| nervus petrosus minor | <anatomy, nerve> The parasympathetic root of the otic ganglion, derived from the tympanic plexus; it leaves the tympanic cavity through the canal for the lesser petrosal nerve and passes within the cranium to the sphenopetrosal fissure, or to the foramen ovale, or to the petrosal foramen through which it descends to reach the otic ganglion; conveys presynaptic parasympathetic fibres from the glossopharyngeal nerve concerned with secretomotor innervation of the perotid gland. Synonym: nervus petrosus minor, lesser petrosal nerve. (05 Mar 2000) |
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| nervus petrosus profundus | <anatomy, nerve> The deep petrosal branch of the internal carotid plexus, which joins the greater petrosal nerve at the entrance of the pterygoid canal to provide postsynaptic fibres to nerve of the pterygoid canal. Synonym: nervus petrosus profundus. (05 Mar 2000) |
| nervus phrenicus | <anatomy, nerve> The motor nerve of the diaphragm. The phrenic nerve fibres originate in the cervical spinal column (mostly c4) and travel through the cervical plexus to the diaphragm. (12 Dec 1998) |
| nervus plantaris lateralis | <anatomy, nerve> One of the two terminal branches of the tibial nerve; it courses along the lateral side of the sole, dividing into superficial and deep branches; it supplies the skin of the lateral aspect of the sole and the lateral one and one-half toes; it innervates the intrinsic muscles of the plantar part of the foot with the exception of the abductor hallucis and the flexor digitorum brevis; its distribution in the foot is very similar to that of the ulnar nerve in the hand. Synonym: nervus plantaris lateralis. (05 Mar 2000) |
| nervus plantaris medialis | <anatomy, nerve> One of the two terminal branches of the tibial nerve; it courses along the medial aspect of the sole to supply the abductor hallucis and flexor digitorum brevis and, by way of common and proper digital branches, to innervate the skin of the medial part of the foot and medial three and one-half toes. Synonym: nervus plantaris medialis. (05 Mar 2000) |
| nervus presacralis | An alternate term for superior hypogastric plexus. (05 Mar 2000) |
| nervus pterygoideus | <anatomy, nerve> One of two motor branches, lateral and medial, of the mandibular nerve, supplying the lateral and medial pterygoid muscles with fibres of the motor root of the trigeninal nerve. Synonym: nervus pterygoideus. (05 Mar 2000) |
| nervus pudendus | <anatomy, nerve> Formed by fibres from the ventral primary rami of the second, third, and fourth sacral spinal nerves; it exits the pelvis via the greater sciatic foramen, passes posterior to the sacrospinous ligament, and accompanies the internal pudendal artery, into the perineum via the lesser sciatic foramen; it gives off inferior rectal nerves, then courses through the pudendal canal in the lateral wall of the ischiorectal fossa, terminating as the dorsal nerve of the penis or of the clitoris. Synonym: nervus pudendus, plexus pudendus nervosus, pudic nerve. (05 Mar 2000) |
| nervus radialis | <anatomy, nerve> A major nerve of the upper extremity. In humans the fibres of the radial nerve originate in the lower cervical and upper thoracic spinal cord (usually c5 to t1), travel via the posterior cord of the brachial plexus, and supply motor innervation to extensor muscles of the arm and cutaneous sensory fibres to extensor regions of the arm and hand. (12 Dec 1998) |
| nervus saccularis | <anatomy, nerve> A branch of the vestibular nerve going to the macula of the sacculus. Synonym: nervus saccularis. (05 Mar 2000) |
| nervus saphenus | <anatomy, nerve> A branch of the femoral, extending from the femoral triangle to the foot, becoming subcutaneous on the medial side of the knee; it supplies cutaneous branches to the skin of the leg and foot, by way of infrapatellar and medial crural branches. Synonym: nervus saphenus, internal saphenous nerve, long saphenous nerve. (05 Mar 2000) |
| nervus sciaticus | An alternate term for sciatic nerve. (05 Mar 2000) |
| nervus spermaticus externus | <anatomy, nerve> Branch of genitofemoral nerve distributed to skin of anterior scrotum (male) or labia majora (female) and adjacent thigh and supplying a motor branch to the cremaster muscle. Usually passes through deep inguinal ring and canal. Synonym: ramus genitalis nervi genitofemoralis, external spermatic nerve, nervus spermaticus externus. (05 Mar 2000) |
| nervus spinosus | <anatomy, nerve> A recurrent branch of the mandibular nerve that passes superiorly through foramen spinosum to be distributed with the posterior division of the middle meningeal artery to the meninges of the posterior portion of the middle cranial fossa. Synonym: ramus meningeus nervi mandibularis, nervus spinosus. (05 Mar 2000) |
| nervus splanchnicus imus | <anatomy, nerve> One of the abdominopelvic splanchnic nerves arising in the thorax and penetrating the diaphragm to supply presynaptic sympathetic fibres for the renal plexus; often combined with the lesser splanchnic nerve, but occasionally existing as an independent nerve. Synonym: nervus splanchnicus imus, smallest splanchnic nerve. (05 Mar 2000) |