part of innervates prothoracic nerve adult prothoracic segment adult prothoracic accessory nerve FBbt:00004056 VFB:FBbt_00004056 accessory prothoracic nerve ProAN first accessory nerve PAN AcNv1 fly_anatomy.ontology An adult nerve that connects to the prothoracic neuromere slightly posterior and ventral to the anterior prothoracic chordotonal organ and slightly dorsal to the root of the ventral prothoracic nerves (Power, 1948; Court et al., 2020). It extends laterally and dorsally almost to the lateral body wall before branching to innervate obliquely placed vertical muscles (Power, 1948; Court et al., 2020). adult peripheral nervous system adult prothoracic neuromere