A 64-year-old male presented to us with sudden, brief, abrupt, jerky involuntary movements of both upper limbs, referred to asmyoclonus. On further work-up, the patient was found to have uncontrolled diabetes with absent ketones. Other causes ofmyoclonus were excluded, and on MRI of the brain no abnormality was found which could explain these movements. After strictglycaemic control with insulin, these movements disappeared confirming this as a neurological complication of diabetes.Cerebraldysfunction due to hyperglycaemia without hyperosmolarity resulted in these abnormal movements. This article reveals theimportance that diabetes should be considered in the differential diagnosis of all neurological conditions as it can affect any partof the nervous system leading to varied clinical presentations such as myoclonus; even this neurological manifestation can presentas the first sign/symptom of diabetes. Strict glycaemic control is the only modality of treatment needed in such cases
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