Document Detail


Flight and walking in locusts-cholinergic co-activation, temporal coupling and its modulation by biogenic amines.
MedLine Citation:
PMID:  23671643     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Walking and flying in locusts are exemplary rhythmical behaviors generated by central pattern generators (CPG) that are tuned in intact animals by phasic sensory inputs. Although these two behaviors are mutually exclusive and controlled by independent CPGs, leg movements during flight can be coupled to the flight rhythm. To investigate potential central coupling between the underlying CPGs, we used the muscarinic agonist pilocarpine and the amines octopamine and tyramine to initiate fictive flight and walking in deafferented locust preparations. Our data illustrate that fictive walking is readily evoked by comparatively lower concentrations of pilocarpine, whereas higher concentrations are required to elicit fictive flight. Interestingly, fictive flight did not suppress fictive walking so that the two patterns were produced simultaneously. Frequently, leg motor units were temporally coupled to the flight rhythm, so that each spike in a step cycle volley occurred synchronously with wing motor units firing at flight rhythm frequency. Similarly, tyramine also induced fictive walking and flight, but mostly without any coupling between the two rhythms. Octopamine in contrast readily evoked fictive flight but generally failed to elicit fictive walking. Despite this, numerous leg motor units were recruited, whereby each was temporarily coupled to the flight rhythm. Our results support the notion that the CPGs for walking and flight are largely independent, but that coupling can be entrained by aminergic modulation. We speculate that octopamine biases the whole motor machinery of a locust to flight whereas tyramine primarily promotes walking.
Authors:
Jan Rillich; Paul A Stevenson; Hans-Joachim Pflueger
Related Documents :
22255413 - Using dwt for ecg motion artifact reduction with noise-correlating signals.
3998813 - The sharpening of frequency tuning curves requires patterned activity during developmen...
7437583 - Trials with the auditory response cradle iii: head turns and startles as auditory respo...
Publication Detail:
Type:  Journal Article     Date:  2013-05-09
Journal Detail:
Title:  PloS one     Volume:  8     ISSN:  1932-6203     ISO Abbreviation:  PLoS ONE     Publication Date:  2013  
Date Detail:
Created Date:  2013-05-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101285081     Medline TA:  PLoS One     Country:  United States    
Other Details:
Languages:  eng     Pagination:  e62899     Citation Subset:  IM    
Affiliation:
Institute for Neurobiology, Free University Berlin, Berlin, Germany.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Synergies between Intrinsic and Synaptic Plasticity Based on Information Theoretic Learning.
Next Document:  Low Dose Decitabine Treatment Induces CD80 Expression in Cancer Cells and Stimulates Tumor Specific ...