Category: S
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Superciliary arch
A curved process of the frontal bone lying just above the orbit, subjacent to the eyebrow, and directly above the supraorbital notch.
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Stump appendicitis
Inflammation occurring in the surgical remnant (the proximal portion of the appendix) after appendectomy.
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Spastic aphonia
Aphonia resulting from spasm of the vocal muscles, especially that initiated by efforts to speak.
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Syntactic aphasia
Inability to use proper grammatical constructions.
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Sensory aphasia
Inability to understand spoken words if the auditory word center is involved (auditory aphasia) or written words if the visual word center is affected (word blindness). If both centers are involved, the patient will understand neither spoken nor written words. A condition marked by challenges in comprehending spoken or written language, typically attributed to damage…
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Semantic aphasia
Inability to understand the meanings of words.
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Soluble antigen
An antigen dissolved in a liquid. A soluble antigen is recognized by B lymphocytes but cannot be detected by T lymphocytes until it has been processed by an antigen-presenting cell.
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Suspended animation
Temporary cessation of vital functions with loss of consciousness; state of apparent death.
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Angle of treitz
Sharp curve at the duodenojejunal junction.
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Sphenoid angle
The angle formed at the top of the sella turcica by the intersection of lines drawn from the nasal point and the tip of the rostrum of the sphenoid.