Definition
Postsynaptic dorsal column (PSDC) cells are second-order sensory relay neurons in the spinal cord. The PSDC cells receive cutaneous mechanical and/or noxious visceral information from primary afferent nerves in the periphery. The information is relayed by PSDC axons ascending uncrossed through the dorsal column that innervate the dorsal column nuclei in the caudal medulla. The largest numbers of PSDC cells are located in laminae III and IV, primarily transmitting information about innocuous cutaneous mechanical input. The PSDC cells located in medial laminae III–VII and X transmit information about noxious input received from afferent fibers innervating inflamed or distended visceral organs.
Characteristics
The traditional view of the dorsal column as solely a direct pathway for primary afferent fiber transmission of discriminative cutaneous and deep sensory...
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High, K.W. (2013). Postsynaptic Dorsal Column Projection, Anatomical Organization. In: Gebhart, G.F., Schmidt, R.F. (eds) Encyclopedia of Pain. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-28753-4_3475
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DOI: https://doi.org/10.1007/978-3-642-28753-4_3475
Publisher Name: Springer, Berlin, Heidelberg
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