[The synaptic changes in the structures of the hyperstriatal section of the chicken brain during imprinting, visual deprivation and intermittent photic stimulation].
Morphometric analysis of synapses was conducted in medial areas of the ventral and accessory hyperstriatum in the right and left hemispheres of chickens brain after: 1) rhythmic optical stimulation beginning from the 18-th day of incubation, 2) presentation of flashing stimuli on the 10-12-th hours of life, 3) keeping under constant illumination in the first day or 4) in darkness during 24 hours after hatching. On electronograms of ultrathin slices parameters were recorded of synapses numerical density, mean length and width of postsynaptic condensations, number of synaptic vesicles per active zone in the presynapse and mean length of the whole axodendrite contact. The results of the studies have shown that early visual experience leads to significant changes of synaptic complex in the studied brain regions. Plasticity of synapses is discussed during stimulation and morphofunctional interrelations between hyperstriatal areas which are connected with different aspects of processing and storage of the visual information.
Petrova
L P
LP
D000375:Aging / Q000502:physiology; D000818:Animals; D002645:Chickens / Q000502:physiology*; D003342:Corpus Striatum / Q000502:physiology* / Q000648:ultrastructure; D007173:Imprinting, Psychological / Q000502:physiology*; D008854:Microscopy, Electron; D010775:Photic Stimulation; D012683:Sensory Deprivation / Q000502:physiology*; D013569:Synapses / Q000502:physiology* / Q000648:ultrastructure; D013572:Synaptic Vesicles / Q000502:physiology / Q000648:ultrastructure; D014785:Vision, Ocular / Q000502:physiology*
Sinapticheskie izmeneniia v strukturakh giperstriatal'nogo otdela mozga tsyplenka pri imprintinge, zritel'noĭ deprivatsii i svetovoĭ preryvistoĭ stimuliatsii.