Rebound Phenomenon

Rebound Phenomenon

This is one feature of the impaired checking response seen in cerebellar disease, along with dysdiadochokinesia and macrographia. It may be demonstrated by observing an overshoot of the outstretched arms when they are released suddenly after being pressed down by the examiner, or suddenly releasing the forearm flexed against resistance so that it hits the chest (Stewart-Holmes sign). Although previously attributed to hypotonia, it is more likely a reflection of asynergia between agonist and antagonist muscles.

Cross References

Asynergia; Ataxia; Dysdiadochokinesia; Dysmetria; Hypotonia, Hypotonus; Macrographia