spacer gif spacer gif spacer gif spacer gif spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Newland, P. L.
Right arrow Articles by Nagayama, T.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Newland, P. L.
Right arrow Articles by Nagayama, T.

Journal of Experimental Biology, Vol 198, Issue 11 2397-2404, Copyright © 1995 by Company of Biologists

JOURNAL ARTICLES

The structure, response properties and development of a hair plate on the mesothoracic leg of the locust

PL Newland, B Watkins, NJ Emptage and T Nagayama
Department of Zoology, University of Cambridge, UK.

A hair plate is present on the proximal anterior face of the pro- and mesothoracic tibiae of the legs of the locust Schistocerca gregaria, but not on the metathoracic legs. The hair plate is in a depression of the cuticle and contains about 11 hairs, which are all polarised with their tips pointing towards the dorsal surface of the tibia. The hairs are all of the same trichoid sensilla type and vary in length from 90 to 140 microns. Associated with the hair plate is a pronounced distal extension of the anterior femoral coverplate, the inner face of which is concave, that makes contact with the hairs during flexion and extension movements of the tibia. During postembryonic development, no tibial hair plate hairs are present in the first four larval stages. In fifth-instar larvae just three hairs are present, while the full complement is attained only after the final moult to adulthood. The distal extension of the posterior coverplate is present through all instar stages, becoming more pronounced after each moult. Sensory neurones innervating the hairs of an adult may be divided into two classes on the basis of their responses. The first type responds phasically to imposed deflections and is velocity-sensitive. The second type responds phasotonically and is also sensitive to the velocity of the stimulus but has an additional tonic component sensitive to maintained angular deflections. Both types of afferents are directionally sensitive and respond best to deflections against the natural bend of the hair, equivalent to extension movements of the tibia.(ABSTRACT TRUNCATED AT 250 WORDS)


This article has been cited by other articles:


Home page
 J. Exp. Biol.Home page
H. Fischer, H. Wolf, and A. Buschges
The locust tegula: kinematic parameters and activity pattern during the wing stroke
J. Exp. Biol., June 1, 2002; 205(11): 1531 - 1545.
[Abstract] [Full Text] [PDF]

Home page
 J. Exp. Biol.Home page
J. Okada and Y. Toh
Peripheral representation of antennal orientation by the scapal hair plate of the cockroach Periplaneta americana
J. Exp. Biol., March 14, 2002; 204(24): 4301 - 4309.
[Abstract] [Full Text] [PDF]


© The Company of Biologists Ltd 1995