Flashcards in Spinal Cord and Periphery Deck (21)
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1
Where do the axons of the sensory files enter the spinal cord?
Dorsal root
2
Where are the cell bodies of motor neurons located?
Ventral horn
3
What is white matter comprised of?
Myelinated axons (bundles of tracts)
4
What is grey matter comprised of?
Cell bodies
5
What is motor neuron disease?
Group of diseases affecting the motor neuron in the central horn of spinal cord
Neuron dies causing muscle atrophy
6
What are the 3 columns of white matter?
Posterior
Lateral
Anterior
7
What type of information do ascending spinal tracts carry?
Sensory
8
How many neurons are there between peripheral receptor and cortex?
3
9
Where are the synapses of the ascending spinal tracts
Medulla (crosses over here)
Contralateral thalamus
10
What is the posterior column responsible for?
Fine touch
Tactile localisation
Vibration sense
Proprioception
11
What is the lateral spinothalamic tracts responsible for?
Pain
Temperature
12
Where do the descending tracts of the spinal cord originate?
Cerebral cortex and brainstem
13
What is the role of the descending tracts?
Control of movement
Muscle tone
Spinal autonomic functions
14
What is the pyramidal tract responsible for?
Control of voluntary skilled movements
15
Where do the corticospinal fibres cross over?
Pyramids
16
What is a reflex?
Involuntary stereotyped pattern of response brought about by a sensory stimulus
17
Where are reflexes mediated?
Level of the spinal cord
18
What is the role of the flexor reflex?
Helps protect the body from painful stimuli
19
What are the consequences of an upper motor neuron lesion?
Hypertonicity
Spastic paralysis with hyperreflexia
20
What is the role of the autonomic nervous system?
Innervation and control of visceral organs, smooth muscle and secretory glands
21
