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This Viewpoint cautions against the premature adoption and implementation of biological definitions for Parkinson disease proposed in February 2024.

This cohort study assesses rates of thromboembolic events in adults with atrial fibrillation (AF) and epilepsy receiving direct-acting oral anticoagulants (OACs) and enzyme-inducing antiseizure medications (ASMs) vs direct-acting OACs with non–enzyme-inducing ASMs.

This cohort study evaluates clinical events identified as relapses not associated with T2 lesions or gadolinium-enhanced T1 lesions on magnetic resonance imaging.

This cohort study assesses the derivation and validation of International Statistical Classification of Diseases, Tenth Revision (ICD-10) codes in detecting incident stroke events in Medicare inpatient fee-for-service claims data.

This case report describes a patient experiencing involuntary contractions in his right pectoralis muscles with anti-Tr antibodies in his serum, which is characteristic of myorhythmia.