Cerebral Cortex

The cerebral cortex is a sheet of neural tissue that is outermost to the cerebrum of the mammalian brain. It plays a key role in memory, attention, perceptual awareness, thought, language, and consciousness. It is constituted of up to six horizontal layers, each of which has a different composition in terms of neurons and connectivity. The human cerebral cortex is 2–4 mm (0.08–0.16 inches) thick. In preserved brains, it has a gray color, hence the name "grey matter". In contrast to gray matter that is formed from neurons and their unmyelinated fibers, the white matter below them is formed predominantly by myelinated axons interconnecting neurons in different regions of the cerebral cortex with each other and neurons in other parts of the central nervous system. The surface of the cerebral cortex is folded in large mammals, such that more than two-thirds of it in the human brain is buried in the grooves, called "sulci". The phylogenetically most recent part of the cerebral cortex, the neocortex (also called isocortex), is differentiated into six horizontal layers; the more ancient part of the cerebral cortex, the hippocampus (also called archicortex), has at most three cellular

Publisher
Oxford University Press
Country
United States
History
1991-
Impact factor
6.844
Some content from Wikipedia, licensed under CC BY-SA

Why does the brain remember dreams?

Some people recall a dream every morning, whereas others rarely recall one. A team led by Perrine Ruby, an Inserm Research Fellow at the Lyon Neuroscience Research Center, has studied the brain activity of ...

Feb 17, 2014
popularity 4 / 5 (6) | comments 0

Switching brain development on and off

(Medical Xpress)—The possibility of nerve cell regeneration is a step closer after neuroscientists identified the genetic signals that play a crucial role in normal development - driving stem cells to produce ...

Jan 30, 2014
popularity 4.4 / 5 (8) | comments 0 | with audio podcast

Cortical cause of anxiety states

Fear, at the right level, can increase alertness and protect against dangers. Disproportionate fear, on the other hand, can disrupt the sensory perception, be disabling, reduce happiness and therefore become ...

Dec 02, 2013
popularity 4.8 / 5 (5) | comments 1