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Ascending Neural Pathways

  • Donald W. Pfaff

Abstract

To see whether connections between the spinal cord posterior to thoracic levels and supraspinal structures are required for lordosis, hormone-primed female rats were studied before and after complete transection of the spinal cord at low thoracic levels. All sham-operated rats showed strong lordosis reflexes before and after surgery. None of the rats receiving complete spinal transections performed lordosis after surgery, even in tests done 3 months and more after transection (Kow, Montgomery, and Pfaff, 1977). Even pharmacological attempts to facilitate lordosis failed to bring out the reflex in spinally transected hormone-primed female rats (Kow et al., 1980b). Thus, supraspinal control is required for the normal lordosis reflex. The net effect of this control must be facilitation of lordosis-relevant circuitry at segmental spinal levels.

Keywords

Dorsal Column Somatosensory Input Somatosensory Stimulus Lateral Reticular Nucleus Midbrain Neuron 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag New York Inc. 1980

Authors and Affiliations

  • Donald W. Pfaff
    • 1
  1. 1.The Rockefeller UniversityNew YorkUSA

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