<unk>  is a feature of cerebellar ataxia and may be the result of lesions to either the cerebellar hemispheres or the frontal lobe (of the cerebrum), it can also be a combination of both. It is thought to be caused by the inability to switch on and switch off antagonising muscle groups in a coordinated fashion due to hypotonia, secondary to the central lesion.<unk>  is also seen in Friedreich's ataxia and multiple sclerosis, as a cerebellar symptom (including ataxia, intention tremor and dysarthria). It is also a feature of ataxic dysarthria.<unk>  often presents in motor speech disorders (dysarthria), therefore testing for<unk>  can be used for a differential diagnosis.<unk>  has been linked to a mutation in SLC18A2, which encodes vesicular monoamine transporter 2 (VMAT2).
Dysdiadochokinesia
Diadochokinesia
Hypokinesia
Adiadochokinesia
Xanthochromia
Chromoplexy
Aniridia
Hyperspermia