Motoneurone discharges to the eyecup muscles of the crab Carcinus

dc.contributor.authorBurrows, M.
dc.contributor.authorHorridge, George Adrian
dc.date.accessioned2019-09-09T00:45:39Z
dc.date.available2019-09-09T00:45:39Z
dc.date.issued1968-10-01
dc.description.abstractSummary 1. During imposed tilt the eyecup or the crab tends to preserve an absolute position which depends upon the tonic activity of eight of the nine eyecup muscles. The detailed activity of all these muscles during imposed tilt in different planes has been recorded intracellularly. 2. The slow- and fast-motoneurone discharges to the eyecup muscles differ in that the former have intervals which are more variable at lower frequencies but the latter are more variable at higher frequencies. 3. The standard deviation of the interval between impulses is 20-30% of the mean interval for a wide range of frequencies of the tonic motoneurones. This large scatter is tolerable because the slow muscle fibres are sluggish and because the eyecup is also visually stabilized by a system of long time-constant. 4. In roll the two eyecups move in opposite directions relative to the midline of the animal. In pitch the two eyecups move in the same direction relative to the body of the animal, but in neither case is there a correlation between individual impulses to the muscles of the right and left eyecups which are active at the same time. 5. Possible mechanisms of linkage between the two eyecups are discussed.en_AU
dc.format.extent17 pagesen_AU
dc.format.mimetypeapplication/pdf
dc.identifier.issn0022-0949en_AU
dc.identifier.urihttp://hdl.handle.net/1885/165905
dc.language.isoen_AU
dc.provenancehttp://sherpa.ac.uk/romeo/issn/0022-0949/ Author can archive publisher's version/PDF. Publisher's version/PDF may be used (Sherpa/Romeo as of 9/9/2019)en_AU
dc.publisherCompany of Biologistsen_AU
dc.rights© 1968 The Company of Biologists Ltden_AU
dc.sourceJournal of Experimental Biologyen_AU
dc.subjecteyecupen_AU
dc.subjectcraben_AU
dc.subjectCarcinusen_AU
dc.subjectmotoneuroneen_AU
dc.subjectmuscleen_AU
dc.titleMotoneurone discharges to the eyecup muscles of the crab Carcinusen_AU
dc.typeJournal articleen_AU
dcterms.accessRightsOpen Accessen_AU
local.bibliographicCitation.issue2en_AU
local.bibliographicCitation.lastpage267en_AU
local.bibliographicCitation.startpage251en_AU
local.contributor.affiliationHorridge, George Adrian, Division of Biomedical Science and Biochemistry, CoS Research School of Biology, The Australian National Universityen_AU
local.contributor.authoremailu690072@anu.edu.auen_AU
local.contributor.authoruidHorridge, George Adrian, u690072en_AU
local.description.notesAt the time of publication the author was affiliated with the Gatty Marine Laboratory and Department of Natural History, University of St Andrews, Fife, Scotland.en_AU
local.identifier.citationvolume49en_AU
local.identifier.essn1477-9145en_AU
local.identifier.uidSubmittedByu4579722en_AU
local.publisher.urlhttps://www.biologists.com/en_AU
local.type.statusPublished Versionen_AU

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