| RP | radial pulse; radiopharmaceutical; rapid processing [of film]; Raynaud phenomenon; reactive protein;... |
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| RT | radiologic technologist; radiotelemetry; radiotherapy; radium therapy; rapid tranquilization; reacti... |
| rtl | rectal |
| SRU | sample ratio units; side rails up; solitary rectal ulcer; structural repeating unit |
| SRUS | solitary rectal ulcer syndrome |
| pelvic splanchnic nerves | Visceral branches from the ventral primary rami of the second, third, and fourth sacral spinal nerves that join the inferior hypogastric plexus, to form the pelvic plexuses to and from which they convey presynaptic parasympathetic and sensory fibres, respectively. Synonym: nervi pelvici splanchnici, nervi erigentes. (05 Mar 2000) |
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| cervical nerves | Nerves arising from the cervical segments of the spinal cord. Synonym: nervi cervicales. (05 Mar 2000) |
| cervical splanchnic nerves | Segments of the visceral branches arising from the superior, middle, and inferior (stellate) cervical ganglia; they are part of the cardiopulmonary splanchnic nerves. Synonym: augmentor nerves. (05 Mar 2000) |
| meningeal branch of spinal nerves | A branch from the initial (mixed) part of each spinal nerve passing in a recurrent fashion back through the intervertebral foramen to supply spinal meninges, the posterior longitudinal ligament, posterolateral periphery of the intervertebral disc, and periosteum of the vertebrae. Synonym: ramus meningeus nervorum spinalium, recurrent meningeal branch of spinal nerves, sinuvertebral nerves. (05 Mar 2000) |
| perineal nerves | The superficial terminal branches of the pudendal nerve, supplying most of the muscles of the perineum (deep branch) as well as the skin of that region (superficial branch). Synonym: nervi perineales. (05 Mar 2000) |
| peripheral nerves | The nerves outside of the brain and spinal cord, including the autonomic, cranial, and spinal nerves. Peripheral nerves contain non-neuronal cells and connective tissue as well as axons. The connective tissue layers include, from the outside to the inside, the epineurium, the perineurium, and the endoneurium. (12 Dec 1998) |
| middle cluneal nerves | Terminal branches of the dorsal primary rami of the sacral nerves, supplying the skin of the mid-gluteal region. Synonym: nervi clunium medii. (05 Mar 2000) |
| common palmar digital nerves | Four nerves in the palm that send branches (proper palmar digital nerves) to adjacent sides of two digits; three are branches of the median, one is from the ulnar. Synonym: nervi digitales palmares communes. (05 Mar 2000) |
| common plantar digital nerves | Three nerves derived from the medial plantar and one from the lateral plantar that supply the skin overlying the metatarsals and terminate as proper plantar digital nerves to the side of each toe. Synonym: nervi digitales plantares communes. (05 Mar 2000) |
| communicating branches of spinal nerves | Short nerves arising from the initial portion of the ventral primary rami of the thoracic and upper lumbar spinal nerves through which all presynaptic sympathetic nerve fibres must pass to reach the sympathetic trunks; also conveyed by the white rami communicans are visceral afferent (sensory) fibres which were conveyed to the sympathetic trunks in splanchnic nerves. Most fibres conveyed by the white rami communicantes are myelinated. Synonym: rami communicantes nervorum spinalium, communicating branches of spinal nerves. (05 Mar 2000) |
| communicating rami of spinal nerves | The communicating branches of spinal nerves, small bundles of nerve fibres connecting spinal nerves with sympathetic ganglia; the fibres passing from the ganglion to the spinal nerve are nonmyelinated and are called gray rami communicantes, those passing in the reverse direction are myelinated and are called white rami communicantes. (05 Mar 2000) |
| plexus of spinal nerves | An intermingling of fibre fascicles from adjacent spinal nerves to form a network; the major plexus's are the cervical, brachial, and lumbosacral. Synonym: plexus nervorum spinalium. (05 Mar 2000) |
| cranial nerves | <anatomy> There are 12 cranial nerves. The olfactory nerve, optic nerve, occulomotor nerve, trochlear nerve, trigeminal nerve, abducent nerve, facial nerve, vestibulocochlear nerve, glossopharyngeal nerve, vagus nerve, accessory nerve and the hypoglossal nerve. (18 Nov 1997) |
| posterior branch of spinal nerves | See: dorsal primary ramus of spinal nerve. (05 Mar 2000) |
| posterior labial nerves | Terminal branches of the superficial perineal nerve, supplying the skin of the posterior portion of the labia and the vestibule of the vagina, corresponding to the posterior scrotal nerves in the male. Synonym: nervi labiales posteriores. (05 Mar 2000) |