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Projection fiber
The projection fibers consist of efferent and afferent fibers uniting the cortex with the lower parts of the brain and with the spinal cord. In human neuroanatomy, bundles of axons within the brain, called fibers, can be categorized by their function into association fibers, projection fibers, and commissural fibers.
==Efferent==
The principal efferent strands are:
* (1) the motor tract, occupying the genu and anterior two-thirds of the occipital part of the internal capsule, and consisting of
*
* (a) the geniculate fibers, which decussate and end in the motor nuclei of the cranial nerves of the opposite side; and
*
* (b) the cerebrospinal fibers, which are prolonged through the pyramid of the medulla oblongata into the medulla spinalis:
* (2) the corticopontine fibers, ending in the nuclei pontis.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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