Category: S
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Subarachnoid space
A space between the arachnoid membrane and the pia mater in the brain, containing cerebrospinal fluid. Space located under the arachnoid membrane and above the pia mater of the meninges and containing cerebrospinal fluid. A type of spinal anesthesia, often used for obstetrical and gynecological procedures, is achieved by injecting an anesthetic agent into the…
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Subarachnoid haemorrhage
Bleeding into the cerebrospinal fluid of the subarachnoid space. A haemorrhage into the subarachnoid space in the brain. It is usually the result of rupture of an aneurysm on the circle of willis. Head injury or intense physical exercise occasionally cause subarachnoid haemorrhage; the diagnosis is confirmed by CT scan or by identifying blood in…
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Subacute sclerosing panencephalitis
A rare inflammatory disease of the brain, mostly affecting children. It is linked to having measles at a very young age, and is usually fatal. Subacute sclerosing panencephalitis (SSPE), or Dawson encephalitis, is a progressive, usually fatal neurological disorder typically affecting only children and adolescents. SSPE causes intellectual deterioration, convulsive seizures, and motor abnormalities. A…
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Subacute combined degeneration of the spinal cord
A condition, caused by Vitamin B12 deficiency, in which the sensory and motor nerves in the spinal cord become damaged and the person has difficulty in moving. Gradual harm to nerve pathways within the spinal cord resulting from insufficient vitamin B12 is known as subacute combined degeneration of the spinal cord. This condition can emerge…
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Subacute infective endocarditis
An infection of the membrane covering the inner surfaces of the heart caused by bacteria.
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Subabdominal
Beneath the abdomen.
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Styptic pencil
A stick of alum, used to stop bleeding from small cuts.
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Stylus
A long thin instrument used for applying antiseptics or ointments to the skin. A pencil-shaped instrument, commonly used for applying external medication; for example, to apply silver nitrate to warts. A probe or slender wire for stiffening or clearing a canal or catheter.
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Styloid process
A piece of bone which projects from the bottom of the temporal bone. A long slender downward pointing spine projecting from the lower surface of the temporal bone of the skull. It provides attachment for muscles and ligaments of the tongue and hyoid bone. A pointed process of the temporal bone, projecting downward, and to…
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Styloglossus
A muscle which links the tongue to the styloid process. A muscle that extends from the tongue to the styloid process of the temporal bone. It serves to draw the tongue upward and backward. A muscle connecting the tongue and styloid process that raises and retracts the tongue.