alpha fibre

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A large-diameter, thickly myelinated type of efferent somatic nerve fibre, such as the fibre supplying a skeletal muscle, composed of alpha motor neurons and having high conduction velocity. US alpha fiber. Also written α fibre. Compare C fibre, gamma fibre, Ia fibre, Ib fibre, II fibre. [From alpha (α) the first letter of the Greek alphabet]

Subjects: Psychology.

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