What is true regarding the gamma efferent neuron?

(D) All of the above # SPINDLES have motor nerve supply of their own and these nerves constitute about 30% of fibers in ventral roots, and belong in Erlanger and Gasser's A g group.> Because of their characteristic 3-6 mm diameter in size or called g efferents of Leksell or small motor nerve system.> Larger b motor neurons innervate both intrafusal and extrafusal fibers.