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Título

Periaqueductal gray neurons' activity in a mesencephalic slice preparation

AutorSánchez, Diego; Ganfornina, M. D. ; Ribas, J.
Palabras clavePeriaqueductal gray
Electrophysiology
Mesencephalic slice
Intracellular recording
Fecha de publicación1988
EditorElsevier
CitaciónBrain Research 455(1): 166-169 (1988)
ResumenThe electrophysiological characteristics of periaqueductal gray (PAG) neurons were studied using intracellular techniques in guinea pig brainstem slices maintained ‘in vitro’. Input resistance and time constant ranged between 60–110 MΩ and 11–20 ms respectively. Direct activation elicited action potentials generated by a Na+-conductance and characterized by a remarkable Ca2+-dependent plateau in the falling phase and a long-lasting afterhyperpolarization which is probably due to a Ca2+-dependent K+-conductance. These cells also showed a slow return to the resting membrane potential after hyperpolarizing pulses which was Ca2+-dependent. All PAG neurons had a low resting membrane potential and displayed a tonic spontaneous firing at a frequency around 7 impulses/s.
URIhttp://hdl.handle.net/10261/122916
DOI10.1016/0006-8993(88)90128-X
ISSN0006-8993
E-ISSN1872-6240
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