[A quantitative morphological study of the effect of partial visual deprivation on the formation of 2 types of Wulst neurons in pied flycatcher nestlings].
Neurons of the Wulst area (analogous to mammalian visual cortex) were studied with the method of computerized morphometry (6 parameters) in frontal Golgi-stained sections of pied flycatcher nestlings which were binocularly deprived since the age of 1-1.5 days post-hatching. The current study was focused on two types of neurons: spiny stellate and small spineless stellate-like cells. It was found that the visual deprivation not only slowed down the morphogenesis of these neurons but also caused the constructive changes--increase in the number of foci of maximal dendrite branching--in spiny stellate neurons which we had earlier defined as projective cells. Changes in small spineless stellate-like neurons (earlier defined as intercalate cells) were of, mostly, opposite direction. In the latter neurons we observed a reduction of the number of dendrites and dendrite branches. Opposite changes in different cell groups caused by the limitation of sensory input may, on the one hand, point to a difference in functional connections of ascending afferent fibers with different types of neurons, and, on the other hand, indicate a different degree of the influence of visual experience on the development of these neurons.
Korneeva
E V
EV
Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow.
D000818:Animals; D001717:Birds / Q000502:physiology*; D009474:Neurons / Q000145:classification / Q000166:cytology* / Q000502:physiology; D012683:Sensory Deprivation / Q000502:physiology*; D015348:Vision, Binocular / Q000502:physiology*; D014793:Visual Cortex / Q000166:cytology* / Q000502:physiology
Kolichestvennoe morfologicheskoe issledovanie vliianiia chastichnoĭ zritel'noĭ deprivatsii na formirovanie dvukh vidov neĭronov Wulst ptentsov mukholovki-pestrushki.