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Titolo:
OPTICAL MAPPING OF NEURAL RESPONSES IN THE EMBRYONIC RAT BRAIN-STEM WITH REFERENCE TO THE EARLY FUNCTIONAL-ORGANIZATION OF VAGAL NUCLEI
Autore:
SATO K; MOMOSESATO Y; HIROTA A; SAKAI T; KAMINO K;
Indirizzi:
TOKYO MED & DENT UNIV,SCH MED,DEPT PHYSIOL,BUNKYO KU,1-5-45 YUSHIMA TOKYO 113 JAPAN TOKYO MED & DENT UNIV,SCH MED,DEPT PHYSIOL,BUNKYO KU TOKYO 113 JAPAN
Titolo Testata:
The Journal of neuroscience
fascicolo: 4, volume: 18, anno: 1998,
pagine: 1345 - 1362
SICI:
0270-6474(1998)18:4<1345:OMONRI>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
VOLTAGE-SENSITIVE DYES; ELECTRICAL-ACTIVITY; NERVE-TERMINALS; POSTSYNAPTIC POTENTIALS; NEURONAL-ACTIVITY; STEM; STIMULATION; COMPONENTS; PATTERNS; SLICES;
Keywords:
OPTICAL MAPPING; BRAIN-STEM; VAGAL NUCLEI; DEVELOPMENT; SYNAPTIC ACTIVITY; VOLTAGE-SENSITIVE DYE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
34
Recensione:
Indirizzi per estratti:
Citazione:
K. Sato et al., "OPTICAL MAPPING OF NEURAL RESPONSES IN THE EMBRYONIC RAT BRAIN-STEM WITH REFERENCE TO THE EARLY FUNCTIONAL-ORGANIZATION OF VAGAL NUCLEI", The Journal of neuroscience, 18(4), 1998, pp. 1345-1362

Abstract

We examined the functional organization of the vagal nuclei of the rat embryo during morphogenesis, using multiple-site optical recording with a voltage-sensitive dye, Slice preparations with vagus nerve fibers were dissected from 13- to 16-d-old embryonic (E13-E16) rat brainstems, and they were stained with the dye. Electrical activity in response to vagal stimulation was recorded optically from many sites, In the E13-E14 preparations, two types of spike-like optical signals were recorded: one was a narrow signal (type I), and the other was a broader signal (type II). Comparison with the morphology revealed by Dil labeling suggests that the type I signal response area corresponds to the nucleus of the tractus solitarius, and the type II signal response area corresponds to the dorsal motor nucleus of the vagus nerve. In the E15-E16 preparations, type I signals were followed by a slow signal related to glutamate-mediated excitatory postsynaptic potentials, suggesting that synaptic function is organized in the nucleus of the tractus solitarius by the l5-d-old embryonic stage. In the E14 preparation, a small, slow signal was evoked only in Mg2+-free solution, implying that postsynaptic function related to NMDA receptors emerges, in latent form, at the 14-d-old embryonic stage, In the E15 and E16 preparations, although the nucleus ambiguus is identified morphologically, no neural response-related optical signal was observed there, indicating that the embryonic organization of morphology and physiological function is not necessarily temporally coincident. We have mapped the dynamic spatiotemporal patterns of the evoked optical signals and have outlined theearly phase of the functional organization of the cranial nuclei related to the vagus.

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Documento generato il 08/04/20 alle ore 11:34:46