Cortical asymmetry--a preliminary study: neurons-glia, female-male.
Exp Neurol
; 99(2): 353-61, 1988 Feb.
Article
em En
| MEDLINE
| ID: mdl-3338528
ABSTRACT
Previous studies on human cortical area 39 suggested that neuronglial ratios differed between the sexes. These findings were the inspiration for the present investigation which dealt with neuronal and glial counts in area 39 in the male and female rat cerebral cortex. Transverse, celloidin or frozen sections, were cut from male and female brains (respectively) from 90-day-old Long-Evans rats. Neurons and glia were counted on enlarged photographs of stained sections, including area 39, with 35-mm Kodak Panatomic-X film using a Zeiss photomicroscope (X400). Five-by-three-inch prints were taped together in sequence to yield a 640X enlarged "montage" of area 39. Five cell types were differentiated with reference to a standard neurons, astrocytes, oligodendrocytes, "dark astrocytes," and unidentified glia. The data were analyzed with a two-way analysis of variance (ANOVA five cell types by two hemispheres). Student's t test and a paired t test were used when appropriate. The neuronglial ratios in the male rats were consistently higher than those in the females in both hemispheres. The male right side had 12% (P less than 0.05) more neurons than the left; the female had 13% (P less than 0.05) more neurons on the left than the right. Similar, but not identical, asymmetrical patterns were seen with the glial cells.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Córtex Cerebral
/
Neuroglia
/
Caracteres Sexuais
/
Neurônios
Limite:
Animals
Idioma:
En
Revista:
Exp Neurol
Ano de publicação:
1988
Tipo de documento:
Article