Abstract
Previous serial EM studies of the anterior nerve cord of amphioxus larvae implicate the third pair of large paired neurons (LPN3s) as key components of the pacemaker responsible for oscillatory premotor output in somites 1 and 2. Here the synaptic relationship between the LPN3s and a fourth such pair (LPN4s), located in somite 3, is examined from a second series of sections. Because of limited overlap between the two series, fiber identity can only be inferred in most instances. To act as pacemakers, the LPN3s must inhibit each other; the current data show similar patterns of synaptic contact, presumably also inhibitory, with the LPN4s. The oscillatory signal appears therefore to be relayed from one LPN pair to the next. Despite their evident importance in the anterior cord, the role these cells play more caudally in signal propagation is not clear.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
