projection fiber


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Related to projection fiber: association fiber, commissural fiber

projection fiber

n.
Any of the nerve fibers connecting the cerebral cortex with other centers in the brain or spinal cord.
References in periodicals archive ?
Cerebrum includes in its composition, the cerebral cortex (with a thickness between 2mm and 4mm), which is composed of gray matter (composed of local networks of neurons with dendrites and short unmyelinated axons), being located on the surface and covering the white matter (composed of very long myelinated axons which realize global and rapid nervous communication; it contains association fibers, which conduct nerve impulses between neurons corresponding to the same cerebral hemispheres-commissural fibers that connect neurons and gyri, between hemispheres and projection fibers which forms ascending and descending tracts necessary for the transmission of nerve impulses from the cerebrum into the other parts of the brain and/or spinal cord and vice versa).