The electric lobes of the electric ray (Torpedo marmorata) are innervated by GABAergic fibres: immunocytochemical evidence for dual innervation of electromotoneurons.
Neurosci Lett
; 201(2): 171-4, 1995 Dec 08.
Article
em En
| MEDLINE
| ID: mdl-8848245
ABSTRACT
It is currently thought that the electric lobes of electric rays are innervated by a single neuronal system, the oval nucleus system. In the work reported here, the innervation of the electric lobes was studied with silver staining methods, acetylcholinesterase histochemistry and gamma-aminobutyric acid (GABA) immunocytochemistry. Two types of axon were observed in the lobes thick GABA-immunonegative fibres, which originated from the oval nucleus, and thin GABAergic fibres of unknown origin, here reported for the first time. Electromotoneurons were strongly acetylcholinesterase-positive. Non-GABAergic and non-cholinergic neurons were observed in the oval nucleus, which is innervated by GABA-immunoreactive fibres. These results suggest that GABA may modulate electric discharge both directly, by GABAergic fibres that project to the lobes, and indirectly, by GABAergic fibres that project to the oval nucleus.
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Base de dados:
MEDLINE
Assunto principal:
Torpedo
/
Órgão Elétrico
/
Ácido gama-Aminobutírico
/
Neurônios Motores
/
Fibras Nervosas
Limite:
Animals
Idioma:
En
Revista:
Neurosci Lett
Ano de publicação:
1995
Tipo de documento:
Article
País de afiliação:
Espanha