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Dysdiadochokinesia (DDK) is the medical term for an impaired ability to perform rapid, alternating movements (i.e., diadochokinesia). Complete inability is called adiadochokinesia. The term is from Greek δυς dys "bad", διάδοχος diadochos "working in turn", κίνησις kinesis "movement". [2]
Many clinical tests may be employed to test for such disturbances. [3] Alternating movements: Patient is told e.g. to pronate and supinate their hands in rapid succession, holding forearms vertically. In cerebellar diseases, the movements are irregular and inaccurate; in case of the pyramidal tract lesion the motion may be slowed or incomplete.
inability to coordinate fine motor activities (intention tremor), e.g. "past-pointing" (pointing beyond the finger in the finger-nose test) inability to perform rapid alternating movements (dysdiadochokinesia), e.g. inability to rapidly flip the hands; involuntary horizontal eye movements
Pyramidal tract dysfunction can lead to various clinical presentations such as spasticity, weakness, slowing of rapid alternating movements, hyperreflexia, and a positive Babinski sign. [1] The pyramidal tract completes development and myelinization between 2 and 3 years of age. [2]
Hypokinetic movement disorders fall into one of four subcategories: akinesia (lack of movement), hypokinesia (reduced amplitude of movements), bradykinesia (slow movement), and rigidity. In primary movement disorders, the abnormal movement is the primary manifestation of the disorder.
The Abnormal Involuntary Movement Scale (AIMS) examination is a test used to identify the symptoms of tardive dyskinesia (TD). The test is not meant to tell whether there is an absence or presence of tardive dyskinesia. It just scales to the level of symptoms indicated by the actions observed. The levels range from none to severe.
The rapid eye movements that some Glut 1 patients exhibit are rapid, multidirectional, and there is often a head movement in the same direction as the eye movement. [11] These abnormal eye movements were recently named aberrant gaze saccades. [11] Hemiplegia or alternating intermittent hemiplegia may occur in some patients and mimic stroke-like ...
Dystonia is a neurological hyperkinetic movement disorder in which sustained or repetitive muscle contractions occur involuntarily, resulting in twisting and repetitive movements or abnormal fixed postures. [3] The movements may resemble a tremor. Dystonia is often intensified or exacerbated by physical activity, and symptoms may progress into ...