The quality or state of being rigid; want of pliability; the quality of resisting change of form; the amount of resistance with which a body opposes change of form; -- opposed to flexibility, ductility, malleability, and softness.
Rigidity is the force required to bend a strip of paper or board through a known angle. The instrument used is the Taber stiffness testing using an angle of 15°. The results are expressed in Taber stiffness tester units. The greater the value the more rigid the material.
inability to move any part of your body, despite the numerous attempts to do so; when rigidity is not so developed if any movements are possible at all, they are much more harder to perform than when being healthy
the name given to the special type of stiffness which is one of the main symptoms of Parkinson's. The muscle tend to pull against each other instead of working smoothly together. This is due to a failure of reciprocal relaxation of the antagonist muscles. There are two types: Cog wheel rigidity a term used to describe the type of intermittent resistance to movement found in Parkinson's Lead pipe rigidity a term used to describe the sustained resistance to movement found in Parkinson's and also cerebrovascular disease
If the limbs of a Parkinson's patient are moved passively, the muscles will often contract involuntarily, causing rigidity. This rigidity may be constant or intermittent. Intermittent rigidity is called cogwheel rigidity.
Abnormal stiffness in a limb or other body part. It is most apparent when an examiner moves a patient's limb -- as in cogwheeling. Shy-Drager Syndrome (Multiple System Atrophy) A degenerative condition characterized by low blood pressure when standing. It may lead to parkinsonism, rigidity, ataxia, fainting, or incontinence.