منابع مشابه
Yawn duration predicts brain weight and cortical neuron number in mammals.
Research indicates that the motor action pattern of yawning functions to promote cortical arousal and state change through enhanced intracranial circulation and brain cooling. Because the magnitude of this response likely corresponds to the degree of neurophysiological change, we hypothesized that interspecies variation in yawn duration would correlate with underlying neurological differences. ...
متن کاملVariation in hippocampal neuron number with age and brain volume.
Hippocampal size and neuron number are reduced in a number of conditions, including temporal lobe epilepsy and Alzheimer's disease. Furthermore, a decrease with advancing age has also been suggested. The present study examined the entire hippocampal formation of 12 subjects aged from 46 to 85 years and free from neurological disease. The volume of seven subregions (CA1, CA2-3, CA4, dentate gyru...
متن کاملYawn - Scholarpedia
Stretching and yawning (known as pandiculation when they occur together) are under-researched features of behavior. Ethologists agree that almost all vertebrates yawn (Deputte, 1974). Yawning is morphologically similar in reptiles, birds, mammals and fish. These behaviors may be ancestral vestiges maintained throughout evolution with little variation (phylogenetic old origins). Systematic and c...
متن کاملNeuron-specific expression of neuroglobin in mammals.
Neuroglobin, a vertebrate oxygen-binding protein, is expressed in many regions of the adult brain. We examined the cell type-specific expression of neuroglobin in neurons and astroglial cells in primary cultures of fetal hippocampal cells and sections of the adult mouse brain using neuroglobin-specific polyclonal antibodies and cell type-specific markers NeuN and GFAP to differentiate between n...
متن کاملCortical computation in mammals and birds.
We humans are particularly proud of our cortices. Our brains are bigger than they should be, given our body size; furthermore, our neocortices constitute a larger fraction of the brain than in all other mammals, and our cortices probably contain more neurons than those of any other species on the planet (1). This cortical expansion is thought to give us our cognitive edge over the rest of the a...
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ژورنال
عنوان ژورنال: Biology Letters
سال: 2016
ISSN: 1744-9561,1744-957X
DOI: 10.1098/rsbl.2016.0545