Respiratory interneurons in the C5 segment of the spinal cord of the cat

Bellingham, MC and Lipski, J (1990) Respiratory interneurons in the C5 segment of the spinal cord of the cat. Brain Research, 533 1: 141-146. doi:10.1016/0006-8993(90)91807-S

Author Bellingham, MC
Lipski, J
Title Respiratory interneurons in the C5 segment of the spinal cord of the cat
Journal name Brain Research   Check publisher's open access policy
ISSN 0006-8993
Publication date 1990-11-12
Year available 1990
Sub-type Article (original research)
DOI 10.1016/0006-8993(90)91807-S
Open Access Status Not yet assessed
Volume 533
Issue 1
Start page 141
End page 146
Total pages 6
Place of publication AMSTERDAM
Language eng
Subject 1309 Developmental Biology
1312 Molecular Biology
2728 Clinical Neurology
2800 Neuroscience
Abstract Extracellular recordings were made in the C5 segment of the spinal cord of anaesthetised cats from 129 units which showed respiratory phased discharge. The majority of recordings (88%) were thought to arise from the somata of respiratory spinal interneurons. Inspiratory units and expiratory units comprised 42% and 52% of all recorded units. A small number of postinspiratory units were also found (n = 5). Most units did not respond to electrical stimulation of the ipsilateral superior laryngeal (SLN) and phrenic nerves (PN), but a few expiratory (n = 2) and postinspiratory units (n = 1) were excited by SLN stimulation, while 6 inspiratory units had their discharge suppresed by the same stimulus. PN stimulation evoked a long latency (2-7 ms) burst of firing in 2 inspiratory and 1 expiratory interneurons. It is concluded that these respiratory interneurons may provide a segmental input to phrenic motoneurons, in addition to synaptic drives mediated by bulbospinal pathways.
Keyword Cat
Phrenic motoneuron
Spinal cord
Superior laryngeal nerve
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
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