Laterality in living beings, hand dominance, and cerebral lateralization

Pilot Study: The Role of the Hemispheric Lateralization in Mental Disorders by Use of the Limb (Eye, Hand, Foot) Dominance

Introduction: Based on the previous studies, we know that the hemispheric lateralization defects, increase the probability of psychological disorders. We also know that dominant limb is controlled by dominant hemisphere and limb preference is used as an indicator for hemisphere dominance. In this study we attempted to explore the hemispheric dominance by the use of three limbs (hand, foot...

Cerebral lateralization determines hand preferences in Australian parrots.

Individual preference for the use of one limb over the other to explore the environment or manipulate objects is common trait among vertebrates. Here, we explore the hypothesis that limb preference is determined by the engagement of a particular cerebral hemisphere to analyse certain stimuli. We recorded the eye and foot preferences of 322 individuals from 16 species of Australian parrots while...

Characteristics of Living Beings

Cerebral Laterality in Schizophrenia

Electro-enccphalographic (E.E.G.) pattern of 35 drug free schizophrenic patients was studied. 15 cases (42.86%) had abnormal EEG records, 9 records out of 15 abnormal records showed effect of laterality. Laterality of abnormality to left hemisphers was present in 7 cases while laterality to right hemisphere was present only in 2 cases. Cortical locations of abnormalities were also studied. The ...

A Study of Cerebral Dominance by Laterality Score and Order of Reporting in Dichotic Listening Test

The Dichotic listening test was performed on 8 schizophrenics and 8 normal healthy controls. A positive correlation between laterality score and shift of order of reporting from one hemisphere to other was found in light handed scliizophrenics during active stage of the disease. Order of reporting alone may be a factor responsible for this shift of laterality in these patients. Further, on foll...