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increased tone of the extensor muscles, related to injury of the vermis of the cerebellum.
a stiffness of the trunk muscles caused by a midline (vermal) lesion in the cerebellum. In some cases, the limbs may also be rigid and the neck and back arched, as in opisthotonos.
Stiffness of the body and extremities resulting from a lesion of the middle lobe of the cerebellum.
See also: rigidity