Abnormal behaviour after operation.

Hi, My mother had a operation where she had hysterectomy for fibroids .After that the biopsy report had grade 1 cancer in the endometrial cells.The oncologist suggested that for proper staging the ovaries and lymphnodes be removed.However,after the operation she has shown completely different behavioural symptoms like eating everything by stuffing altogether ,difficulty in understanding words ,talking difficulties and constant sounds from the mouth involuntarily.We had been consulting a psychiatrist since 1 yr but to no vain.They suggested an MRI scan ,focal gliosis and age related degenerative atropy was detected .Can you please suggest what can be the remedy for this abnormal behaviour or will it be permanent or any more complications of this ?