Features of parkinsons disease-: (A) Decreased Blinking, (B) Rigidity, (C) On-off phenomenon, (D) Objective (downside arrow) muscle power
Answer is B. Rigidity is seen in Parkinson's disease. Two types : 1) Cogwheel type, mostly upper limbs(due to tremor superimposed on rigidity) 2) Lead pipe rigidity Rigidity causes stiffness and flexed posture. Ref Harrison20th edition pg 1567