| corticobulbar tract | <physiology> Collective term for those fibres (corticonuclear fibres) which separate from the corticospinal tract in the course of the latter's descent through the pons and medulla oblongata. Fibres of this tract innervate the motor nuclei of the trigeminal, facial, and hypoglossal nerves (perhaps also the nucleus ambiguus), directly and by way of interneurons in the lateral part of the rhombencephalic tegmentum. No direct supranuclear cortical innervation of the motor nuclei innervating the external eye muscles (oculomotor, trochlear, abducens) has been identified. Fibres of the corticobulbar tract also project into the formatio reticularis (i.e., corticoreticular fibres) and terminate upon sensory relay nuclei (e.g., gracile and cuneate nuclei, nucleus spinalis trigeminalis and nucleus solitarius). Synonym: tractus corticobulbaris. (05 Mar 2000) |
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| corticocerebellum | Phylogenetic term referring to the larger lateral portion of the cerebellar hemisphere receiving its dominant input from the pontine nuclei which, in turn, are dominated by afferent nerves originating from all parts of the cerebral cortex; phylogenetically, of more recent origin than the archicerebellum and paleocerebellum, q.v., the neocerebellum reaches its largest development in humans and other primates. Synonym: corticocerebellum. (05 Mar 2000) |
| corticoefferent | Passing in a direction away from the outer surface; denoting especially nerve fibres conveying impulses away from the cerebral cortex. Synonym: corticoefferent, corticofugal. Origin: L. Cortex, rind, bark, + fugio, to flee (05 Mar 2000) |
| corticofugal | Passing in a direction away from the outer surface; denoting especially nerve fibres conveying impulses away from the cerebral cortex. Synonym: corticoefferent, corticofugal. Origin: L. Cortex, rind, bark, + fugio, to flee (05 Mar 2000) |
| corticoid | 1. Having an action similar to that of a hormone of the adrenal cortex. 2. Any substance exhibiting this action. Synonym: corticosteroid. (05 Mar 2000) |
| corticoliberin | <endocrinology, physiology> A neuropeptide released by the hypothalamus that stimulates the release of corticotropin by the anterior pituitary gland. Chemical name: Corticotropin-releasing factor Synonym: corticoliberin, corticotropin releasing factor. (12 Dec 1998) |
| corticomedial | Cortical and medial; specifically used to refer to one of the two major cytological divisions of the amygdaloid complex. See: corpus amygdaloideum. (05 Mar 2000) |
| corticonuclear fibre | <physiology> Descriptive term connotating fibres from a cortical structure (cerebral or cerebellar) passing to subcortical cell groups; fibres comprising the tractus corticobulbaris; cerebellar corticonuclear fibres (Purkinje cell axons to the cerebellar nuclei). Synonym: fibrae corticonucleares. (05 Mar 2000) |
| corticopontine fibre | <physiology> The fibres that compose the corticopontine tract. Synonym: fibrae corticopontinae. (05 Mar 2000) |
| corticopontine tract | <anatomy, physiology> Collective term for the multitude of fibres which, originating in all of the major subdivisions of the cerebral cortex, descend in the internal capsule and crus cerebri to terminate in the nuclei of the ventral part of the pons. Individual components of this massive fibre system are indicated, according to their origin in the cerebral cortex, as the frontopontine tract, parietopontine tract, occipitopontine tract, and temporopontine tract. Synonym: tractus corticopontini. (05 Mar 2000) |
| corticoreticular fibre | <physiology> Corticofugal fibres distributed to the reticular formation of the mesencephalon and rhombencephalon. See: corticobulbar fibres. Synonym: fibrae corticoreticulares. (05 Mar 2000) |
| corticorubral fibre | <physiology> Nerve fibres projecting from the cerebral cortex (primarily precentral and premotor regions) to the red nucleus of the midbrain. (05 Mar 2000) |
| corticospinal fibres | The fibres that compose the pyramidal tract (corticospinalis). Synonym: fibrae corticospinales, corticospinal fibres, fibrae pyramidales. (05 Mar 2000) |
| corticospinal tract | A massive bundle of fibres originating from pyramidal cells of various sizes in the fifth layer of the precentral motor (area 4), the premotor area (area 6), and to a lesser extent from the postcentral gyrus. Cells of origin in area 4 include the gigantopyramidal cells of Betz. Fibres from these cortical regions descend through the internal capsule, the middle third of the crus cerebri, and the ventral part of the pons to emerge on the ventral surface of the medulla oblongata as the pyramis. Continuing caudally, most of the fibres cross to the opposite side in the pyramidal decussation and descend in the dorsal half of the lateral funiculus of the spinal cord as the lateral pyramidal tract, which distributes its fibres throughout the length of the spinal cord to interneurons of the zona intermedia of the spinal gray matter. In the (extremity-related) spinal cord enlargements, fibres also pass directly to motoneuronal groups that innervate distal extremity muscles subserving particular hand-and-finger or foot-and-toe movements. The uncrossed fibres form a small bundle, the anterior pyramidal tract, which descends in the anterior funiculus of the spinal cord and terminates in synaptic contact with interneurons in the medial half of the anterior horn on both sides of the spinal cord. Interruption of the pyramidal tract at or below its cortical origin causes impairment of movement in the opposite body-half, especially severe in the arm and leg; characterised by muscular weakness, spasticity and hyperreflexia, and a loss of discrete finger and hand movements. Babinski's sign is associated with this condition of hemiplegia. Synonym: tractus corticospinalis, tractus pyramidalis, corticospinal tract. (05 Mar 2000) |
| corticostatin | <endocrinology, physiology> Name given to some defensins because they inhibit corticotropin induced corticosteroid production. (18 Nov 1997) |
| cortical cataract |
1. developmental punctate opacity common in the cortex and present in most lenses. The cataract is white or cerulean, increases in number with age, but rarely affects vision. 2. cuneiform c..
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| corticotropin-like intermediate lobe peptide |
(CLIP) a peptide with a sequence identical to the C-terminal 22 residues of adrenocorticotropic hormone, found in the intermediate lobe of the pituitary gland in lower animals; the function, if any, is unknown. It is also produced by human fetuses and may be a regulator of the fetal adrenal glands.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| cortex |
In botany the cortex is the outer portion of the stem or root of a plant, bounded on the outside by the epidermis and on the inside by the pericycle. It is composed mostly of undifferentiated cells, usually large thin-walled parenchyma cells. The outer cortical cells often acquire irregularly thickened cell walls, and are called collenchyma cells. Some of the outer cortical cells may contain chloroplasts. ...
출처: en.wikipedia.org/wiki/Cortex_(botany)
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| Cortef |
(Cor
출처: www.merckmedicus.com/pp/us/hcp/thcp_dorlands_conte...
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| cortex |
Primary tissue of a stem or root, bounded externally by the epidermis and internally in the stem by the phloem and in the root by the pericycle.
출처: www.fao.org/docrep/003/X3910E/X3910E06.htm
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