Posterior Alien Hand Syndrome from Acute Ischemic Left Parietal Lobe Infarction

Alien hand syndrome (AHS) is defined as an involuntary goal-directed movement of the hand as if acting on its own will, or as being under the control of someone else. Moreover, the affected hand typically does not show any signs of weakness or convulsive movement. The cause of AHS is associated with an insult to the brain from various conditions such as stroke, trauma, tumor, aneurysm, neurosurgical intervention, infection, and degenerative brain diseases. We hereby illustrate a case of a patient with chronic atrial dysrhythmia whose oral anticoagulation therapy was placed on hold by his gastroenterologist for a scheduled colonoscopy. The patient presented to the hospital with symptoms of right-hand paresthesia with uncontrolled movement. These symptoms were seen along ST-segment elevation in the inferior leads on a 12 lead electrocardiogram. The case report acknowledges an unusual presentation of acute ischemic stroke, which may be frightening and bewildering to patients, their families, and any healthcare providers, including neurologists, who may have encountered it for the first time. Also, our patient had posterior AHS, likely from infarction involving the left inferior parietal lobe, which is reported to have a low prevalence.