Document Detail

Electroantennogram of the American cockroach: effect of oxygen and an electrical model.
MedLine Citation:
PMID:  1507161     Owner:  NLM     Status:  MEDLINE    
1. With a view to clarifying the role of oxygen in the olfactory reception of insects, the intact antenna of the male American cockroach (Periplaneta americana) was studied under normal conditions and during reversible anoxia, external or tracheal, using an electroantennogram (EAG) elicited by a sex pheromone stimulation. As a first step, the anatomical and electrical characteristics of the antenna were investigated. 2. Based on the microanatomical study, a cockroach antenna was characterized by structural parameters reflecting the haemolymph and gas exchange in the antenna. Valves in the wall of a haemolymphatic vessel were discovered. 3. The resting DC background voltage (DCBV) and the EAG were continuously recorded and proved to be more strongly affected by tracheal anoxia than by anoxia from the outside. 4. A minimal electrical model of the antenna based on the Thurm-Kaissling-De Kramer equivalent circuit of a sensillum was shown to be valid to explain the origin of the DCBV and EAG as well as their changes after oxygen cutoff and resumption. 5. Two formal opposing processes, excitation and desensitization, probably related to the receptor mechanisms, have been used to interpret the kinetics of the EAG and the effect of anoxia on EAG parameters. The desensitization is thought to be more sensitive to oxygen lack than the excitation.
S V Kapitskii; F G Gribakin
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of comparative physiology. A, Sensory, neural, and behavioral physiology     Volume:  170     ISSN:  -     ISO Abbreviation:  J. Comp. Physiol. A     Publication Date:  1992 Jun 
Date Detail:
Created Date:  1992-09-22     Completed Date:  1992-09-22     Revised Date:  2014-07-21    
Medline Journal Info:
Nlm Unique ID:  8413199     Medline TA:  J Comp Physiol A     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  651-63     Citation Subset:  IM    
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MeSH Terms
Anoxia / physiopathology*
Models, Neurological
Periplaneta / physiology*
Pheromones / pharmacology
Sensation / drug effects,  physiology
Sense Organs / anatomy & histology,  physiology*
Smell / physiology
Reg. No./Substance:

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