Mental status examination (MSE)

The Mental Status Examination is to psychiatry what the physical examination is to general medicine. It is a structured, cross-sectional clinical assessment that gathers and organises the signs observed during an interview with the patient. It precisely documents current psychological functioning and provides a comparative reference for measuring the effectiveness of treatment.

The practitioner methodically explores general appearance and psychomotor behaviour, including hygiene, posture, slowing or agitation; language and speech, including rate, coherence, excessive speech or mutism; mood and affect, including sadness, lability, blunting or euphoria; the course and content of thought, including flight of ideas, obsessions and delusions; sensory perceptions, including hallucinations; overall cognitive functions; and judgement and awareness of illness, or insight.

The MSE is crucial for identifying medical emergencies: acute manic episodes, psychotic decompensation with disorganised thinking, confusion of organic origin, or imminent suicide risk. It supports robust diagnostic hypotheses consistent with international classifications of mental disorders.

Within care, this examination provides an essential objective foundation for adjusting prescriptions and psychological interventions. Conducted with sensitivity and empathy, it scrupulously respects the patient's dignity while ensuring clinical safety.

The Mental Status Examination is repeated at each consultation to document clinical progress under treatment objectively. Findings are shared with the multidisciplinary team, including psychologists, nurses and social workers, to adjust the level of vigilance and ensure patient safety.