[An ultrastructural analysis of synaptic plasticity during limitation of the sensory input].
Morphometric investigation of ultrastructural changes in synaptic connections within visual projection zone in the accessory hyperstriatum and associative part of the medial ventral hyperstriatum in chicks, kept in darkness within the first day after hatching, revealed reliable decrease in the number and area of active synaptic zones together with accumulation of synaptic vesicles in axonal plates. Compensatory processes in the investigated structures during normalization of the visual function at the second day after hatching in chicks consist of the increase in the mean area of contacts without significant increase in the relative number of postsynaptic dense bodies, which may indicate intensification of synaptic transmission.
Petrova
L P
LP
D000818:Animals; D002645:Chickens; D003624:Darkness; D008027:Light; D008854:Microscopy, Electron; D009473:Neuronal Plasticity / Q000502:physiology*; D012683:Sensory Deprivation / Q000502:physiology*; D013569:Synapses / Q000502:physiology / Q000648:ultrastructure*; D014793:Visual Cortex / Q000502:physiology / Q000648:ultrastructure
Ul'trastrukturnyĭ analiz plastichnosti sinapsov pri ogranichenii sensornogo pritoka.