Personality changes UMLS:C0240735 human_phenotype This term refers to changes in personality that are perceived as being abnormal. It does not refer to the usual gradual personality changes that tend to accompany aging and certain life situations. HP:0000751 Personality changes Personality change SNOMEDCT_US:192073007 SNOMEDCT_US:102943000 An abnormal shift in patterns of thinking, acting, or feeling. Abnormal nervous system physiology