Complex sentence: One commentator has attributed some of his behavior after his stroke to anosognosia, a neuropsychological presentation which leads an affected person to be unaware and unable to acknowledge disease in himself, and which often results in defects in reasoning, decision making, emotions, and feeling.
Split into simpler sentences: One commentator has attempted to attribute his actions to the condition called anosognosia following his stroke, a neuropsychological presentation in which the affected person is unaware and unable to acknowledge disease in himself. It also often results in defects in reasoning, decision making, emotions, and feeling.