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ISSN 2520-9078 (Electronic)

2014, Number 1

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Revista de Ciencias Médicas de la Habana 2014; 20 (1)

Association between brain asymmetries by visual stimulation with lateralizations in humans

Rodríguez LIR, Rodríguez LO

Language: Spanish
References: 20
Page: 54-67
PDF size: 366.54 Kb.


ABSTRACT

Introduction: motor functional lateralizations, processing a sensory stimulus and functional brain asymmetries are not fully understood and it is unknown whether there are associations between functional brain asymmetries by visual stimulation with lateralizations in humans.
Objective: to determine the relationship between motor lateralizations and brain asymmetry by sensory stimulation through the combination of subjective and objective measurement instruments.
Methods: the work was carried out with 35 healthy young adults, who underwent a series of tests of motor and sensory laterality, an electrophysiological study (visually evoked potential), simultaneously with an electroencephalogram. Visual homologous brain areas to each hemisphere and asymmetry between them were determined. Global asymmetry index was calculated between the dorsal, ventral, temporal and frontal brain regions and it was sought associations between these regions, functional and sensory lateralities.
Results: there was a predominance of right motor lateralizations regarding the sensory tests. It was observed areas of the dorsal and ventral regions in both hemispheres from the visually evoked potential in the group. The temporal visual region was highlighted to the right and the frontal to the left. It was found associations between the frontal, ventral and dorsal regions with some of the functional lateralities studied.
Conclusions: it is concluded that in certain brain areas existed predominant laterality according to the volumetric study of both hemispheres, which is not the case in specific brain regions.


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