In asomatognosia, patients are no longer able to identify body parts as belonging to their own body and therefore perceive them as foreign. For example, patients report feeling that the affected limb is missing or has disappeared[^1]. Asomatognosia is a specific form of agnosia and belongs to the somatosensory agnosias.
Cause
Asomatognosia results from a large lesion in the temporoparietal region, usually in the right hemisphere. Additional involvement of the orbitofrontal cortex can lead to somatoparaphrenia[^2].