<prompt> Features of parkinsons disease-Decreased BlinkingRigidityOn-off phenomenonObjective downside arrow muscle power  <response>: Rigidity is seen in Parkinsons disease. Two types : 1 Cogwheel type, mostly upper limbsdue to tremor superimposed on rigidity 2 Lead pipe rigidity Rigidity causes stiffness and flexed posture. Ref Harrison20th edition pg 1567 