Evidence indicates that damage to the right hemisphere often results from a stroke or pre-existing hemispatial neglect, or inattention to the left visual field (Antoniello, 2016) (Keenan, 2004).
Individuals who suffer from somatoparaphrenia, a specific form of asomatognosia, ignore or deny ownership of a body part contralateral to the brain lesion (Feinberg, 1990).
According to Gerstmann's (1942) definition, asomatognosia was described as the "imperception of the affected limbs or body half, in various degrees from simple forgetting to obstinate denial of their existence."
[9][10][11] In most commonly observed instances, individuals with this condition fail to recognize and sense their left arm after suffering lesions to the right hemisphere (Keenan, 2004).
Out of these varieties of asomatognosia, autopagnosia is the only one in which an individual struggles to recognize the right side of their body due to lesions in the left parietal cortex (Whishaw, 2015).