ANAT 321 Lecture Notes - Lecture 4: Lamellar Corpuscle, Bulbous Corpuscle, Sensory Neuron
6 Nov 2020
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Document Summary
Last time, we started talking about the dorsal column lemniscal pathway (fine touch and proprioception) and the anterolateral pathway (pain and temperature) These two pathways follow 2 different roots from the periphery (the skin) up to the cerebral cortex. Transduction is the idea that there has to be a transformation of the sensory information into the common currency of the nervous system which is action potentials. Action potentials are the medium of information transferred in the nervous system. In the context of the somatic sensory system, it"s easier to understand. In the somatic sensory system, we have all these different kinds of axons that innervate the skin surface. Each different kind of axon has specialized endings that enable it to extract particular kind of somatic sensory information and exclude others. of labeled lines. For example, pacinian corpuscles are sensitive to high frequency vibrations whereas. All over the palm of hands and feet there are these pacinian corpuscles.
