Aging changes in the optic tectum of the guppy Poecilia (Lebistes) reticulatus.
Exp Gerontol
; 19(5): 305-11, 1984.
Article
en En
| MEDLINE
| ID: mdl-6510475
Histological surveys of the brains of guppies throughout their lifespan showed no overall loss of tissue with advancing age. Brain and body increased in size at a similar rate throughout adult life in male fish. In old females after the age of two years, brain growth apparently ceased, although body growth continued at a low rate. In both sexes there was a loss of neurones from the stratum griseum periventriculare in the midbrain roof in old age; the decrease in size was significant. The midbrain is a major correlative center concerned with spatial orientation. How far neuronal loss may contribute to functional behavioral disorder in old age is unknown, but a loss of orientation could render the older fish more susceptible to predation.
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Base de datos:
MEDLINE
Asunto principal:
Colículos Superiores
Límite:
Animals
Idioma:
En
Revista:
Exp Gerontol
Año:
1984
Tipo del documento:
Article
Pais de publicación:
Reino Unido