<prompt> What is true regarding the gamma efferent neuron?An A group motor neuron with a smaller diameter than that of alpha efferent neuronsInnervates intrafusal fibresInnervates muscle fibres that stretch annulospiral bulbar endingsAll of the above  <response>: 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 Gassers 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. 