Document Detail

Intracellular responses of antennal chordotonal sensilla of the American cockroach.
MedLine Citation:
PMID:  15118224     Owner:  NLM     Status:  MEDLINE    
The responses of mechanoreceptor neurons in the antennal chordotonal organ have been examined in cockroaches by intracellular recording methods. The chordotonal organ was mechanically stimulated by sinusoidal movement of the flagellum. Stimulus frequencies were varied between 0.5 and 150 Hz. Receptor neurons responded with spike discharges to mechanical stimulation, and were classed into two groups from plots of their average spike frequencies against stimulus frequency. Neurons in one group responded to stimulation over a wide frequency range (from 0.5 to 150 Hz), whereas those in a second group were tuned to higher frequency stimuli. The peak stimulus frequency at which receptor neurons showed maximum responses differed from cell to cell. Some had a peak response at a stimulus frequency given in the present study (from 0.5 to 150 Hz), whereas others were assumed to have peak responses beyond the highest stimulus frequency examined. The timing for the initiation of spikes or of a burst of spikes plotted against each stimulus cycle revealed that spike generation was phase-locked in most cells. Some cells showed phase-independent discharges to stimulation at lower frequency, but increasing stimulus frequencies spike initiation began to assemble at a given phase of the stimulus cycle. The response patterns observed are discussed in relation to the primary process of mechanoreception of the chordotonal organ.
Suguru Ikeda; Yoshihiro Toh; Jun-ya Okamura; Jiro Okada
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Zoological science     Volume:  21     ISSN:  0289-0003     ISO Abbreviation:  Zool. Sci.     Publication Date:  2004 Apr 
Date Detail:
Created Date:  2004-04-30     Completed Date:  2004-08-09     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8702287     Medline TA:  Zoolog Sci     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  375-83     Citation Subset:  IM    
Department of Biology, Faculty of Science, Kyushu University, Fukuoka 812-8581, Japan.
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MeSH Terms
Action Potentials / physiology
Cockroaches / metabolism*
Mechanoreceptors / injuries,  metabolism*
Neurons, Afferent / metabolism,  physiology*
Physical Stimulation

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