L19: Overview Of Central Sensory And Motor Systems Flashcards
What is the anatomical classification of the nervous system
CNS
PNS
What is the functional classification of the central nervous system
Somatic NS
Autonomic NS
What are the 3 somatic afferent subtypes
Latospinal thalamic tract
Dorsal column
Dorsal spinal cerebella tract
What are the 2 somatic efferent subtypes
Pyramidal
Extrapyramidal
What is the cerebral cortex divisible into
Sensory and motor brain
What is the motor and sensory brain seperated by
Central sulcus
What is a sulcus
A depression in the brain
Where does sensory info occur at the cerebral cortex
Post- central gyrus
What takes the sensory information from the spinal cord to brain
Sensory fibres
According to the sensory information being carried from the spinal cord to the brain what does the sensory fibres have
Subtypes
What are the sensory fibres
Dorsal column
Spinothalamic tract
Dorsal cerebellar tract
What are the 2 categories of sensations
Conscious sensation
Non-conscious sensation
What does the conscious sensation involve
Pain
Temp
Crude touch
What does non conscious sensation involve
Tactile sensation Pain Joint position Muscle length Tension
What happens to the primary sensory neurone when it reaches the spinal cord
Terminate into the dorsal horn by either its:
Respective segment
Above spinal segment
Below spinal segment
Where does the second order sensory neurone pick up a signal from the first neurone
Before crossing the midline on the spinal cord
Where does the second order sensory neurone ascend to and how
To the opposite side and to the medulla oblongata then thalamus
Where does the third order sensory neurone pick up sensory information from the second order sensory neurone
In the thalamus
Where does the third order sensory neurone ascend to and terminate at
Ascends and terminates at the post-central gyrus
For pain and temperature what tract carries it
Spinothalamic tract
What carries propioceptive information
Dorsal column
What happens when sensory neurones arrive into the post central gyrus
They terminate into the respectable areas mapping the origin of site of body
What is syringomyelia
A condition when the spinal canal with fluid forms a cyst
What can the cyst in the spinal canal cause
A cut out in all sensation from the pain system
Where can the cyst expand to
Ventral horn or all over the spinal cord
What is the role of the pre-central gyrus
Issues motor commands to the muscle
What are the 2 descending systems
Pyramidal
Extra pyramidal
How does the extrapyramidal system descend
From: Cerebral cortex To: Thalamus Basal ganglia Spinal Cord
How does the pyramidal system descend
From cerebral cortex to spinal cord
