| parasympathetic root of ciliary ganglion | A branch of the oculomotor nerve supplying parasympathetic preganglionic nerve fibres to the ciliary ganglion. Synonym: radix parasympathica ganglii ciliaris, radix oculomotoria ganglii ciliaris, motor root of ciliary ganglion, oculomotor root of ciliary ganglion, radix brevis ganglii ciliaris, short root of ciliary ganglion. (05 Mar 2000) |
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| ganglia, parasympathetic | Ganglia of the parasympathetic nervous system, including the ciliary, pterygopalatine, submandibular, and otic ganglia in the cranial region and intrinsic (terminal) ganglia associated with target organs in the thorax and abdomen. (12 Dec 1998) |
| parasympathetic | Pertaining to a division of the autonomic nervous system. See: autonomic nervous system. (05 Mar 2000) |
| parasympathetic fibres, postganglionic | Nerve fibres which project from parasympathetic ganglia to synapses on target organs. Parasympathetic postganglionic fibres use acetylcholine as transmitter. They may also release peptide cotransmitters. (12 Dec 1998) |
| parasympathetic ganglia | Those ganglia of the autonomic nervous system composed of cholinergic neurons receiving afferent fibres from preganglionic visceral motor neurons in either the brainstem or the middle sacral spinal segments (S2 to S4); on the basis of their location with respect to the organs they innervate, most parasympathetic ganglia, at least outside the head, can be categorised as juxtamural or intramural ganglia. See: autonomic nervous system. (05 Mar 2000) |
| parasympathetic nerve | <anatomy, nerve> One of the nerve's of the parasympathetic nervous system. (05 Mar 2000) |
| parasympathetic nervous system | <anatomy, neurology> One of the two divisions of the vertebrate autonomic nervous sytem. Parasympathetic nerves emerge cranially as pre ganglionic fibres from oculomotor, facial, glossopharyngeal and vagus and from the sacral region of the spinal cord. most neurons are cholinergic and responses are mediated by muscarinic receptors. The parasympathetic system innervates, for example: salivary glands, thoracic and abdominal viscera, bladder and genitalia. Compare:. Sympathetic nervous system. (18 Nov 1997) |
| nervous system, parasympathetic | A part of the nervous system that slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles. The parasympathetic nervous system together with the sympathetic nervous system (that accelerates the heart rate, constricts blood vessels, and raises blood pressure) constitute the autonomic nervous system. (12 Dec 1998) |
| system, parasympathetic nervous | : A part of nervous system that slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles. The parasympathetic nervous system together with the sympathetic nervous system (that accelerates the heart rate, constricts blood vessels, and raises blood pressure) constitute the autonomic nervous system. (12 Dec 1998) |
| aberrant ganglion | A collection of nerve cells sometimes found on a posterior spinal nerve root between the spinal ganglion and the spinal cord. (05 Mar 2000) |
| acousticofacial ganglion | A primordial ganglionic cell mass in young embryos which later separates into the acoustic or spiral ganglion of the vestibulocochlear (eighth cranial) nerve and the geniculate ganglion of the facial (seventh cranial) nerve. (05 Mar 2000) |
| Acrel's ganglion | Pseudoganglion on the posterior interosseous nerve on the dorsal aspect of the wrist joint, a cyst on a tendon of an extensor muscle at the level of the wrist. (05 Mar 2000) |
| Andersch's ganglion | <anatomy, nerve> The lower of two sensory ganglion's on the glossopharyngeal nerve as it traverses the jugular foramen. Synonym: ganglion inferius nervi glossopharyngei, Andersch's ganglion, extracranial ganglia, ganglion extracraniale, petrosal ganglion, petrous ganglion. (05 Mar 2000) |
| Arnold's ganglion | An autonomic ganglion situated below the foramen ovale medial to the mandibular nerve; its postganglionic, parasympathetic fibres are distributed to the parotid gland. Synonym: ganglion oticum, Arnold's ganglion, auricular ganglion, otoganglion. (05 Mar 2000) |
| auditory ganglion | An elongated ganglion of bipolar sensory nerve cell bodies on the cochlear part of the vestibulocochlear nerve in the spiral canal of the modiolus; each ganglion cell gives rise to a peripheral process that passes between the layers of the bony spiral lamina to the organ of Corti, and a central axon that enters the hindbrain as a component of the inferior (cochlear) root of the eighth nerve. Synonym: ganglion spirale cochleae, auditory ganglion, cochlear ganglion, Corti's ganglion, spiral cochlear ganglion. (05 Mar 2000) |