Universität zu Köln

Daun-Gruhn, Silvia, Toth, Tibor I. and Borgmann, Anke (2011). Dominance of local sensory signals over inter-segmental effects in a motor system: modeling studies. Biol. Cybern., 105 (5-6). S. 413 - 427. NEW YORK: SPRINGER. ISSN 1432-0770

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Abstract

Recent experiments, reported in the accompanying paper, have supplied key data on the impact afferent excitation has on the activity of the levator-depressor motor system of an extremity in the stick insect. The main finding was that, stimulation of the campaniform sensillae of the partially amputated middle leg in an animal where all other but one front leg had been removed, had a dominating effect over that of the stepping ipsilateral front leg. In fact, the latter effect was minute compared to the former. In this article, we propose a local network that involves the neuronal part of the levator-depressor motor system and use it to elucidate the mechanisms that underlie the generation of neuronal activity in the experiments. In particular, we show that by appropriately modulating the activity in the neurons of the central pattern generator of the levator-depressor motor system, we obtain activity patterns of the motoneurons in the model that closely resemble those found in extracellular recordings in the stick insect. In addition, our model predicts specific properties of these records which depend on the stimuli applied to the stick insect leg. We also discuss our results on the segmental mechanisms in the context of inter-segmental coordination.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Daun-Gruhn, Silvia UNSPECIFIED UNSPECIFIED UNSPECIFIED Toth, Tibor I. UNSPECIFIED UNSPECIFIED UNSPECIFIED Borgmann, Anke UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-483709
DOI:	10.1007/s00422-012-0474-x
Journal or Publication Title:	Biol. Cybern.
Volume:	105
Number:	5-6
Page Range:	S. 413 - 427
Date:	2011
Publisher:	SPRINGER
Place of Publication:	NEW YORK
ISSN:	1432-0770
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CENTRAL PATTERN GENERATORS; INSECT WALKING SYSTEM; STICK INSECT; INTERSEGMENTAL COORDINATION; FICTIVE LOCOMOTION; LEG; MOVEMENTS; LOCUST; INTERNEURONS; ORGANIZATION Multiple languages Computer Science, Cybernetics; Neurosciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/48370