The Spinal Cord and Periphery Flashcards
the axons of sensory fibres enter through which horn?
dorsal horn of grey matter
motor neurones have their cell bodies in which horn?
ventral horn
ascending spinal tracts carry what information, and to where?
Carries sensory information to the brain (cerebral cortex and cerebellum)
when do the sensory neurones cross over to contralateral side?
at medulla
when do the pain and temp neurones cross over to contralateral side?
at level of entry to reach lateral column in spinal cord
what does the Lateral spinothalamic tract of Right side carry?
Pain and temperature from Left side of body
what does the Posterior column of Right side carry?
Touch, pressure, proprioception from Right side of body
descending spinal tracts carry what information, and from where?
Carries motor information from the brain (cerebral cortex and brainstem)
what are the motor neurones concerned with?
control of movement, muscle tone, spinal autonomic functions
when do the motor neurones cross over to contralateral side?
at medulla
what is the motor neuron tract called?
corticospinal/pyramidal tract
where is the lower motor neurone found?
spinal cord
what is the lower motor neurone responsible for?
muscle tone and reflexes
where is the upper motor neurone found?
primary motor cortex
what occurs if the upper motor neuron is damaged but the LMN is intact?
reflexes and tone are exaggerated
The muscle tone also increases leads to spasticity
