| 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) |
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| 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) |
| dental fibres | <dentistry> The processes of the pulpal cells, the odontoblasts, which extend in radial fashion through the dentin to the dentoenamel junction and are contained within the dentinal tubules. The intertubular fine collagenous fibre's that with the dentinal ground substance infiltrated with calcium salts constitutes the dentinal matrix. Synonym: Tomes' fibres. (05 Mar 2000) |
| sympathetic fibres, postganglionic | Nerve fibres which project from sympathetic ganglia to synapses on target organs. Sympathetic postganglionic fibres use norepinephrine as transmitter, except for those innervating eccrine sweat glands (and possibly some blood vessels) which use acetylcholine. They may also release peptide cotransmitters. (12 Dec 1998) |
| dentatorubral fibres | Nerve fibres arising in the dentate nucleus of the cerebellum and projecting, via the superior cerebellar peduncle and its decussation, to the contralateral red nucleus of the midbrain. Synonym: fibrae dentatorubrales. (05 Mar 2000) |
| dentatothalamic fibres | Nerve fibres projecting from the dentate nucleus of the cerebellum to the contralateral thalamus via the superior cerebellar peduncle (and its decussation); enter the thalamus as one component of the thalamic fasciculus. (05 Mar 2000) |
| depressor fibres | Sensory nerve fibre's having pressure-sensitive nerve endings in the wall of certain arteries capable of activating blood pressure-lowering brainstem mechanisms when stimulated by an increase in intra-arterial pressure. (05 Mar 2000) |
| inhibitory fibres | Nerve fibre's that inhibit the activity of the nerve cells with which they have synaptic connections, or of the effector tissue (smooth muscle, heart muscle, glands) in which they terminate. (05 Mar 2000) |
| intercolumnar fibres | Horizontal arched fibres that pass from the inguinal ligament across the medial and lateral crura of the superficial inguinal ring. Synonym: fibrae intercrurales, intercolumnar fasciae, intercolumnar fibres. (05 Mar 2000) |
| intercrural fibres | Horizontal arched fibres that pass from the inguinal ligament across the medial and lateral crura of the superficial inguinal ring. Synonym: fibrae intercrurales, intercolumnar fasciae, intercolumnar fibres. (05 Mar 2000) |
| internal arcuate fibres | <anatomy> Fibres that arise in the cuneate and gracile nuclei, pass in a curving course across the midline of the medulla oblongata, and form the contralateral medial lemniscus. It also designates other fibres such as those of the olivocerebellar tract that arch through the substance of the medulla and form sensory decussation. Synonym: fibrae arcuatae internae. (05 Mar 2000) |
| intrafusal fibres | Muscle fibre's present within a neuromuscular spindle. (05 Mar 2000) |
| intrinsic fibres | Nerve fibre's interconnecting subdivisions of the cerebral cortex of the same hemisphere or different segments of the spinal cord on the same side. Synonym: endogenous fibres, intrinsic fibres. (05 Mar 2000) |
| oblique fibres of stomach | The smooth muscle fibres of the innermost layer of the muscular coat of the stomach; the fibres occur chiefly at the cardiac end of the stomach and spread over the anterior and posterior surfaces. Synonym: fibrae obliquae gastrici. (05 Mar 2000) |
| olivocochlear fibres | A bundle of fibres that originates from the periolivary nuclei bilaterally, exits the brainstem on the vestibular nerve, joins the cochlear nerve in the inner ear, and terminates on outer hair cells. Synonym: bundle of Rasmussen, olivocochlear fibres. (05 Mar 2000) |