AbstractThe distributions of the hand preferences (Geschwind scores) were studied in men and women. The incidences right-, mixed-, left-handers 66.1, 30.5, 3.4%, respectively. left- right-handers (LHs, RHs) represented by two bars located at opposite ends a J-shaped histogram for total sample, men, RHs, male RHs not J-shaped, but negatively skewed, mode being close to mean. frequencies females increased linearly. LHs did significantly deviate from normality. Except LHs, percentage Geschwind...

Quadrupedal gait in humans, also known as Unertan syndrome, is a rare phenotype associated with dysarthric speech, mental retardation, and varying degrees of cerebrocerebellar hypoplasia. Four large consanguineous kindreds from Turkey manifest this phenotype. In two families (A D), shared homozygosity among affected relatives mapped the trait to 1.3-Mb region chromosome 9p24. This genomic includes VLDLR gene, which encodes very low-density lipoprotein receptor, component reelin signaling...

The biological basis for the development of cerebro-cerebellar structures required posture and gait in humans is poorly understood. We investigated a large consanguineous family from Turkey exhibiting an extremely rare phenotype associated with quadrupedal locomotion, mental retardation, hypoplasia, linked to 7.1-Mb region homozygosity on chromosome 17p13.1–13.3. Diffusion weighted imaging fiber tractography patients' brains revealed morphological abnormalities cerebellum corpus callosum,...

AbstractCell phones emitting pulsed high-frequency electromagnetic fields (EMF) may affect the human brain, but there are inconsistent results concerning their effects on electroencephalogram (EEG). We used a 16-channel telemetric electroencephalograph (ExpertTM), to record EEG changes during exposure of skull EMF emitted by mobile phone. Spatial distribution was especially concentrated around ipsilateral eye adjacent basal surface brain. Traditional full noises operation cellular Using...

AbstractThe relation of hand skill to the excitability motoneurons innervating postural soleus muscle was studied in normal human subjects. The motoneuronal tested by recovery curve Hoffmann reflex. assessed peg moving test. Females have been found be better than males skill. It established that H response from right leg significantly lower left handed opposite handers. In ambidexters, there no significant difference between heights and curves. laterality quotients curves were normally...

The distribution of paw preferences were studied in 28 dogs. preference was assessed by counting the right and left movements performed to remove an adhesive plaster from eyes. significance minus reaches percentages evaluated statistically each animal. There three distinct groups respect dogs: right-preferent (57.1%), left-preferent (17.9%), ambidextrous (25.0%). Statistical analysis showed that observed frequencies for group not merely chance variations which would be expected a random...

We re-studied the distribution of paw preference in rats using a new computerized food-reaching test, which recorded times and time intervals between single right- left-paw entries. Using traditional we found that 144 rats, 72.7% were right-handed, 19.7% left-handed, 7.6% mixed-handed. This population-level J-shaped right-hand did not fit binomial chance (25:25:50). Of right handers, 99.5% first used their 0.5% left paw; left-handers, 98.6% 1.4% paw. mixed-handers, 59% 41% for food reaching....

The principal objective of this work was to study the influence familial sinistrality (FS) on distribution hand preference in males and females. assessed by Oldfield's questionaire. distributions Geschwind scores were compared subjects without with FS. strong right-handedness reduced; left-handedness accentuated under This left shift presumably inherited a factor more pronounced than It tentatively suggested that FS might be better mathematics no

Paw preference assessed by a food-reaching test was studied in male and female cats. Of the total sample (N = 66), 34 (51.5%) were right-preferent, 24 (36.4%) left-preferent, 8 (12.1%) ambilateral. In sample, there evidence for an overall paw preference, general right-, left-paw preference. The distribution of right- minus reaches neither normal, nor U or J shaped. males 24), 10 (41.7%) right-pawed, 12 (50.5%) left-pawed, 2 (8.3%) males, overall, general, relative to no fitted guassian data...

The author has discovered a new syndrome with quadrupedal gait, flexed head and body, primitive speech, severe mental retardation, mild cerebellar signs disturbed conscious experience. This was exhibited by 5 of 19 children from consanguineous family. pedigree demonstrated typical autosomal-recessive inheritance. genetic nature this suggests backward stage in human evolution, which is most probably caused mutation, rendering, turn, the transition quadrupedality to bipedality. would then be...

The relationship between serum testosterone level and nonverbal intelligence was studied in right-handed young adults with regard to handedness. Hand preference assessed by the Edinburgh Handedness Inventory. skill measured a peg moving task. Serum determined using tritium-marked-radioimmunoassay. Visual-spatial performance (nonverbal intelligence) Cattell's Culture Fair Intelligence Test. In men consistent right-hand (GSs: 80 100), IQ found be positively linearly related testosterone, which...

AbstractRelations of sex hormones to the degree right-hand preference was studied in right-handed male and female adult subjects. Hand assessed by Edinburgh Waterloo Handedness Questionnaires. Males consisted weakly, moderately, strongly Females comprised only moderately In females, serum estradiol found be negatively linearly significantly correlated with preference. males, testosterone, as well estradiol. showed a significant negative linear correlation Sex hormone binding globulin also...

The relationship between serum testosterone level and nonverbal intelligence was studied in right-handed young adults. Hand preference assessed by the Edinburgh Handedness Inventory. Serum determined using tritium-marked-radioimmunoassay. Only men, (Cattell's Culture Fair Intelligence Test) found to be significantly directly related levels. It concluded that adults is associated with exhibiting fundamental differences men women.

The relation of hand skill to nonverbal intelligence (spatial reasoning) tested by Cattle's Culture Fair Intelligence Test was studied in left-handed subjects. Hand assessed the peg moving test, which revealed that some left-handers (Geschwind scores and self-reports) were ambidexters. distribution for right fitted Gaussian data better than left skill. R-L difference between hands times could also be described normal distributions total sample, ambidexters, left-handers. ambidexters as fast...

The allometric relationship between brain and body size asymmetry in the weight of cerebral hemispheres were studied dogs. A regression analysis versus revealed an according to power function Y = kXa. right hemisphere was found be significantly heavier than left. This finding not associated with paw preference. In accordance previous studies, it concluded that right-biased may a common feature mammalian brain. Functional implications results discussed regard specializations.

There are some reports that classical neuroleptics may lead to osteoporosis or reduced bone mineral density (BMD). However, there is no adequate information about the effects of atypical on BMD. The aim this study was measure BMD in schizophrenic patients taking class -ical and neuroleptics, compared healthy controls. Seventy- five with schizophrenia (40 [CN], 35 [AN]) 20 controls (HC) were included study. Spine (L1 L4) measured by dual-energy X-ray absorptiometry. ANOVA showed higher HC...

In humans, as in nonhuman primates, the digits of hands are similar length during early fetal development. Subsequently, differentiation leads to a patter unequal finger lengths, described by George finger-length pattern. Recent work Manning and colleagues suggested that digit patterns due influences sex hormones. Most importantly for psychology, such might also relate cognitive activities influenced organizing actions The exciting possibility having an easily measurable indicator action...

The aim of this study was to investigate the effects acute or habitual exercise on visual evoked potentials (VEP). group consisted 9 female and 7 male volleyball players control contained students who were not involved in any sportive activity. N75, P100, N145 latency amplitudes measured before after exercise. Intragroup comparison made evaluate intergroup for chronic Significant differences noted between athletes sedentary subjects terms pre-exercise left-N145 latencies left -P100...

The relationship between serum testosterone level and hand performance was studied in right-handed young adults without familial sinistrality. Hand measured by a dot-filling task, which found to be associated with depending upon sex. In women, the right- left-hand negatively linearly related testosterone; there no significant correlation minus testosterone. men, were directly inversely testosterone, respectively. This pattern exhibited some variations on eye foot preferences. difference...

The relationship between nonverbal intelligence (spatial reasoning) and manual proficiency was studied in male female left-handers. Manual assessed by measuring the speed accuracy performing dot-filling test. Nonverbal Cattle's Culture Fair Intelligence Test. Females were found to be better than males left-hand performance, more lateralized proficiency. No significant sex difference could established right-hand performance. skill positively correlated test (p less 0.001). There a negative...

The relation of mental ability for spatial reasoning (Cattell's Culture Fair Intelligence Test) to hand skill assessed by peg-moving task was studied in normal left-handers. Nonlinear, quadratic relationships were established between these two parameters exhibiting different characteristics according sex and writing hand. It concluded that the contributions right left cerebral hemispheres cognitive-motor output brain depend on as well degree left-handedness