Multi-phase expiratory inhibition of phrenic motoneurons in the decerebrate cat.
Neuroreport
; 3(4): 307-10, 1992 Apr.
Article
em En
| MEDLINE
| ID: mdl-1515587
ABSTRACT
We studied the membrane potential changes of 11 phrenic motoneurons (PMs), located in the C5 portion of the cervical spinal cord, in decerebrate, paralyzed and artificially ventilated cats. Intracellular chloride iontophoresis into PMs could reverse the waves of inhibitory postsynaptic potentials (IPSPs) causing membrane hyperpolarization during expiration. In all PMs, we revealed, in addition to the previously described late expiratory augmenting wave of IPSPs, an early expiratory decrementing wave of IPSPs. Moreover, in three PMs, recorded in two cats exhibiting slow respiratory rhythms, an additional wave of IPSPs was interposed between the early and late ones. The possible origins and roles of these three different waves of inhibition are discussed.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Nervo Frênico
/
Respiração
/
Neurônios Motores
Limite:
Animals
Idioma:
En
Revista:
Neuroreport
Assunto da revista:
NEUROLOGIA
Ano de publicação:
1992
Tipo de documento:
Article
País de afiliação:
França