Actually due to lesions inš§ Corpus callosum and supplementary motor area in brain one hand acts independently - may grasp, touch or interfere with tasks.
Major sign is involuntary, purposeful movements in a limb, without the patientās conscious intention⦠Patient feels like an alien controlling his hand since he himself is not doing it..
Alien hand syndrome is a rare neurological condition where one hand performs involuntary movements, acting independently of the personās will, often caused by brain injury, surgery, or neurodegenerative disorders.