We investigated the effects of a concurrent physical therapy activity (keeping the hand open) during delays to reinforcement in an adult man with acquired brain injuries. Once a relatively stable level of hand-open behavior was obtained, the participant was asked to choose between a small immediate reinforcer and a larger delayed reinforcer contingent on keeping the hand open at greater-than-ba...

To evaluate whether hemispheric lesion distribution in multiple sclerosis is related to the uneven interhemispheric localisation of cerebral function, a 10 item self administered questionnaire evaluating hand preference and supratentorial brain MRI was obtained in 23 patients with clinically definite multiple sclerosis. The mean degree of hand preference was +74 (range -86 to +100). The median ...

The present study examined the relationship between hand preference degree and direction, functional language lateralization in Broca's and Wernicke's areas, and structural measures of the arcuate fasciculus. Results revealed an effect of degree of hand preference on arcuate fasciculus structure, such that consistently-handed individuals, regardless of the direction of hand preference, demonstr...

A group performance test of handedness was administered to 1556 undergraduates. This test required subjects to place dots in circles as rapidly as possible. The test was found to be reliable, and to correlate with hand preference. Both hand performance and hand preference measures are skewed in the population as a whole, but the distributions can be adequately fitted by two normal curves, one w...

As non-human primates are phylogenetically close to humans, they are ideal models to investigate the precursors of human brain hemispheric specialisation. However, in spite of hundreds of reports investigating hand preference, empirically based theories generating valuable predictions are still lacking, mainly because of a disappointing deficiency in comparability between studies and even more ...

In this study, the relationships between hand preference degree and right left ear hearing times were investigated in high school students divided into groups according to their preferences. order determine Edinburg handedness inventory was used. A tuning fork with 128 Hz frequency a digital chronometer used assess time. There positive lineer both right-handed subjects. These relations negative...