Organization of Spinal Cord DOCX Flashcards Preview

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Flashcards in Organization of Spinal Cord DOCX Deck (19):
1

Cervical enlargement

C5 - T1

2

Lumbosacral enlargement

L2 - S3

3

Lumbar puncture

Btw L3 & L4

4

Cauda equina

Horse tail consists of dorsal ventral roots

5

Spinal cord gray matter

Butterfly or H shaped
Contains nerve soma & neuroglia.
Dendrites & axons also found.
Synaptic contacts occur
Dorsal Horn
Intermediate Zone
Lateral Horn
Ventral Horn
Laminae

6

Dorsal horns contain

Central process of pseudo unipolar neurons whose soma are in DRG
Tract cells from ascending
Axon term of descending

7

Intermediate zone

Interneurons which are local circuitry neurons

8

Lateral Horns

Contain preganglionic sympathetic nerve cell body
Present at T1 -L2 spinal cord

9

Ventral Horns

Contains motor neurons whose axons innervate skeletal muscle
Medial: Axial muscles
Lateral: Limb muscles

10

Laminae of Rexed

10 layers of neurons in spinal cord

11

Substantia gelatinosa

Lamina II
Interneurons which play a role in modulation of nociceptive transmission
Special area that not all info make it up to
brain

12

Nucleus proprius

Laminae IV, V & VI
neurons of the spinothalamic tract

13

Lamina IX

Contains motor neurons whose axons run in peripheral nerves to innervate skeletal muscles

14

Intermediolateral cell column

Column of autonomic neurons in the T & upper L segments
Cell bodies of preganglionic sympathetics

15

Nucleus dorsalis

Clarke's column
Column of neurons in the T & upper L segments
Origin of the dorsal spinocerebellar tract

16

Sacral autonomic nucleus

Column of neurons in the mid sacral segments
Preganglionic parasympathetics

17

What is white matter?

Surrounds gray matter
Myelinated axons & neuroglia (some unmyelinated)
Tracts originate in the SC & ascend to high centers
Corticospinal

18

Dorsal Funiculus

Posterior column
Fasiculus gracilis (medially)
Fasiculus cuneatus (laterally)
Relay discriminative touch
Vibratory
Position
Light touch

19

Lateral funiculus

Lateral corticospinal
Rubrospinal
Dorsal spinocerebellar
Lateral spinothalamic
Ventral spinocerebellar