OBJECTIVE Four types of antipsychotic-induced movement disorders: tardive dyskinesia (TD), parkinsonism, akathisia and tardive dystonia, subtypes of TD (orofacial and limb truncal dyskinesia), subtypes of parkinsonism (rest tremor, rigidity, and bradykinesia), as well as a principal-factor of the movement disorders and their subtypes, were examined for association with variation in 7 candidate ...

Schizophrenia is a devastating psychiatric disorder that affects 1% of population worldwide. Neuroleptics are the major class of drugs used in the treatment of schizophrenia. Neuroleptics are associated with wide variety of extrapyramidal side effects such as akathesia, dystonia, neuroleptic malignant syndrome, Parkinsonism and tardive dyskinesia. tardive dyskinesia is a complex hyperkinetic sy...

Schizophrenia is a devastating psychiatric disorder that affects 1% of population worldwide. Neuroleptics are the major class of drugs used in the treatment of schizophrenia. Neuroleptics are associated with wide variety of extrapyramidal side effects such as akathesia, dystonia, neuroleptic malignant syndrome, Parkinsonism and tardive dyskinesia. tardive dyskinesia is a complex hyperkinetic sy...

The endomorphins are recently discovered endogenous agonists for the mu-opioid receptor (Zadina et al., 1997). Endomorphins produce analgesia; however, their role in other brain functions has not been elucidated. We have investigated the behavioral effects of endomorphin-1 in the globus pallidus, a brain region that is rich in mu-opioid receptors and involved in motor control. Bilateral adminis...

A 30-year-old man with a history of generalized epilepsy presented with progressively worsening involuntary movements for 2 years. He had no family history of movement disorders. He had orofacial choreiform movements with sucking, grimacing, and neck flexion, which were exacerbated with eating. He also had oral ulcers due to involuntary biting. Blood smear showed 20% acanthocytes. Nerve conduct...

Neuroacanthocytosis is an autosomal recessive neurodegenerative disease, characterized by chorea, dementia, seizure, acanthocytes on peripheral blood smear and caudate atrophy on brain magnetic resonance imaging (MRI).1,2 These patients have severe orofacial dyskinesia and especially eating dystonia that causes severe eating problems and tongue and cheek biting. Eating or feeding dystonia, in c...

Objective: Aging is a continuous and intrinsic process of systems deterioration with time. Although the mean prevalence of tardive dyskinesia (TD), a neurological disorder associated with chronic haloperidol administration, is 20-25%, the cumulative rate of this disorder increases significantly in patients aged 55 years or more. The present study investigated the effect of aging on spontaneous ...