start-ver=1.4
cd-journal=joma
no-vol=204
cd-vols=
no-issue=20
article-no=
start-page=3411
end-page=3423
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2001
dt-pub=200110
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Functional organisation of anterior thoracic stretch receptors in the deep-sea isopod Bathynomus doederleini: Behavioural, morphological and physiological studies
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=<p>The relationship between segmental mobility and the
organisation of thoracic stretch receptors was examined in
the deep-sea isopod Bathynomus doederleini, which shows
a developed adaptive behaviour during digging. The
movements of segments during digging were analysed
from video recordings, which showed that a large
excursion occurred in the anterior thoracic segments. Dyefills
of axons revealed four types of thoracic stretch
receptor (TSR): an N-cell type (TSR-1), a differentiated Ncell
type (TSR-2), a muscle receptor organ (MRO)-type
with a long, single receptor muscle (TSR-3) and an MROtype
with a short, single receptor muscle (TSR-4 to
TSR-7).
Physiologically, TSR-1 and TSR-2 are tonic-type stretch
receptors. TSR-3 to TSR-7 show two kinds of stretchactivated
responses, a tonic response and a phasico-tonic
response in which responses are maintained as long as the
stretch stimulus is delivered. Both TSR-2, with a long
muscle strand, and TSR-3, with a single, long receptor
muscle, have a wide dynamic range in their stretchactivated
response. In addition, TSR-2 is controlled by an
intersegmental inhibitory reflex from TSR-3. These results
suggest that, although TSR-1 has no receptor muscle and
TSR-2 has a less-differentiated receptor-like muscle, they
are fully functional position detectors of segmental
movements, as are the MRO-type receptors TSR-3 to
TSR-7.</p>
en-copyright=
kn-copyright=

en-aut-name=IwasakiMasazumi
en-aut-sei=Iwasaki
en-aut-mei=Masazumi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=OhataAyako
en-aut-sei=Ohata
en-aut-mei=Ayako
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=OkadaYoshinori
en-aut-sei=Okada
en-aut-mei=Yoshinori
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=SekiguchiHideo
en-aut-sei=Sekiguchi
en-aut-mei=Hideo
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

en-aut-name=NiidaAkiyoshi
en-aut-sei=Niida
en-aut-mei=Akiyoshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=

affil-num=1
en-affil=
kn-affil=Okayama  University

affil-num=2
en-affil=
kn-affil=Okayama  University

affil-num=3
en-affil=
kn-affil=Okayama University

affil-num=4
en-affil=
kn-affil=Mie University

affil-num=5
en-affil=
kn-affil=Okayama University
en-keyword=stretch receptor
kn-keyword=stretch receptor
en-keyword=muscle receptor organ
kn-keyword=muscle receptor organ
en-keyword=N-cell
kn-keyword=N-cell
en-keyword=accessory neurone
kn-keyword=accessory neurone
en-keyword=crayfish
kn-keyword=crayfish
en-keyword=Crustacea
kn-keyword=Crustacea
en-keyword=isopod
kn-keyword=isopod
en-keyword=Bathynomus
kn-keyword=Bathynomus
en-keyword=doederleini.
kn-keyword=doederleini.
END