| ventral tegmental area | A region in the mesencephalon which is dorsomedial to the substantia nigra and ventral to the red nucleus. The mesocortical and mesolimbic dopaminergic systems originate here, including an important projection to the nucleus accumbens. Overactivity of the cells in this area has been suspected to contribute to the positive symptoms of schizophrenia. (12 Dec 1998) |
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| ventral tegmental decussation | See: tegmental decussations. (05 Mar 2000) |
| ventral thalamic peduncle | The massive system of fibre bundles emerging through the ventral, lateral, and anterior borders of the thalamus to join the internal capsule and parts of the corona radiata; it contains the fibres reciprocally connecting the ventral thalamic nuclei with the precentral and postcentral gyri of the cerebral cortex. Synonym: pedunculus thalami ventralis. (05 Mar 2000) |
| ventral tier thalamic nuclei | Collective term for nuclei in the ventral part of the lateral nuclear group, e.g., ventral anterior, lateral, posterolateral, and posteromedial nuclei and the medial and lateral geniculate bodies. The basoventral nuclear complex constitutes the caudal part of the ventral tier thalamic nuclei. (05 Mar 2000) |
| ventral white column | A narrow band of white substance bordering on the anterior median fissure of the spinal cord in front of the anterior gray commissure, and consisting of nerve fibres crossing over from one half of the spinal cord to the other. Synonym: commissura alba, anterior white commissure, commissura ventralis alba, ventral white column. (05 Mar 2000) |
| lateral ventral hernia | Abdominal hernia through the semilunar line. Synonym: lateral ventral hernia. (05 Mar 2000) |
| communicating branches of auriculotemporal nerve to facial nerve | <anatomy, nerve> Branches conveying fibres from the auriculotemporal nerve to the facial nerve. Synonym: rami communicantes nervi auriculotemporalis cum nervo faciali. (05 Mar 2000) |
| communicating branches of lingual nerve to hypoglossal nerve | <anatomy, nerve> Communicating branches between the lingual nerve (from mandibular nerve) and hypoglossal nerve forming a plexus on the hypoglossus muscle. Synonym: rami communicantes nervi lingualis cum nervo hypoglosso. (05 Mar 2000) |
| communicating branch of facial nerve with glossopharyngeal nerve | <anatomy, nerve> A small branch from the digastric branch of the facial nerve to the glossopharyngeal nerve. Synonym: ramus communicans cum nervo glossopharyngeo, Haller's ansa. (05 Mar 2000) |
| communicating branch of glossopharyngeal nerve with auricular branch of vagus nerve | <anatomy, nerve> A small branch of the glossopharyngeal nerve which joins the auricular branch of the vagus, conveying tactile fibres. Synonym: ramus communicans cum nervo glossopharyngeo, ramus communicans nervi glossopharyngei cum ramo auriculari nervi vagalis. (05 Mar 2000) |
| communicating branch of lacrimal nerve with zygomatic nerve | <anatomy, nerve> Nerve branch by which postsynaptic parasympathetic (secretomotor) fibres from the pterygopalatine ganglion are transferred from the zygomatic nerve to the lacrimal nerve (heretofore purely sensory) for distribution to the lacrimal gland. Synonym: ramus communicans nervi lacrimalis cum nervo zygomatico. (05 Mar 2000) |
| communicating branch of median nerve with ulnar nerve | <anatomy, nerve> Branch of median nerve joining the ulnar nerve in the hand; the anterior interosseous branch of the median nerve may also communicate with the ulnar nerve in the proximal forearm. Synonym: ramus communicans nervi mediani cum nervo ulnari. (05 Mar 2000) |
| communicating branch of superior laryngeal nerve with recurrent laryngeal nerve | <anatomy, nerve> Branch of internal branch of superior laryngeal nerve communicating with the recurrent laryngeal nerve in the wall of the laryngopharynx supplying sensory fibres to the latter. Synonym: ramus communicans nervi laryngei recurrentis cum ramo laryngeo interno, ramus communicans nervi laryngei superioris cum nervo laryngeo recurrenti, Galen's anastomosis, Galen's nerve. (05 Mar 2000) |
| acute spinal cord compression | <radiology> Signs and symptoms of cord compression show progression within 24 hours or less: pain, weakness, autonomic dysfunction, sensory loss, ataxia Diagnostic considerations: Primary or secondary malignancy of epidural space or vertebrae, Trauma, Inflammatory process, Osteoarthritis REF: MacNeil BJ, Abrams HL. Brigham and Women's Hospital Handbook of Diagnostic Imaging. Chapter 35. (12 Dec 1998) |
| anterior median fissure of spinal cord | A deep median fissure on the anterior surface of the spinal cord. Synonym: fissura mediana anterior medullae spinalis, anteromedian groove, sulcus ventralis. (05 Mar 2000) |