We focused our studies on the regularity of time intervals in successive involuntary contractions among classical hemiballism, Huntington's chorea, vascular chorea (which included ballistic movements caused by lesions in the striatum), and the resting tremor in PD as a reference.
Regularity of muscular contractions in hemiballism by lesions in the subthalamic nucleus was greater than that in Huntington's chorea, but lower than that in vascular chorea (Fig.
Yanagisawa, "Persistent hemiballism with striatal hyperintensity on T1-weighted MRI in a diabetic patient: A 6-year follow-up study," Journal of the Neurological Sciences, vol.
Sato et al., "Two diabetics with hemichorea hemiballism and striatal lesions," No To Shinkei, vol.
who first reported 3 diabetic patients with the unique combination of hemiballism
and striatal hyperintensity on T1-weighted MRI as a new syndrome in 1994 .
Interestingly, D2 receptor agonists often result in the side-effect of dyskinesias, as does vascular damage to the STN ('hemiballism
Do unilateral ablative lesions of the subthalamic nucleus in parkinsonian patients lead to hemiballism
? Mov Disord 2001; 16:306-10.