gamma efferent

gam·ma ef·fer·ent

the thin axon of a gamma motor neuron innervating the intrafusal muscle fibers of a muscle spindle.
References in periodicals archive ?
Each muscle spindle is built around 3-10 small intrafusal muscle fibres attached to the sheaths of the surrounding extrafusal skeletal muscle fibres, the ends of which are excited by small gamma efferent motor nerve fibres.
The brain interprets this data as lengthened muscle fibres and thus fires off fewer gamma efferent impulses (turning down gamma gain).
Again the brain interprets this data as lengthened muscle fibres and fires off fewer gamma efferents.