Linked Life Data

11846510

Source:http://linkedlifedata.com/resource/pubmed/id/11846510

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2002-2-15
pubmed:abstractText
Innervated myotendinous cylinders (IMCs) in rabbit extraocular muscles (EOMs) were identified for the first time. The nature of IMC nerve terminals was demonstrated by means of electron microscopy and double fluorescent staining. The distal EOM portions of four rabbits of different age and sex were prepared for transmission electron microscopy and for double-fluorescent labelling. Antibody against neurofilament H and alpha-bungarotoxin were applied on longitudinal cryostat sections of distal myotendinous junction. IMCs were consistently and frequently observed at the distal myotendons of each EOM. More than 30 IMCs were counted in two medial recti of a 6 month and 3 year old rabbit. IMCs were enveloped by two to three layered capsules of fibrocytes. Each IMC contained the terminal portion of one multiply-innervated muscle fibre and its corresponding tendon. The tendon compartment of an IMC was entered by a single myelinated nerve fibre (2-3 microm in diameter). Inside the IMC, this nerve fibre ramified into up to four preterminal branches. Nerve terminals exclusively established contacts with the muscle fibre at its junction with the tendon fibrils. Nerve terminals contained mitochondria and a multitude of clear vesicles. Within the synaptic cleft a basal lamina was always present. alpha-Bungarotoxin labelled the muscle side of these myoneural contacts. Nerve terminals exhibited neither age nor sex differences. Among all species so far investigated, rabbit IMCs are unique by exhibiting exclusively myoneural terminal contacts. Based on fine structure and alpha-bungarotoxin binding, myoneural contacts in rabbit IMCs are almost certainly motor, as previously observed only in human IMCs. Thus, rabbit IMCs are supposed to have a predominant effector function.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0014-4835
pubmed:author
pubmed:copyrightInfo
Copyright 2001 Academic Press.
pubmed:issnType
Print
pubmed:volume
73
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
787-96
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
2001
pubmed:articleTitle
Presence and structure of innervated myotendinous cylinders in rabbit extraocular muscle.
pubmed:affiliation
Department 2, Institute of Anatomy, University of Vienna, Währingerstrasse 13, Vienna, 1090, Austria. Roland.Blumer@univie.ac.at
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't