[Eruption of neuronal activity in selected structures of the mammalian brain].
Slow bursting activity of the cells in the hypothalamus of the mammalian brain is described, with a special emphasis on the vasopressinergic neurons of the supraoptic and paraventricular nuclei (SON/PVN). This patterned activity is compared to the one observed in the thalamic structure--the intergeniculate leaflet of the lateral geniculat nucleus (IGL). Histograms of activity, bimodal distributions of the frequencies, averaged bursts and a few other characteristic properties of the oscillatory activity observed in SON/PVN and IGL are shown. Slow bursting activity of the intergeniculate leaflet cells is suggested to have a same function as has patterned firing of hypothalamic cells. Peptidergic contents of IGL cells, possibly attenuated blood-brain barrier in the area of this structure and its role in the adjustment of the circadian rhythms are some of the arguments to support this hypothesis.
Błasiak
Tomasz
T
Zakładu Fizjologii Zwierzat, Instytut Zoologii, Uniwersytet Jagielloński. blask@zuk.iz.uj.edu.pl
D000200:Action Potentials / Q000502:physiology; D000818:Animals; D001812:Blood-Brain Barrier / Q000502:physiology; D002940:Circadian Rhythm / Q000502:physiology; D005829:Geniculate Bodies / Q000502:physiology; D007031:Hypothalamus / Q000502:physiology*; D008322:Mammals; D009474:Neurons / Q000502:physiology*; D010286:Paraventricular Hypothalamic Nucleus / Q000502:physiology; D013495:Supraoptic Nucleus / Q000502:physiology; D014667:Vasopressins / Q000378:metabolism
D014667:Vasopressins