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Responses of vestibular neurons to arginine vasopressin microinjection

Podda, M. V. and Deriu, Franca and Montella, Andrea Costantino Mario and Satta, Andrea Ercole and Tolu, Eusebio (1998) Responses of vestibular neurons to arginine vasopressin microinjection. Pflügers Archiv. European Journal of Physiology, Vol. 436 (6), p. 914-919. eISSN 1432-2013. Article.

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DOI: 10.1007/s004240050723

Abstract

The aim of the present research was to evaluate the effects induced by arginine vasopressin (VP) microinjection on the electrical activity of single vestibular neurons. Experiments were performed on anaesthetized guinea-pigs in which the spontaneous and the evoked electrical activity of vestibular neurons were recorded before and after intranuclear VP microinjection (0.25·10–5 pg VP in 0.25 µl NaCl 0.9% solution). Results showed that VP microinjection affects the spontaneous as well as the evoked vestibular neuron activity. More precisely, 60% of 30 tested neurons were inhibited, 30% were excited and the remaining 10% were unaffected by VP microinjection. The changes in neuronal activity reported above were attributed to a direct action exerted by the polypeptide on vestibular complex neurons. The possible role played by VP in the mechanisms of postural control exerted by the vestibular system was considered as well.

Item Type:Article
ID Code:1232
Status:Published
Refereed:Yes
Uncontrolled Keywords:Guinea pig, microinjection, postural control, vasopressin, vestibular nuclei
Subjects:Area 05 - Scienze biologiche > BIO/09 Fisiologia
Area 05 - Scienze biologiche > BIO/16 Anatomia umana
Area 06 - Scienze mediche > MED/09 Medicina interna
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze biomediche
001 Università di Sassari > 03 Istituti > Patologia speciale medica e metodologia clinica
Publisher:Springer Berlin / Heildelberg
eISSN:1432-2013
Deposited On:18 Aug 2009 10:04

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