2nd October 2019

wikipedia
17

What is a Commissural fiber?

In contrast to commissural fibers, association fibers connect regions within the same hemisphere of the brain, and projection fibers connect each region to other parts of the brain or to the spinal cord.

Subsequently, one may also ask, what is the projection neuron?

Projection neurons are classified broadly according to whether they extend axons within one cortical hemisphere (associative projection neurons), across the midline to the contralateral hemisphere (commissural projection neurons), or away from cortex (corticofugal projection neurons).

What is the projection tract?

Tracts. There are three different kinds of tracts (bundles of axons) that connect one part of the brain to another within the white matter: Projection tracts extend vertically between higher and lower brain areas and spinal cord centers, and carry information between the cerebrum and the rest of the body.

Are association fibers white matter?

Association fibers are axons that connect cortical areas within the same cerebral hemisphere. In human neuroanatomy, axons within the brain, called fibers, can be categorized on the basis of their course and connection into association fibers, projection fibers, and commissural fibers.
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