Dysdiadochokinesia is an impairment of
A. Successive finger movements
B. Heel-to-toe walking
C. Rapid alternating movements
D. Tremor suppression
A. Successive finger movements
B. Heel-to-toe walking
C. Rapid alternating movements
D. Tremor suppression
Ans. C. Dysdiadochokinesia is
usually apparent with cerebellar damage. It is most evident when strength and
sensation are intact. Alternately tapping one side of the hand and then the
other, or tapping the heel and then alternating with the toe of the foot, is
the test usually employed to check this aspect of coordination. Multiple
sclerosis in adults and cerebellar tumors in children are two of many causes of
problems with this part of the neurologic examination. Focal lesions in the
nervous system may produce highly asymmetric dysdiadochokinesia. A variety of
movement disorders, such as parkinsonism and choreoathetosis, may interfere
with rapid alternating movements and give the false impression that the patient
has a lesion in systems solely responsible for coordination
