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How Do You Feel?An Interoceptive Moment with Your Neurobiological Self$
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A. D. (Bud) Craig

Print publication date: 2014

Print ISBN-13: 9780691156767

Published to Princeton Scholarship Online: October 2017

DOI: 10.23943/princeton/9780691156767.001.0001

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The Origin of the Interoceptive Pathway

The Origin of the Interoceptive Pathway

Homeostatic Sensory Fibers and the Interoceptive Dorsal Horn

Chapter:
(p.54) 3 The Origin of the Interoceptive Pathway
Source:
How Do You Feel?
Author(s):

A. D. (Bud) Craig

Publisher:
Princeton University Press
DOI:10.23943/princeton/9780691156767.003.0003

This chapter describes the functional and anatomical characteristics of interoceptive processing at the levels of the primary sensory fiber and the spinal cord. The association of the spinothalamic pathway with pain and temperature had already been described in textbooks for years. The clinical evidence indicated that a knife cut that severed the spinal cord on one side produced a loss of pain and temperature sensations only on the opposite (contralateral) side of the body, as tested with pinprick and a cold brass rod, combined with the loss of discriminative touch sensation and skeletal motor function on the same (ipsilateral) side as the injury to the spinal cord. The anatomical basis for this dissociated pattern of sensory loss is the distinctness of the two ascending somatosensory pathways to the brain-discriminative touch sensation in the uncrossed (ipsilateral) dorsal column pathway, and pain and temperature sensations in the crossed (contralateral) spinothalamic pathway.

Keywords:   interoceptive processing, primary sensory fiber, spinal cord, spinothalamic pathway, discriminative touch sensation, skeletal motor function, sensory loss, somatosensory pathways, dorsal column pathway

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