gamma fibre

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A medium-diameter partly myelinated type of efferent somatic nerve fibre, composed of gamma motor neurons and having intermediate conduction velocity. A typical example is a fibre supplying a muscle spindle. US gamma fiber. Also written γ fibre. Compare alpha fibre, Ia fibre, Ib fibre, II fibre, C fibre. [From gamma (γ) the third letter of the Greek alphabet]

Subjects: Psychology.

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