Aliens hand syndrome
This syndrome is characterized by the belief that one's hand has an impact in their lives and doesn’t belong to oneself. Individuals experencing alien hand syndrome have normal sensation but feel their hand is autonomous. Those with alien hand syndrome may personify the limb as a separate entity: The unaffected hand is under the individual’s control while the affected hand has its own agenda. This syndrome may occur in individuals who have damage to the corpus callosum, which connects the two cerebral hemispheres of the brain. Other causes include stroke and damage to the parietal lobe. The hands then appear to be in “intermanual conflict” or “ideomotor apraxia,” meaning they act in opposition to one another.