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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Front+Physiol
2016 ; 7
(ä): 46
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Sequential Filtering Processes Shape Feature Detection in Crickets: A Framework
for Song Pattern Recognition
#MMPMID26941647
Hedwig BG
Front Physiol
2016[]; 7
(ä): 46
PMID26941647
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Intraspecific acoustic communication requires filtering processes and feature
detectors in the auditory pathway of the receiver for the recognition of
species-specific signals. Insects like acoustically communicating crickets allow
describing and analysing the mechanisms underlying auditory processing at the
behavioral and neural level. Female crickets approach male calling song, their
phonotactic behavior is tuned to the characteristic features of the song, such as
the carrier frequency and the temporal pattern of sound pulses. Data from
behavioral experiments and from neural recordings at different stages of
processing in the auditory pathway lead to a concept of serially arranged
filtering mechanisms. These encompass a filter for the carrier frequency at the
level of the hearing organ, and the pulse duration through phasic onset responses
of afferents and reciprocal inhibition of thoracic interneurons. Further,
processing by a delay line and coincidence detector circuit in the brain leads to
feature detecting neurons that specifically respond to the species-specific pulse
rate, and match the characteristics of the phonotactic response. This same
circuit may also control the response to the species-specific chirp pattern.
Based on these serial filters and the feature detecting mechanism, female
phonotactic behavior is shaped and tuned to the characteristic properties of male
calling song.
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