Cover: Presence of sodium voltage-gated channel isoform 1.6 (NaV1.6) at the heminode and sensory terminals of a Ia afferent branch supplying innervation to a cat muscle spindle stained with antibodies targeting neurofilament H (green) and NaV1.6 (red). In the lower left corner are action potentials and instantaneous firing rates evoked by ramp-hold-release stretches recorded from a cat Ia afferent. From Carrasco DI, Vincent JA, Cope TC. Distribution of TTX-sensitive voltage-gated sodium channels in primary sensory endings of mammalian muscle spindles. J Neurophysiol 117: 1690–1701, 2017; doi:10.1152/jn.00889.2016.