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SET and the Indo-European Migrations
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[QUOTE]Originally posted by Evergreen: [QB] The Relationship between Corpus Callosum Size and Forebrain Volume Jäncke et. al Cerebral Cortex Jan/Feb 1997;7:48–56 "In this case our study would indicate that the degree of interhemispheric connectedness decreases with increasing human brain size. This would concur with theoretical predictions made by Ringo and co-workers (Ringo, 1991; Ringo et al., 1994). They argued that as brain size is scaled up there must be a fall in interhemispheric connectivity, due to the increasing time constraints of transcallosal conduction delay. Consequently, functionally related neuronal elements would cluster in one hemisphere, so that increasing brain size would be the driving force in the phylogeny of hemispheric specialization. With regard to callosal connectivity, our morphometric data may provide first empirical support of this conjecture. It should be investigated whether findings of apparent gender differences in the asymmetry of higher-order cerebral functions may also be confounded by brain size." Brain Volume in Autism Hardan et. al. Journal of Child Neurology / Volume 16, Number 6, June 2001 "Increased brain size has been observed in individuals with autism with a wide range of cognitive functioning. The purpose of this investigation was to obtain measurements of the brain volume in a sample of nonmentally retarded autistic individuals. Magnetic resonance imaging scans from 16 nonmentally retarded individuals with autism and 19 male volunteer comparison subjects were obtained and the following structures were measured: third, fourth, and lateral ventricles and intracranial and cerebral volumes. Mean cerebral and third ventricle volumes in the autistic subjects were significantly greater than in the controls when adjusted for intracranial volume. No other significant results were found. Our finding of increased brain volume in autism is consistent with previous reports in the literature. Additional longitudinal neuroimaging and, more importantly, neuropathologic studies are warranted to provide a better understanding of the complexities underlying increased brain size in autism." Is there a link between engineering and autism? Baron-Cohen et al. Autism, 1997, 1, 153-163 "There thus seems to be a small but statistically significant link between autism and engineering. We wish to stress however that the majority of engineers have no connection with autism, and the majority of parents of autism have no connection with engineering. Nevertheless, this link between the two phenomena merits further research. The results of this study fit predictions from Domain Specificity theory, as applied to autism. The current results might also help explain why a condition like autism persists in the gene pool: the very same genes that lead an individual to have a child with autism can lead to superior functioning in the domain of folk physics." Evergreen Writes: Of interest when you consider the left-hemisphere focus of autistic individuals. We can also observe the possible impact of Ice Age Europe and the lack of direct sunlight in the modern Black North-American community where Vitamin D related autism may be on the rise. This of course takes us back to the debate a few months ago on *how* intelligence is defined and measured. Is it measured soley by logic? Does the appropriate measure of intelligence (if one can be found) use a more synergistic/holistic model? [/QB][/QUOTE]
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