Flashcards in Spinal Cord and Periphery Deck (21)
Where do the axons of the sensory files enter the spinal cord?
Where are the cell bodies of motor neurons located?
What is white matter comprised of?
Myelinated axons (bundles of tracts)
What is grey matter comprised of?
What is motor neuron disease?
Group of diseases affecting the motor neuron in the central horn of spinal cord
Neuron dies causing muscle atrophy
What are the 3 columns of white matter?
What type of information do ascending spinal tracts carry?
How many neurons are there between peripheral receptor and cortex?
Where are the synapses of the ascending spinal tracts
Medulla (crosses over here)
What is the posterior column responsible for?
What is the lateral spinothalamic tracts responsible for?
Where do the descending tracts of the spinal cord originate?
Cerebral cortex and brainstem
What is the role of the descending tracts?
Control of movement
Spinal autonomic functions
What is the pyramidal tract responsible for?
Control of voluntary skilled movements
Where do the corticospinal fibres cross over?
What is a reflex?
Involuntary stereotyped pattern of response brought about by a sensory stimulus
Where are reflexes mediated?
Level of the spinal cord
What is the role of the flexor reflex?
Helps protect the body from painful stimuli
What are the consequences of an upper motor neuron lesion?
Spastic paralysis with hyperreflexia
What is the role of the autonomic nervous system?
Innervation and control of visceral organs, smooth muscle and secretory glands