White Matter OrganizationAscending Pathways
15
White Matter OrganizationDescending Pathways
16
White Matter OrganizationIntersegmental Pathways
17
(No Transcript)
18
White Matter OrganizationAscending Pathways
19
White Matter OrganizationDescending Pathways
Legs
T
A
Neck
20
Grey Matter Organization
21
Grey Matter OrganizationAnterior Cell Columns
22
Grey Matter OrganizationLateral Grey Horns T1
L2/3
23
Grey Matter OrganizationPosterior Cell Column
24
From Pritchard Alloway Fig. 3-7
25
http//lansing.bellarmine.edu/pt/atlas/cover.html
26
Rexed Lamina
27
Brown-Sequard Syndrome
28
(No Transcript)