Other Movement Disorders

Serotonin Syndrome

Serotonin syndrome, potentially life-threatening, results from excess serotonergic activity. Caused by drug interactions or self-poisoning, it exhibits altered mental state, hyperactivity, and neuromuscular issues. Treatment involves discontinuing agents, supportive care, benzodiazepines, serotonin antagonists, and sometimes paralysis and intubation.

Neuroleptic Malignant Syndrome

Neuroleptic malignant syndrome (NMS) is a life-threatening condition associated with antipsychotic drugs. It presents with altered mental status, fever, rigidity, and dysautonomia. Treatment includes stopping the causative agent, supportive care, medications like dantrolene, bromocriptine, amantadine, benzodiazepines, and, in severe cases, electroconvulsive therapy (ECT). Restarting antipsychotics should be done with caution and expert guidance, starting with low doses of lower-potency agents while monitoring for NMS symptoms, and avoiding concomitant lithium and dehydration.

Tic Disorders

Tics, common in Tourette syndrome (TS), are managed with education, behavioral therapy (HRT), and medications like VMAT2 inhibitors, antipsychotics, alpha adrenergic agents, or topiramate. Severe cases may benefit from deep brain stimulation (DBS). Comorbid conditions like ADHD and OCD may require SSRIs, alpha adrenergic agonists, or CNS stimulants.

Hemichorea

Hemichorea is characterized by one-sided involuntary movements and can result from various causes. Treatment depends on the underlying condition and may involve addressing the cause, withdrawing medications, using dopamine blockers, VMAT2 inhibitors, or other medications. In severe cases, surgical options like DBS may be considered.

Chorea

Chorea is a hyperkinetic movement disorder with various causes. Treatment depends on the underlying condition. In Huntington's disease, dopamine depleting agents like tetrabenazine are used. Other treatments include antipsychotics and surgical options. Chorea in Sydenham chorea may be treated with antibiotics and chorea-suppressing medications. Wilson's disease is managed with copper-chelating agents and zinc acetate.

Essential Tremor

Essential Tremor (ET) is a common cause of action tremor. Mild cases may not require treatment, while intermittent symptoms may be managed with drugs like propranolol or primidone. Severe and drug-resistant cases may benefit from surgical options like deep brain stimulation or thalamotomy.

Dystonia new

Dystonia is an extrapyramidal disorder characterized by repetitive muscle contractions leading to abnormal postures and movements. Treatment includes non-pharmacological approaches, various oral medications, botulinum toxin injections, and deep brain stimulation for severe cases.

Dopa Responsive Dystonia

Dopa Responsive Dystonia (DRD), resembling juvenile Parkinson's, is effectively treated with Levodopa, typically 100-750 mg daily, either alone or with carbidopa. This treatment provides long-term symptom relief without motor complications. Ineffectiveness of Levodopa warrants reevaluation of the diagnosis.

Dyskinesias

Dyskinesias include acute dyskinesia from dopamine blockers in Parkinson's, tardive dyskinesia from prolonged anti-dopaminergic use, peak dose dyskinesia in Parkinson's due to Levodopa, spontaneous dyskinesia in the general population, and Meige syndrome (cranial dystonia), treatable with zolpidem. Management varies based on the type and cause.

Tardive Dyskinesia

Tardive dyskinesia, a result of long-term anti-dopaminergic medication use, is treated by discontinuing the causative agent, switching to safer antipsychotics, and using VMAT2 inhibitors, botulinum toxin, benzodiazepines, anticholinergics, or amantadine. Deep brain stimulation is considered for severe, treatment-resistant cases.