<prompt> Features of pyramidal tract lesion are all exceptClasp knife rigidityInvoluntary movementsPositive Babinski signExaggerated reflexes increased tone  <response>: Babinski sign is the sure sign of pyramidal tractcorticospinal lesion.Spasticity and exaggerated tendon reflexes are due to extrapyramidal lesions. Since pyramidal lesion occurring alone is rare, extrapyramidal lesions also may be seen. Rigidity seen is clasp knife type. 