Rules for localising a lesion
For each neurological deficit a line is constructed which follows the route of the main sensory or motor pathways.
- rule 1:
- if all the lines intersect at one point then the lesion is situated at the point of intersection
- if all the lines intersect at one point then the lesion is situated at the point of intersection
- rule 2:
- if the lines intersect at more then one point then one must test for deficits which might be predicted from lesions at the various different intersection points
- if the lines intersect at more then one point then one must test for deficits which might be predicted from lesions at the various different intersection points
- rule 3:
- if the findings cannot be explained by a single lesion then attempt to determine two causative lesions
- if the findings cannot be explained by a single lesion then attempt to determine two causative lesions
- rule 4:
- if more than two lesions are required to explain the findings then the disorder is considered to be multifocal
- one should determine what is the common characteristic about all the lesions
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