Isocortex

The isocortex, is a part of the mammalian brain. Between all the mammals studied to date, including humans, dolphins have been found to have the most neocortical neurons. In the human brain, it is the largest part of the cerebral cortex which covers the two cerebral hemispheres, with the allocortex making up the rest. The isocortex is made up of six layers, labelled from the outermost inwards, I to VI. In humans, the isocortex is involved in higher functions such as sensory perception, generation of motor commands, spatial reasoning, conscious thought and language. There are two types of cortex in the isocortex – the true isocortex and the proisocortex.