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THE CORPUS CALLOSUM AND STEREOPSIS. The corpus callosum, a huge band of myelinated fibers, connects the two cerebral hemispheres. Stereopsis is one mechanism for seeing depth and judging distance. Although these two features of the brain and vision are not closely related, a small minority of corpus-callosum fibers do play a small role in Stereopsis.
Muscle Fiber Types. Skeletal muscle fibers have metabolic and mechanical differences that allow them to be classified into different types. A motor unit, which consists of a somatic efferent neuron and all the muscle fibers it innervates, is comprised of muscle fibers that are all of the same type.hus the classification for muscle fibers also applies for motor units. Some of the different characteristics of muscle fiber (and motor unit) types are listed in the table. These are grouped in colors according to four basic features about muscle fibers.