@article{ISI:000246940800006,
title = {Morphology and physiology of the prosternal chordotonal organ of the sarcophagid fly Sarcophaga bullata (Parker)},
author = {Heiko Stoelting and Andreas Stumpner and Reinhard Lakes-Harlan},
journal = {JOURNAL OF INSECT PHYSIOLOGY},
number = {5},
pages = {444-454},
volume = {53},
year = {2007},
abstract = {The anatomy and the physiology of the prosternal chordotonal organ
(pCO) within the prothorax of Sarcophaga bullata is analysed.
Neuroanatomical studies illustrate that the approximately 35 sensory
axons terminate within the median ventral association centre of the
different neuromeres of the thoracico-abdominal ganglion. At the
single-cell level two classes of receptor cells can be discriminated
physiologically and morphologically: receptor cells with dorso-lateral
branches in the mesothoracic neuromere are insensitive to frequencies
below approximately 1 kHz. Receptor cells without such branches respond
most sensitive at lower frequencies. Absolute thresholds vary between
0.2 and 8m/s(2) for different frequencies. The sensory information is
transmitted to the brain via ascending interneurons. Functional
analyses reveal a mechanical transmission of forced head rotations and
of foreleg vibrations to the attachment site of the pCO. In summed
action potential recordings a physiological correlate was found to
stimuli with parameters of leg vibrations, rather than to those of head
rotation. The data represent a first physiological study of a putative
predecessor organ of an insect ear. (C) 2007 Elsevier Ltd. All rights
reserved.},
issn = {0022-1910},
keywords = {IFZ evolution insect proprioception vibration }
}
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