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Titolo:
ACETYLCHOLINE MODULATES GANGLION-CELL ACTIVITY IN THE TROUT PINEAL ORGAN
Autore:
BRANDSTATTER R; FAIT E; HERMANN A;
Indirizzi:
SALZBURG UNIV,INST ZOOL,DEPT ANIM PHYSIOL,HELLBRUNNERSTR 34 A-5020 SALZBURG AUSTRIA
Titolo Testata:
NeuroReport
fascicolo: 11, volume: 6, anno: 1995,
pagine: 1553 - 1556
SICI:
0959-4965(1995)6:11<1553:AMGAIT>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
CYPRINIDAE; TELEOST; NEURONS;
Keywords:
ACHROMATIC NEURONS; ELECTROPHYSIOLOGY; EPIPHYSIS CEREBRI, ONCORHYNCHUS MYKISS, RAINBOW TROUT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
14
Recensione:
Indirizzi per estratti:
Citazione:
R. Brandstatter et al., "ACETYLCHOLINE MODULATES GANGLION-CELL ACTIVITY IN THE TROUT PINEAL ORGAN", NeuroReport, 6(11), 1995, pp. 1553-1556

Abstract

IN the teleost pineal organ light activates functional photoreceptors, which transmit electrical activity to the brain via axons of intermediate ganglion cells. To investigate whether acetylcholine plays a role in the transduction of pineal photoreceptor signals, extracellular recordings were performed from ganglion cells of intact superfused pineal organs of the rainbow trout. Bath-applied acetylcholine increased the spike discharge rate of 96% of achromatic ganglion cells in a dose-dependent manner. The light response curve of ganglion cells, which was obtained by plotting spike rate vs light intensity, was significantly shifted by acetylcholine to higher frequencies. Acetylcholine was also active if applied during synaptic blockade with low Ca2+/high Mg2+-medium, demonstrating the presence of cholinergic receptors at the ganglion cell level. These data represent the first demonstration of acetylcholine constituting a postsynaptic modulation of photoreceptor signals in the trout pineal organ.

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Documento generato il 02/12/20 alle ore 15:11:55