Universität zu Köln

Zill, Sasha N., Chaudhry, Sumaiya, Exter, Annelie, Bueschges, Ansgar and Schmitz, Josef (2014). Positive force feedback in development of substrate grip in the stick insect tarsus. Arthropod Struct. Dev., 43 (5). S. 441 - 456. OXFORD: ELSEVIER SCI LTD. ISSN 1873-5495

Full text not available from this repository.

Abstract

The mechanics of substrate adhesion has recently been intensively studied in insects but less is known about the sensorimotor control of substrate engagement. We characterized the responses and motor effects of tarsal campaniform sensilla in stick insects to understand how sensory signals of force could contribute to substrate grip. The tarsi consist of a chain of segments linked by highly flexible articulations. Morphological studies showed that one to four campaniform sensilla are located on the distal end of each segment. Activities of the receptors were recorded neurographically and sensilla were identified by stimulation and ablation of their cuticular caps. Responses were characterized to bending forces and axial loads, muscle contractions and to forces applied to the retractor apodeme (tendon). The tarsal sensilla effectively encoded both the rate and amplitude of loads and muscle forces, but only when movement was resisted. Mechanical stimulation of the receptors produced activation of motor neurons in the retractor unguis and tibial flexor muscles. These findings indicate that campaniform sensilla can provide information about the effectiveness of the leg muscles in generating substrate adherence. They can also produce positive force feedback that could contribute to the development of substrate grip and stabilization of the tarsal chain. (C) 2014 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zill, Sasha N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chaudhry, Sumaiya UNSPECIFIED UNSPECIFIED UNSPECIFIED Exter, Annelie UNSPECIFIED UNSPECIFIED UNSPECIFIED Bueschges, Ansgar UNSPECIFIED UNSPECIFIED UNSPECIFIED Schmitz, Josef UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-431009
DOI:	10.1016/j.asd.2014.06.002
Journal or Publication Title:	Arthropod Struct. Dev.
Volume:	43
Number:	5
Page Range:	S. 441 - 456
Date:	2014
Publisher:	ELSEVIER SCI LTD
Place of Publication:	OXFORD
ISSN:	1873-5495
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language TIBIAL CAMPANIFORM SENSILLA; RETRACTOR UNGUIS MUSCLE; ATTACHMENT PADS; MOTOR OUTPUT; MOVEMENTS; LEG; COCKROACH; SMOOTH; DESIGN; INNERVATION Multiple languages Entomology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/43100