Age-variant and age-invariant rhythmicities in the cortical and hippocampal electrical activities of neonatal rats
The neocortical and hippocampal electrical activities were studied in 8, 15, 22, and 29-day-old rats. Segments of EEG recorded for 4 hours were analyzed by means of fast Fourier transformation. The sleep-wake activity stages were determined. The developments in the neocortical and hippocampal EEG ac...
Elmentve itt :
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| Dokumentumtípus: | Cikk |
| Megjelent: |
1992
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| Sorozat: | CHRONOBIOLOGIA
19 No. 3-4 |
| Tárgyszavak: | |
| mtmt: | 1341013 |
| Online Access: | http://publicatio.bibl.u-szeged.hu/32218 |
| Tartalmi kivonat: | The neocortical and hippocampal electrical activities were studied in 8, 15, 22, and 29-day-old rats. Segments of EEG recorded for 4 hours were analyzed by means of fast Fourier transformation. The sleep-wake activity stages were determined. The developments in the neocortical and hippocampal EEG activities were characterized by the gradual appearance of adult-like EEG waves and a shift towards higher frequencies in the theta wave range of the hippocampal electrical activity. The power value in the theta range, however, exhibited age-invariant rhythmicities with cycle lengths of about 9.5-11 and 16-22 min. The manifestation of such an age-invariant rhythm can be interpreted as an electrical manifestation of the rest-activity cycle originally described by KLEITMAN25. |
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| Terjedelem/Fizikai jellemzők: | 163-173 |
| ISSN: | 0390-0037 |