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Titolo:
Developmental changes in trial-to-trial variations in whisker barrel responses studied using intrinsic optical imaging: Comparison between normal andde-whiskered rats
Autore:
Yazawa, I; Sasaki, S; Mochida, H; Kamino, K; Momose-Sato, Y; Sato, K;
Indirizzi:
Tokyo Med & Dent Univ, Grad Sch, Dept Physiol, Bunkyo Ku, Tokyo 1138519, Japan Tokyo Med & Dent Univ Tokyo Japan 1138519 unkyo Ku, Tokyo 1138519, Japan Tokyo Med & Dent Univ, Fac Med, Bunkyo Ku, Tokyo 1138519, Japan Tokyo Med & Dent Univ Tokyo Japan 1138519 unkyo Ku, Tokyo 1138519, Japan Hayashibara Biochem Labs, Okayama 7010221, Japan Hayashibara Biochem LabsOkayama Japan 7010221 s, Okayama 7010221, Japan JAIC Coll Med Care & Welf Technol, Fukushima 9638834, Japan JAIC Coll Med Care & Welf Technol Fukushima Japan 9638834 9638834, Japan
Titolo Testata:
JOURNAL OF NEUROPHYSIOLOGY
fascicolo: 1, volume: 86, anno: 2001,
pagine: 392 - 401
SICI:
0022-3077(200107)86:1<392:DCITVI>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
BRAIN-STEM SLICES; SOMATOSENSORY CORTEX; FUNCTIONAL REPRESENTATIONS; ELECTRICAL-ACTIVITY; NEURONAL-ACTIVITY; NERVE-TERMINALS; LAYER-IV; PLASTICITY; EXPERIENCE; SIGNALS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Sato, K Tokyo Med & Dent Univ, Grad Sch, Dept Physiol, Bunkyo Ku, 1-5-45 Yushima, Tokyo 1138519, Japan Tokyo Med & Dent Univ 1-5-45 Yushima Tokyo Japan 1138519 9, Japan
Citazione:
I. Yazawa et al., "Developmental changes in trial-to-trial variations in whisker barrel responses studied using intrinsic optical imaging: Comparison between normal andde-whiskered rats", J NEUROPHYS, 86(1), 2001, pp. 392-401

Abstract

We used an intrinsic optical imaging technique to examine postnatal developmental changes in the rat barrel response to a single whisker movement. Wecompared the optical response patterns between control and de-whiskered rats, from which whiskers were removed except for the D1 whisker just after birth. Barrel responses were evoked by D1-whisker movement stimulation, and the intrinsic optical signals were detected from the somatosensory cortex through the dura mater. In the control rats, the area of the barrel responsedecreased gradually as postnatal development proceeded from 2 to 7 wk, until reaching the adult pattern. On the other hand, in the de-whiskered rats,the barrel response area did not change during development and showed a larger size than in the control rats. We also compared the trial-to-trial variations in the barrel responses between the two groups. In the control rats, trial-to-trial variations in the optical responses were observed under the same conditions of whisker stimulation, and the extent of the variations decreased with postnatal development up to 7 wk. In the de-whiskered rats, trial-to-trial variations were also observed, but the extent was larger andunchanged during development. In both groups, the positions of the response area were the same with respect to the bregma. These results suggest thatthe decrease in the area and variations in the optical responses are caused by interactions of the corresponding whisker barrel with neighboring barrels and that these interactions are necessary for the developmental stabilization of the intracortical horizontal connections, which are widespread and have high plasticity in early postnatal periods.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 12:09:23