Catatonia Mental illness 35 Schizophrenics 35 Diagnosis 29 Diagnostic and statistical manual of mental disorders 14 International statistical classification of diseases and related health problems 14 Mental health 14 Study and teaching 14 Echolalia 10 Schizophrenia 8 Classification 7 Nosology 7 Tic disorders 5 Alcoholism 3 Bibliography 3 Consciousness 3 Dementia 3 Dementia praecox 3 Distraction 3 Epilepsy 3 Explanation 3 Feeling 3 Hallucination 3 Hypnosis 3 Hysteria 3 Mental disorder 3 Neurosis 3 Observation 3 Paralysis 3 Phenomenon 3