Abstract:
:We investigated the effects of aging on the neuroanatomical sex dimorphisms of the rat hypothalamic ventromedial nucleus (VMN). Stereological methods were used to estimate the volume of the VMN and the total number and size of its neurons, including their dendritic trees, in males and females aged 6 and 24 months. No cell loss was detected in aged rats. However, in aged females, the volume of the VMN and the somatic size of its neurons were increased, whereas in aged males the dendritic spine density was augmented. Due to these gender-specific effects, the male-female differences observed in the morphology of the VMN in adult rats were annulled in aging. Our findings support the notion that some structural sex dimorphisms in the brain are not stable throughout the life span.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Madeira MD,Ferreira-Silva L,Ruela C,Paula-Barbosa MMdoi
10.1016/s0304-3940(01)02294-7keywords:
subject
Has Abstractpub_date
2001-11-13 00:00:00pages
73-6issue
1-2eissn
0304-3940issn
1872-7972pii
S0304394001022947journal_volume
314pub_type
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