| stereotactic | Precise positioning in three dimensional space. Refers to surgery or radiation therapy directed by various scanning devices. (16 Dec 1997) |
|---|---|
| stereotactic cordotomy | See: cordotomy. (05 Mar 2000) |
| stereotactic instrument | Stereotaxic instrument, an apparatus attached to the head, used to localise precisely an area in the brain by means of coordinates related to intracerebral structures. (05 Mar 2000) |
| stereotactic needle biopsy | Biopsy done while breast is compressed under mammography. A series of pictures locate the lesion, and a radiologist enters information into a computer. The computer calculates information and positions a needle to remove the finding. A needle is inserted into the lump, and a piece of tissue is removed and sent to the lab for analysis. May be referred to as mammotest or core biopsy. (09 Oct 1997) |
| stereotactic radiosurgery | A radiation therapy technique that uses a large number of narrow, precisely aimed, highly focused beams of ionising radiation. The beams are aimed from many directions circling the head and meet at a specific point. (16 Dec 1997) |
| stereotactic surgery | A precise method of destroying deep-seated brain structures located by use of three-dimensional coordinates. Synonym: stereoencephalotomy, stereotactic surgery, stereotaxic surgery, stereotaxis. (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) |
| Schwartz tractotomy | A medullary 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) |