| subserous plexus | The subserous part of the enteric plexus of autonomic nerves. Synonym: plexus subserosus. (05 Mar 2000) |
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| superficial cardiac plexus | The superficial and smaller subdivision of the cardiac plexus, formed by the left superior cardiac nerves from the left vagus and cervical sympathetic trunk; it is found beneath the aortic arch, between the arch and the bifurcation of the pulmonary trunk. Synonym: plexus cardiacus superficialis. (05 Mar 2000) |
| superficial temporal plexus | An autonomic plexus of nerves on the artery of this name, derived from the external carotid plexus. Synonym: plexus temporalis superficialis. (05 Mar 2000) |
| superior dental branches of superior dental plexus | Branches passing from the superior dental plexus to the roots of the teeth of the upper jaw. Synonym: rami dentales superiores plexus dentalis superioris. (05 Mar 2000) |
| superior dental plexus | Formed by branches of the infraorbital nerve, it gives off superior dental branches to the upper and superior gingival branches to the gums. Synonym: plexus dentalis superior. (05 Mar 2000) |
| superior gingival branches of superior dental plexus | Branches of superior dental plexus to gingiva of upper jaw. Synonym: rami gingivales superiores plexus dentalis superioris. (05 Mar 2000) |
| superior haemorrhoidal plexus | The autonomic plexus derived as a continuation of the inferior mesenteric plexus that accompanies the superior rectal artery. Synonym: plexus rectalis superior, superior haemorrhoidal plexus. (05 Mar 2000) |
| superior hypogastric plexus | The continuation of the aortic plexus inferior to the aortic bifurcation across the fifth lumbar vertebra into the pelvis where it divides into two hypogastric nerves at the sides of the rectum; these join the pelvic splanchnic nerves to form the inferior hypogastric plexus's supplying pelvic viscera. Synonym: plexus hypogastricus superior, nervus presacralis, Latarget's nerve, presacral nerve. (05 Mar 2000) |
| superior rectal plexus | The autonomic plexus derived as a continuation of the inferior mesenteric plexus that accompanies the superior rectal artery. Synonym: plexus rectalis superior, superior haemorrhoidal plexus. (05 Mar 2000) |
| superior thyroid plexus | An autonomic plexus on the artery of the same name, derived from the external carotid plexus. Synonym: plexus thyroideus superior. (05 Mar 2000) |
| superior trunk of brachial plexus | The nerve bundle formed by the union of the ventral rami of the fifth and sixth cervical nerves and some fibres from the fourth; it contributes fibres to the posterior and lateral cords (fasciculi) of the brachial plexus. Synonym: truncus superior plexus brachialis. (05 Mar 2000) |
| deep cardiac plexus | The deeper part of the cardiac plexus. Synonym: plexus cardiacus profundus. (05 Mar 2000) |
| supraclavicular part of brachial plexus | The part of the brachial plexus, including the roots, trunks, and divisions, that gives rise to the dorsal scapular, long thoracic, suprascapular and subclavian nerves. Synonym: pars supraclavicularis plexus brachialis. (05 Mar 2000) |
| deferential plexus | An autonomic plexus on the seminal vesicle and ampulla of the ductus deferens on each side, derived from the inferior hypogastric plexus. Synonym: plexus deferentialis. (05 Mar 2000) |
| suprarenal plexus | An autonomic plexus formed mainly by branches from the coeliac ganglion, lying at the hilus of the suprarenal gland. Synonym: plexus suprarenalis. (05 Mar 2000) |