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The hippocampus and the prefrontal cortex are interconnected brain regions, playing central roles in higher brain functions, including learning and memory, planning complex cognitive behavior, and moderating social behavior. The axons in these ...
Overall, both GnRH I and II are widely expressed within the human brain. As expected based on traditional understanding of the role of GnRH in the HPG axis, GnRH I is highly expressed in the hypothalamus, especially the arcuate nucleus.
If, for instance, at a very early stage the neural tube fails to close properly, the cells that should form the forebrain and its overlying skull and scalp may not be generated; this condition, anencephaly (''without brain"), almost always results in stillbirth or in survival for only a few hours.
The results are clear: within several hours, the main axon of the sensory neuron shows an increase in the number of synapses. Exposing the neurons to the second messenger cyclic AMP produces a similar result.
Exquisitely detailed hand-drawings by Ramón y Cajal (1899) 4 show the main cells of the brain (neurons) and their extensive interconnections (via synapses) in the surface layer (grey matter) that makes the true structure of the brain. The importance of brain connections—synaptogenesis.
20 Νοε 2018 · Here, we describe circadian disruptions observed in various brain disorders throughout the human lifespan and highlight emerging evidence suggesting these disruptions affect the brain.
The scientists conducting this multiyear study want to know how prolonged changes to circadian rhythms—the internal processes that follow a roughly 24-hour cycle—may affect metabolism and body weight in people who keep unconventional sleep-wake schedules, such as nurses, security guards, and pilots.
