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Authors: Torrero, Carmen; Regalado, Mirelta; Perez, Esther; Rubio, Lorena; Salas, Manuel

Source: Nutritional Neuroscience, Volume 8, Number 1, February, 2005 , pp. 63-66(4)

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Abstract:

Golgi-Cox-impregnated pyramidal neurons of layer five motor cortical area were investigated in control, binaural ear-occluded control, undernourished and binaural ear-occluded undernourished Wistar rats of 12, 20 and 30 days of age. In neonatally undernourished, binaural ear-occluded-undernourished and partly in ear-occluded-control subjects, there were significant reductions in both the number and extent of the distal part of the dendritic branches of motor pyramids compared to their controls. Moreover, minimal effects on perikarya measurements were observed. These findings suggest that neonatal undernutrition and the concurrent reduction of auditory cues affect dendritic arbor development and possibly the convergence of the auditory experience upon motor pyramids and may interfere with the neocortical modulation of postural and movements activities.

Keywords: Golgi-Cox method; dendritic development; Neonatal undernutrition; ear occlusion

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/10284150400027131

Affiliations: Department of Developmental Neurobiology and Neurophysiology, Instituto de Neurobiolog�a, Universidad Nacional Aut�noma de M�xico, Campus UNAM Juriquilla, Quer�taro, Qro, 76001, Mexico

Publication date: 2005-02-01

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