Fig. 12
From: The complex simplicity of the brittle star nervous system
Organization of the hyponeural peripheral nerves in A. kochii. Transmission electron microscopy. a Proximal muscle nerve. b, c Median hyponeural nerve. b Bundles of neuronal processes (asterisk) branching off the median hyponeural nerve and entering the oral intervertebral muscle. The inset in b shows a neuromuscular synapse (arrow). c Processes of neurosecretory-like cells passing through an opening in the basal lamina. Abbreviations: bl – basal lamina; gc – glial cell; il – intervertebral ligament; m – myocyte; np – neuronal processes