Document Server@UHasselt >
Research >
Research publications >

Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/3310

Title: Encapsulated Ruffini-like endings in human lumbar facet joints
Authors: VANDENABEELE, Frank
JANS, Marc
Issue Date: 1997
Citation: JOURNAL OF ANATOMY, 191(4). p. 571-583
Abstract: The innervation of the human lumbar facet joint capsule was studied by light and electron microscopy. Small numbers of encapsulated corpuscular endings were identified in the dense fibrous layer. Clusters of 2 types of endings were found: small cylindrical corpuscles (type 1) and large fusiform corpuscles (type 2). The corpuscles were classified structurally as Ruffini-type endings. The 1st type was predominant and characterised by a compartmentalised receptor complex, a thin perineurial capsule and a narrow subcapsular space. The 2nd type was characterised by a thicker perineurial capsule, a 'spindle-like' receptive complex, and an extensive subcapsular space with capillaries and concentrically oriented fibroblast-like cells. Both types of endings were innervated mainly by thinly myelinated group III (A delta) and unmyelinated group IV (C) nerve fibres that branched and terminated in the receptor complex. Their sensory endings were intimately related to the collagen fibre bundles as multiple enlarged axonal segments ('beads') with ultrastructural features which were characteristic of receptive sites: an accumulation of mitochondria and vesicles, and 'bare' areas of axolemma lacking a Schwann cell investment but covered by a thin basal lamina. Some beads in the 2nd type of ending contained granular vesicles, 30-60 mm in diameter, resembling sympathetic nerve endings. Small diameter collagen fibrils situated within multilayered basal laminae were found among the multiple receptive sites in the receptive complex in both types of ending. Their possible functional significance in mechanoreception is discussed. Particular attention has been given to their apparent variable orientation to the mechanoreceptive site.
Notes: Limburgs Univ Ctr, Dept Basic Med Sci, Fac Med, B-3590 Diepenbeek, Belgium.Vandenabeele, F, Limburgs Univ Ctr, Dept Basic Med Sci, Fac Med, Univ Campus, B-3590 Diepenbeek, Belgium.
URI: http://hdl.handle.net/1942/3310
DOI: 10.1046/j.1469-7580.1997.19140571.x
ISI #: 000071471600011
ISSN: 0021-8782
Type: Journal Contribution
Validation: ecoom, 1999
Appears in Collections: Research publications

Files in This Item:

There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.