| Schwartz tractotomy | A medullary spinothalamic tractotomy. (05 Mar 2000) |
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| Watson-Schwartz test | A qualitative screening test for diagnosis of acute intermittent porphyria by the addition of Ehrlich's reagent and saturated sodium acetate to the urine; a pink or red colour indicates the presence of porphobilinogen or urobilinogen; the former indicates porphyria, the latter does not; therefore, positive results require further differential extraction with butanol and chloroform to eliminate false-positive results due to urobilinogen. (05 Mar 2000) |
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| Schwartz, Henry | <person> U.S. Neurosurgeon, *1909. See: Schwartz tractotomy. (05 Mar 2000) |
| Schwartz, Oscar | <person> U.S. Paediatrician, *1919. See: Schwartz syndrome. (05 Mar 2000) |
| Schwartz syndrome | <syndrome> A congenital disorder characterised by myotonic myopathy, dystrophy of epiphyseal cartilages resulting in dwarfism, joint contractures, blepharophimosis, and characteristic facies; autosomal recessive inheritance. (05 Mar 2000) |
| anterolateral tractotomy | Division of the anterolateral quadrant of the spinal cord to section the spinothalamic tract. Synonym: anterolateral tractotomy, spinal tractotomy, spinothalamic cordotomy. (05 Mar 2000) |
| Walker tractotomy | A mesencephalic spinothalamic tractotomy. (05 Mar 2000) |
| pyramidal tractotomy | May be mesencephalic (pedunculotomy or crusotomy), medullary (medullary pyramidotomy), or spinal (spinal pyramidotomy). (05 Mar 2000) |
| Sjoqvist tractotomy | Division of the descending fibres of the trigeminal tract in the medulla. Synonym: intramedullary tractotomy, Sjoqvist tractotomy. (05 Mar 2000) |
| spinal tractotomy | Division of the anterolateral quadrant of the spinal cord to section the spinothalamic tract. Synonym: anterolateral tractotomy, spinal tractotomy, spinothalamic cordotomy. (05 Mar 2000) |
| spinothalamic tractotomy | May be spinal (cordotomy), medullary (Schwartz tractotomy), or mesencephalic (Walker tractotomy). (05 Mar 2000) |
| intramedullary tractotomy | Division of the descending fibres of the trigeminal tract in the medulla. Synonym: intramedullary tractotomy, Sjoqvist tractotomy. (05 Mar 2000) |
| tractotomy | Interruption of a nerve tract in the brainstem or spinal cord. Origin: L. Tractus, tract, + G. Tome, incision (05 Mar 2000) |
| trigeminal tractotomy | Division of the descending fibres of the trigeminal tract in the medulla. Synonym: intramedullary tractotomy, Sjoqvist tractotomy. (05 Mar 2000) |