Sensory and Motor Pathways PDF
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This document discusses sensory and motor pathways in the human body. It covers topics such as ascending and descending pathways, decussation, and different types of sensory pathways. The document also describes the anterior spinothalamic tract.
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Sensory and Motor Pathways Sensory pathways Acsending pathways carry sensory information Motor pathways Descending pathways carry motor commands Decussation Cross-over of pathways to the other side of the brain Ipsilateral: pathway does not cross over Contralateral: pathway crosses over S...
Sensory and Motor Pathways Sensory pathways Acsending pathways carry sensory information Motor pathways Descending pathways carry motor commands Decussation Cross-over of pathways to the other side of the brain Ipsilateral: pathway does not cross over Contralateral: pathway crosses over Somatic sensory pathways somatic sensory pathways consist of a series of neurons called the labeled line. 1st order neuron - receptor up to brainstem or spinal cord 2nd order neuron - runs from brainstem or spinal cord to thalamus 3rd order neuron - thalamus to sensory cortex collectively, these neurons are known as a labeled line Usually named for their origin or termination Sensory pathways Conscious awareness: sensations we are consciously aware of Anterior spinothalamic tract information transmitted: crude touch and pressure, itch and tickle ipsilateral or contralateral: contralateral destination: cerebral cortex
