The BBC television programme Right Hand, Left Hand, broadcast in August 1953, used a postal questionnaire to ask viewers about their handedness. Respondents were born between 1864 and 1948, and in principle therefore the study provides information on rates of left-handedness in those born in the nineteenth century, a group for which few data are otherwise available. A total of 6,549 responses w...

A 69-year old male with a large pulmonary embolism is described before and after thrombolytic treatment. The echocardiographic and electrocardiographic hallmarks of right ventricular pressure overload and dilatation are illustrated.

Individual intra-digit somatotopy of all phalanges of the middle and little finger of the right and left hand was studied by functional magnetic resonance imaging in 12 healthy subjects. Phalanges were tactilely stimulated and activation in BA 3b of the human primary somatosensory cortex could be observed for each individual phalanx. Activation peaks were further analysed using the Direction/Or...

BACKGROUND Acute onset of a sensory alien hand phenomenon has been observed only from a supratentorial lesion involving the non-dominant hand, mostly from a right posterior cerebral artery infarction. A single acute vascular lesion resulting in a dominant hand sensory alien hand syndrome has not been previously documented. CASE REPORT A 78-year old right-handed woman exhibited right sensory a...

The prominence of the hand function is underlined fundamentally by its rich vascular system. The superficial palmar arch incredibly provides hand with the blood supply, which is normally formed by the ulnar artery and superficial palmar branch of the radial artery. In the current case, the unilateral absence of superficial palmar arch with the rare presence of the median artery was reported, wh...

A patient with MRI confirmed lesions in the corpus callosum and the left cingulate gyrus had a rare syndrome of crossed avoiding reaction of the left hand. With the right hand she could reach a stimulus object in whatever space it was presented. With the left hand, however, she could not mobilise it to reach a stimulus presented in the right hemispace relative to her body axis. In the left hemi...

Comparing forelimb use across primates can improve the understanding of the mechanisms and functions of brain asymmetry. We broadened the comparative framework by investigating hand use biases across spontaneous behaviors in 11 captive emperor tamarins of 2 family groups. We found a right preference across 58% of pooled unimanual bouts and 60% of all tasks. The maximum biases for a single task ...

Visual targets can be processed more quickly and reliably when a hand is placed near the target. Both unimodal and bimodal representations of hands are largely lateralized to the contralateral hemisphere, and since each hemisphere demonstrates specialized cognitive processing, it is possible that targets appearing near the left hand may be processed differently than targets appearing near the r...

Infant hand-use preferences are related to mother's, but not father's, handedness. Since infants match mother's hand-use during toy play, maternal handedness can affect infant hand-use. Twenty-eight mother-infant pairs (14 left-handed and 14 right-handed infants but all right-handed mothers) were videotaped while playing with six toys on the infant's 7-, 9-, and 11-month birthdays. Play was ana...

Research suggests that gestures influence cognitive processes, but the exact mechanism is not clear. Additionally, it has been shown that when a linguistic task (metaphor explanation) involves the right brain hemisphere, the left hand becomes more gesturally active. We hypothesized that gestures with a particular hand activate cognitive processes in the contralateral hemisphere. We examined whe...