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Motor Pathways - Anatomy & Physiology (view source)
Revision as of 15:02, 21 October 2011
, 15:02, 21 October 2011→Motor Pathways
==Motor Pathways==
==Motor Pathways==
The connections between the [[Forebrain_-_Anatomy_%26_Physiology#Motor_Cortex|motor cortex]] in the forebrain and motor neurons within the spinal cord are made up of two pyramidal tracts; the '''Pyramidal System''' and the '''Extrapyramidal System'''. These motor pathways are transmitted via ventral horns within the spine. Upper motor neurones are located mainly within the neopallium of the [[Hindbrain - Anatomy & Physiology#Cerebellum|cerebellum]]. They govern the excitation or inhibition of lower motor neurones.
The connections between the [[Forebrain_-_Anatomy_%26_Physiology#Motor_Cortex|motor cortex]] in the forebrain and motor neurons within the spinal cord are made up of two pyramidal tracts; the '''Pyramidal System''' and the '''Extrapyramidal System'''. These motor pathways are transmitted via ventral horns within the spine. Upper motor neurones are located mainly within the neopallium of the [[Hindbrain - Anatomy & Physiology#Cerebellum|cerebellum]]. They govern the excitation or inhibition of lower motor neurones.
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Stimulation of the motor neurons is as a result of activity within the cerebral cortex and/or thalamus. There is a balance between the excitatory and inhibitory inputs from these parts of the brain. The thalamus effectively acts as a relay station from the cerebrum and cerebellum before neurons lead into the motor pathways of the spine.
===Pyramidal System (Corticospinal)===
===Pyramidal System (Corticospinal)===
[[Image:pyramidalsystem.jpg|thumb|right|150px|Pyramidal System © Sarah Hamilton]]
[[Image:pyramidalsystem.jpg|thumb|right|150px|Pyramidal System © Sarah Hamilton]]