Abstract:
:The purpose of the present study was to identify processes of plasticity in the receptive field of neurosecretory neurons of the supraoptic nucleus during hibernation in the hedgehog, in order to correlate them with the increased neurosecretory activity observed in this nucleus during this annual period. Using the Rapid Golgi method, a quantitative study was conducted in the receptive field of bipolar and multipolar neurons (the main components of the nucleus). Results indicate a generalized increase in the following characteristics: (1) number of dendritic spines per millimeter along the dendritic shafts; (2) degree of branching in the dendritic field; and (3) dendritic density around the neuronal soma. These data demonstrate modification of the dendritic field in the supraoptic nucleus during hibernation, a change undoubtedly related to functional conditions. Since the observed changes affect structures such as dendritic spines which are directly related to the arrival of neural afferences, the discussion is centered on the types of stimuli which may be responsible for the observed processes.
journal_name
Neurosciencejournal_title
Neuroscienceauthors
Sanchez-Toscano F,Caminero AA,Machin C,Abella Gdoi
10.1016/0306-4522(89)90396-5subject
Has Abstractpub_date
1989-01-01 00:00:00pages
543-50issue
2eissn
0306-4522issn
1873-7544pii
0306-4522(89)90396-5journal_volume
31pub_type
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