Spinal Cord and Periphery Flashcards Preview

Neurology > Spinal Cord and Periphery > Flashcards

Flashcards in Spinal Cord and Periphery Deck (21)
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1
Q

Where do the axons of the sensory files enter the spinal cord?

A

Dorsal root

2
Q

Where are the cell bodies of motor neurons located?

A

Ventral horn

3
Q

What is white matter comprised of?

A

Myelinated axons (bundles of tracts)

4
Q

What is grey matter comprised of?

A

Cell bodies

5
Q

What is motor neuron disease?

A

Group of diseases affecting the motor neuron in the central horn of spinal cord
Neuron dies causing muscle atrophy

6
Q

What are the 3 columns of white matter?

A

Posterior
Lateral
Anterior

7
Q

What type of information do ascending spinal tracts carry?

A

Sensory

8
Q

How many neurons are there between peripheral receptor and cortex?

A

3

9
Q

Where are the synapses of the ascending spinal tracts

A

Medulla (crosses over here)

Contralateral thalamus

10
Q

What is the posterior column responsible for?

A

Fine touch
Tactile localisation
Vibration sense
Proprioception

11
Q

What is the lateral spinothalamic tracts responsible for?

A

Pain

Temperature

12
Q

Where do the descending tracts of the spinal cord originate?

A

Cerebral cortex and brainstem

13
Q

What is the role of the descending tracts?

A

Control of movement
Muscle tone
Spinal autonomic functions

14
Q

What is the pyramidal tract responsible for?

A

Control of voluntary skilled movements

15
Q

Where do the corticospinal fibres cross over?

A

Pyramids

16
Q

What is a reflex?

A

Involuntary stereotyped pattern of response brought about by a sensory stimulus

17
Q

Where are reflexes mediated?

A

Level of the spinal cord

18
Q

What is the role of the flexor reflex?

A

Helps protect the body from painful stimuli

19
Q

What are the consequences of an upper motor neuron lesion?

A

Hypertonicity

Spastic paralysis with hyperreflexia

20
Q

What is the role of the autonomic nervous system?

A

Innervation and control of visceral organs, smooth muscle and secretory glands

21
Q

What type of control is the autonomic nervous system under?

A

Involuntary