<unk>  is one of the characteristic<unk> s of a upper motor neurone lesion. It refers to a stretch reflex with a rapid decrease in resistance when attempting to flex a joint, usually during a neurological examination.
It gets its name from the resemblance between the motion of the limb and the sudden closing of a<unk><unk>  after sufficient pressure is applied.
Clasp-knife response
Palpitation pathophysiology
Otalgia classification
Astereognosis
Referred pain
Bone or cartilage mass classification
Luminous intensity
Vocal resonation