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| • | Physical stimuli
= mechanical, thermal, and |
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| chemical energy
coming in contact with the skin |
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| • | Pathway: Sensory
receptors -> the spinal |
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| cord ->
brainstem -> thalamus -> |
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| somatosensory
cortex (parietal lobe) |
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| • | Sensory
receptors specialized to some degree |
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| for different
functions, such as pressure, heat, |
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| cold, etc. |
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| • | Pain receptors:
free nerve endings |
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| – | Two pain
pathways: fast vs. slow |
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| – | Gate-control
theory |
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