Determinants of pain interference and headache impact in patients who have chronic migraine with medication overuse: Results from the MOTS trial.

Objective: "Pain interference" and "headache impact" refer to negative consequences that pain and headache have on one's life. This study investigated determinants of these negative impacts in a large patient cohort who have chronic migraine with medication overuse.

Methods: Six hundred and eleven adults were enrolled from 34 headache, neurology, and primary care clinics.

Stiff person syndrome.

Recognizing stiff person syndrome is clinically important. It is uncommon, characterized by body stiffness associated with painful muscle spasms, and varies in location and severity. It is subdivided into stiff trunk versus stiff limb presentation, and as a progressive encephalomyelitis.