(from the article `sensory reception, human`) ...born with total absence of the pain sense, there may not be demonstrable anatomic abnormality. Still other instances of dissociation of pain ... Found on http://www.britannica.com/eb/a-z/t/69
<procedure> Interruption of a nerve tract in the brainstem or spinal cord. ... Origin: L. Tractus, tract, + G. Tome, incision ... (05 Mar 2000) ... Found on http://www.encyclo.co.uk/local/20973
(trak-tot´ә-me) transection of a nerve tract in the central nervous system, usually for the relief of intractable pain. Found on http://www.encyclo.co.uk/local/21001