The University of Southampton
University of Southampton Institutional Repository

Lateral giant fibre activation of exopodite motor neurones in the crayfish tailfan

Lateral giant fibre activation of exopodite motor neurones in the crayfish tailfan
Lateral giant fibre activation of exopodite motor neurones in the crayfish tailfan
The uropods of decapod crustaceans play a major role in the production of thrust during escape swimming. Here we analyse the output connections of a pair of giant interneurones, that mediate and co-ordinate swimming tail flips, on motor neurones that control the exopodite muscles of the uropods. The lateral giants make short latency output connections with phasic uropod motor neurones, including the productor, the lateral abductor and adductor exopodite motor neurones that we have identified both physiologically and anatomically. On the other hand, tonic motor neurones, including the ventral abductor and reductor exopodite motor neurones, receive no input from the lateral giants. We show that there is no simple reciprocal activation of the phasic opener (lateral abductor) and closer (adductor) motor neurones of the exopodite, but instead both phasic motor neurones are activated in parallel with the productor motor neurone during a tail flip. Our results show that the neuronal pathways activating the tonic and phasic motor neurones of the exopodite are apparently independent, with phasic motor neurones being activated during escape movements and tonic motor neurones being activated during slow postural movements.
escape behaviour, giant fibre, local circuits, motor neurone, tail flip
0340-7594
621-630
Nagayama, T.
eaa8380e-589f-465e-ab43-a98881924846
Araki, M.
fe931e60-78e0-4d55-a97a-33829b122bf4
Newland, P.L.
7a018c0e-37ba-40f5-bbf6-49ab0f299dbb
Nagayama, T.
eaa8380e-589f-465e-ab43-a98881924846
Araki, M.
fe931e60-78e0-4d55-a97a-33829b122bf4
Newland, P.L.
7a018c0e-37ba-40f5-bbf6-49ab0f299dbb

Nagayama, T., Araki, M. and Newland, P.L. (2002) Lateral giant fibre activation of exopodite motor neurones in the crayfish tailfan. Journal of Comparative Physiology A: Neuroethology, Sensory, Neural, and Behavioral Physiology, 188 (8), 621-630. (doi:10.1007/s00359-002-0337-3).

Record type: Article

Abstract

The uropods of decapod crustaceans play a major role in the production of thrust during escape swimming. Here we analyse the output connections of a pair of giant interneurones, that mediate and co-ordinate swimming tail flips, on motor neurones that control the exopodite muscles of the uropods. The lateral giants make short latency output connections with phasic uropod motor neurones, including the productor, the lateral abductor and adductor exopodite motor neurones that we have identified both physiologically and anatomically. On the other hand, tonic motor neurones, including the ventral abductor and reductor exopodite motor neurones, receive no input from the lateral giants. We show that there is no simple reciprocal activation of the phasic opener (lateral abductor) and closer (adductor) motor neurones of the exopodite, but instead both phasic motor neurones are activated in parallel with the productor motor neurone during a tail flip. Our results show that the neuronal pathways activating the tonic and phasic motor neurones of the exopodite are apparently independent, with phasic motor neurones being activated during escape movements and tonic motor neurones being activated during slow postural movements.

This record has no associated files available for download.

More information

Published date: September 2002
Keywords: escape behaviour, giant fibre, local circuits, motor neurone, tail flip
Organisations: Biological Sciences

Identifiers

Local EPrints ID: 56579
URI: http://eprints.soton.ac.uk/id/eprint/56579
ISSN: 0340-7594
PURE UUID: 4990221b-44aa-47b5-813e-b638816014e2
ORCID for P.L. Newland: ORCID iD orcid.org/0000-0003-4124-8507

Catalogue record

Date deposited: 08 Aug 2008
Last modified: 16 Mar 2024 02:59

Export record

Altmetrics

Contributors

Author: T. Nagayama
Author: M. Araki
Author: P.L. Newland ORCID iD

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×