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The spinothalamic tract.

C J Hodge1, A V Apkarian

  • 1Department of Neurosurgery, SUNY Health Science Center, Syracuse.

Critical Reviews in Neurobiology
|January 1, 1990
PubMed
Summary
This summary is machine-generated.

The spinothalamic tract (STT) has diverse neuron groups in the spinal cord projecting to the thalamus. Different STT cell groups may process distinct aspects of pain perception, from sensory discrimination to aversion.

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Area of Science:

  • Neuroscience
  • Spinal Cord Anatomy
  • Pain Pathways

Background:

  • The spinothalamic tract (STT) is a crucial ascending pathway for pain and temperature sensation.
  • It originates from spinal cord neurons and projects to various thalamic nuclei.
  • Understanding the functional organization of the STT is key to understanding pain processing.

Purpose of the Study:

  • To delineate the functional organization of spinothalamic tract (STT) neurons.
  • To correlate specific STT cell groups with distinct roles in pain perception.
  • To investigate the projection patterns of different STT neuron populations to the thalamus.

Main Methods:

  • Analysis of neuronal origins and receptive fields within the spinal cord grey matter.
  • Tracing axonal projections from spinal cord neurons to thalamic nuclei.

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  • Functional characterization of STT neurons based on stimulus response and receptive field properties.

    • Main Results:

    • Identified three functional groups of STT neurons in the spinal cord (laminae 1, 4-6, and 7-10).
    • Demonstrated differential projections to thalamic nuclei (lateral, intralaminar, medial) based on cell location.
    • Observed unique projections from lamina 1 cells to the nucleus submedius.

    Conclusions:

    • Hypothesize that superficial STT cells (lamina 1) are involved in the sensory-discriminative aspects of pain.
    • Hypothesize that deeper STT cells (laminae 7-10) contribute to the aversive aspects of pain.
    • The diverse organization of the STT supports differential processing of pain information in the brain.