2025 Volume 45 Issue 3 Pages 151-158
Background：The conditions under which feelings of hatred and self-injurious behavior toward a paralyzed limb develop and change over time in Misoplegia have not been thoroughly investigated. Method：A patient with right hemisphere damage was assessed four times a day for 30 days, starting from the fourth day after onset. The assessment consisted of questions regarding：1) feelings of disownership of the paralyzed limb, 2) feelings of the paralyzed limb belonging to someone else, and 3) feelings of hatred and self-injurious behavior toward the paralyzed limb. Results：The patient reported feeling hatred and inflicting self-harm when recognizing the paralyzed limb as their own. Conversely, the patient reported no self-injurious behavior when perceiving the paralyzed limb as their common-law wife. The courses of hatred and self-injurious behavior did not align with the progression of somatoparaphrenia symptoms, such as the sense of disownership or the feeling that the limb belonged to someone else. Discussion：The novelty of this study lies in its longitudinal examination of hemiplegic hatred symptoms using self-reported behavioral data. In this case, it was interpreted that feelings of hatred arose when the paralyzed limb was recognized as the self, and the relationship with the common-law wife, who was the object of misidentification, suppressed the self-injurious behavior. It is possible that feelings of hatred and self-injurious behavior are influenced by the patient's recognition of the paralyzed limb as self or other, as well as the object of misidentification.
