MODEL RELEASED. Cracked head. Abstract image of a person holding their cracked head. This may depict a personality shattered by mental illness or a person suffering from a headache or migraine. Disorders affecting personality include multiple personality disorder, depression or schizophrenia. Headaches are caused by tension or stretching in the membranes around the brain (meninges) or in the blood vessels or muscles of the scalp. Migraines are severe headaches often also accompanied by visual disturbances and nausea.