Although there is knowledge about earlier mean age at menopause among left-handed postmenopausal women, it is unclear from the literature whether age of menarche is influenced by the prenatal hormonal pattern and cerebral lateralization. We therefore planned to investigate the relation between age of menarche and cerebral lateralization in girls at an altitude of nearly 2000 m. Sixty-two girls,...

Due to the separation of the eyes, temporal retinal disparities are created during binocular stimulation and they have been proposed to be the basis of several stereo-visual effects. This paper studies the sensitivity of cortical neurons from area V1 to interocular temporal delay in the awake monkey (Macaca mulatta). Forty-four cells were included in this study. Temporal delay sensitivity was o...

Whether general principles can explain the layouts of cortical maps remains unresolved. In primary visual cortex of ferret, the relationships between the maps of visual space and response features are predicted by a "dimension-reduction" model. The representation of visual space is anisotropic, with the elevation and azimuth axes having different magnification. This anisotropy is reflected in t...

Ocular dominance plasticity has long served as a successful model for examining how cortical circuits are shaped by experience. In this paradigm, altered retinal activity caused by unilateral eye-lid closure leads to dramatic shifts in the binocular response properties of neurons in the visual cortex. Much of the recent progress in identifying the cellular and molecular mechanisms underlying oc...

Healthy children and undergraduates were observed for hand preference and measured for hand skill in representative samples collected over some years. Writing and throwing were observed for 2844 participants drawn from primary, secondary and higher levels of education. The 12 actions of a standard questionnaire were observed for 2388 secondary school children and undergraduates. These findings ...

The question addressed here was whether lateral asymmetry of processing might be influenced by response position, a factor which is usually considered irrelevant in divided visual field studies of cerebral lateralization. For this purpose a lexical decision task, which had previously been investigated with lateral unimanual two-finger choice reactions (Heister et al. 1983) was carried out under...

Consistent handedness and language laterality are two of the most striking behavioral and cognitive asymmetries observed in humans. Alterations in the typical pattern of cerebral laterality, termed "anomalous dominance," is observed in left-handers and some patients with verbal learning disabilities. We undertook the study of a genetically distinct group of subjects, XXY males (Klinefelter's sy...

Unilateral electroconvulsive therapy was given to 32 right-handed patients for relief of depression. Sixteen patients received electrode placement on the right side for the first treatment and on the left side for the second treatment. For the other 16 patients the order of sides was reversed. The word Associate Learning subtest of the Wechsler Memory Scale was administered about 20 minutes aft...

The problem of the functional specialization of the two cerebral hemispheres has its origin in studies of aphasia. In a report which received little attention at the time, Marc Dax maintained (1836) that aphasia was associated with lesions of the left hemisphere. Broca admitted in his earlier writings that both hemispheres might be involved in language functions but in his later observations he...

26 27 Asymmetry of the human cerebellum was investigated using intrinsic functional 28 connectivity. Regions of functional asymmetry within the cerebellum were identified 29 during resting-state functional MRI (fMRI; N=500) and replicated in an independent 30 cohort (N=500). The most strongly right lateralized cerebellar regions fell within the 31 posterior lobe including Crus I and Crus II in ...