| yellow fibres | Fibre's that are 0.2 to 2 um in diameter but may be larger in some ligaments; they branch and anastomose to form networks and fuse to form fenestrated membranes; the fibre's and membranes consist of microfibrils about 10 nm wide and an amorphous substance containing elastin. Synonym: yellow fibres. (05 Mar 2000) |
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| fastigiobulbar fibres | Nerve fibres projecting from the fastigial nuclei of the cerebellum to the brain stem; crossed and uncrossed fibres that terminate mainly in the vestibular and reticular nuclei, and in the medial accessory olivary nucleus. (05 Mar 2000) |
| fastigiospinal fibres | Crossed descending fibres originating in the fastigial nucleus of the cerebellum and ending in the spinal cord gray matter at cervical, and possibly lower, levels. (05 Mar 2000) |
| kinetochore fibres | Fibres of the mitotic spindle attached to the centromere and extending toward the poles. Compare: astral fibres, polar fibres. (05 Mar 2000) |
| unmyelinated 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) |
| zonular fibres | Delicate fibres that pass from the equator of the lens to the ciliary body, collectively known as the ciliary zonule. Synonym: fibrae zonulares. (05 Mar 2000) |
| km fibres | <cell biology> Bundles of microtubules running longitudinally below and to one side of the bases of cilia in a kinety. (17 Dec 1997) |
| Korff's fibres | Argyrophilic fibre's that pass between odontoblasts at the periphery of the dental pulp and fan out into the dentin. (05 Mar 2000) |
| fibres of lens | <biology, ophthalmology, physiology> The elongated cells of ectodermal origin forming the substance of the crystalline lens of the eye. Synonym: fibrae lentis. (05 Mar 2000) |