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Directional sensitivity of an identified wind-sensitive interneuron during the postembryonic development of the locust.

Abstract：

:Simultaneous extracellular recordings from both locust abdominal connectives show a differential activation of both bilateral homologues of an identified long projection interneuron (A4I1) in response to wind stimuli from different directions. Despite the previously shown extensive structural dynamics of sensory afferents and synaptic rearrangement of the direct afferent-to-interneuron connections during postembryonic development, a directional sensitivity is already present in first instar nymphs. Only quantitative changes in the strength of the directional response can be detected. Intracellular stainings of the A4I1 interneuron in first instar nymphs and adults show that general morphological features do not change during postembryonic development, in contrast to the presynaptic sensory afferents. This also holds for general morphological features of pleuroaxillary flight motoneurons. The output connections of A4I1 to these motoneurons and an unidentified intersegmental interneuron are already present in flightless nymphs.

journal_name

J Insect Physiol

journal_title

Journal of insect physiology

authors

Bucher D,Pflüger H

doi

10.1016/s0022-1910(00)00078-0

keywords:

subject

Has Abstract

pub_date

2000-12-01 00:00:00

pages

1545-1556

issue

12

eissn

0022-1910

issn

1879-1611

pii

S0022191000000780

journal_volume

46

pub_type

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