| pyramidal fibres | The fibres that compose the pyramidal tract (corticospinalis). Synonym: fibrae corticospinales, corticospinal fibres, fibrae pyramidales. (05 Mar 2000) |
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| Sharpey's fibres | Bundles of collagenous fibre's that pass into the outer circumferential lamellae of bone or the cementum of teeth. Synonym: Sharpey's fibres. (05 Mar 2000) |
| skeletal muscle fibres | Multinucleated contractile cells varying from less than 10 to 100 um in diameter and from less than 1 mm to several centimeters in length; the fibre consists of sarcoplasm and cross-striated myofibrils, which in turn consist of myofilaments; human skeletal muscles are a mixture of red, white, and intermediate type fibre's. (05 Mar 2000) |
| hypothalamocerebellar fibres | Nerve fibres originating from cells in the hypothalamus and projecting to the cerebellar cortex and nuclei. (05 Mar 2000) |
| spinoreticular fibres | Nerve fibres originating from the spinal cord and terminating in the reticular formation of the brainstem. Synonym: spinoreticular tract. (05 Mar 2000) |
| Nelaton's fibres | See: transverse rectal folds. Synonym: Nelaton's fibres. (05 Mar 2000) |
| nerve fibres | Slender processes of neurons, especially the prolonged axons that conduct nerve impulses. (12 Dec 1998) |
| nerve fibres, myelinated | Grayish white nerve fibres whose axons are encased in a myelin sheath which may in turn be enclosed by a neurilemma (a thin membrane spirally enwrapping the myelin layers). (12 Dec 1998) |
| striatonigral fibres | Nerve fibres originating from cells of the caudate and putamen and terminating mainly in the pars reticulata of the substantia nigra; they utilise GABA and substance P. Synonym: striatonigral fibres. (05 Mar 2000) |
| strionigral fibres | Nerve fibres originating from cells of the caudate and putamen and terminating mainly in the pars reticulata of the substantia nigra; they utilise GABA and substance P. Synonym: striatonigral fibres. (05 Mar 2000) |
| nodoventricular fibres | Paraspecific fibre's originating from the A-V node, the His bundle, or the bundle branches and inserting into the ventricular myocardium; they are potential pathways for reentrant dysrhythmias. Synonym: nodoventricular fibres. (05 Mar 2000) |
| nonmedullated fibres | A fibre having no myelin covering (CNS); a naked axon; in the PNS represented by all axons lying in troughs in a single Schwann cell (Schwann cell unit); a slow conducting fibre. Synonym: gray fibres, nonmedullated fibres, Remak's fibres. (05 Mar 2000) |
| sudomotor fibres | Postganglionic and cholinergic sympathetic nerve fibre's that innervate the sweat glands. (05 Mar 2000) |
| nucleocortical fibres | General term for projections from a nucleus to an overlying cortical structure; specifically used to designate axons of cerebellar nuclear cells that project to the cerebellar cortex (cerebellar nucleocortical fibres) where they end as mossy fibres. (05 Mar 2000) |
| sustentacular fibres of retina | Sustentacular neuroglial cells of the retina running through the thickness of the retina from the internal limiting membrane to the bases of the rods and cones where they form a row of junctional complexes. Synonym: Muller's radial cells, sustentacular fibres of retina. (05 Mar 2000) |