Bulbar reticular neurons relaying somatosensory information to the mesencephalic parabrachial area of the cat

Haruhide Hayashi, Takashi Toda, Takayoshi Tabata

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Somatosensory neurons projecting to the mesencephalic parabrachial area (MPBA), which is located ventral to the inferior colliculus and dorsal to the brachium conjunctivum, were recorded from the bulbar reticular formation of adult cats anesthetized with a α-chloralose. The majority (41 of 50 neurons) were nociceptive-specific neurons responding only to noxious mechanical and/or thermal stimuli to the skin, cornea and/or oral mucosa. The size of their receptive fields was smaller than that of the intrinsic MPBA-neurons, but larger than that of the trigeminal sensory nucleus neurons. Twenty-three neurons received input from the tooth pulp nerve and 10 of 32 neurons tested responded to electrical stimulation of the vagal nerve. These results indicate that these bulbar reticular neurons receive noxious inputs and transmit them to the MPBA, which also receives input from spinal or trigeminal sensory nucleus projecting directly to the MPBA.

Original languageEnglish
Pages (from-to)329-332
Number of pages4
JournalBrain research
Volume574
Issue number1-2
DOIs
Publication statusPublished - 1992 Mar 6

Keywords

  • Bulbar reticular neuron
  • Mesencephalon
  • Nucleus cuneiformis
  • Pain
  • Parabrachial area
  • Pulpal nerve
  • Spinal trigeminal nucleus

ASJC Scopus subject areas

  • Neuroscience(all)
  • Molecular Biology
  • Clinical Neurology
  • Developmental Biology

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