The mental status examination
- Technique
A structured description of how a person looks, behaves, speaks, feels, thinks and perceives during the interview.
What it is
The mental status examination (MSE) is the psychiatric equivalent of the physical exam: a snapshot of the person's mental functioning at the moment of the interview. It describes what is seen and heard, component by component, without jumping to a diagnosis. It is recorded in every psychiatric assessment and repeated over time to follow change, for example in delirium, psychosis or depression.
Components of the mental status examination
| Component | What to note | Examples |
|---|---|---|
| Appearance | Grooming, clothing for the weather, weight, scars, signs of substance use, apparent age | Unkempt and underweight; fresh cuts on the forearms |
| Behaviour and attitude | Eye contact, cooperation, psychomotor activity, abnormal movements | Restless and pacing; slowed movements; guarded and evasive |
| Speech | Rate, volume, amount, fluency, articulation | Fast and hard to interrupt; soft and slow with long pauses |
| Mood | The emotion the person describes | «I feel empty»; «I have never felt better» |
| Affect | Observed emotion: range, intensity, stability and fit with the content | Flat; labile; smiling while describing a death |
| Thought process | Organisation and speed of thinking | Goal-directed; tangential; flight of ideas; loose associations |
| Thought content | Main themes, delusions, obsessions, phobias, suicidal or homicidal ideas | Believes neighbours are poisoning the water; daily thoughts of dying |
| Perception | Hallucinations, illusions, depersonalisation | Hears a voice commenting on actions; sees insects on the wall |
| Cognition | Consciousness, attention, orientation, memory, language, abstraction | Drowsy and inattentive; cannot recall three words after a few minutes |
| Insight | Awareness of illness and need for treatment | Denies any problem; accepts being ill but blames others |
| Judgement | Quality of decisions in real life and in hypothetical situations | Gave away savings to strangers; plans to drive while intoxicated |
Clinical notes
- The MSE describes and does not diagnose: write what was observed (for example «answers after long pauses») rather than labels alone.
- A patient with depression may speak slowly and softly, and one with mania rapidly and loudly; dysarthria or aphasia suggests a medical or neurological cause.
- Confusion and inattention that are sudden or fluctuating point to a medical cause such as delirium; command hallucinations or voices commenting on behaviour probably represent a psychiatric disorder.
- The cognitive part can be completed with a brief screening test such as the MMSE or MoCA, but screening questionnaires cannot take the place of the full MSE.
Test yourself
Think of the answer, then tap the question to see it.
What is the difference between mood and affect in the mental status exam?
Mood is the emotion the patient reports; affect is the emotion the examiner observes, described by range, intensity, stability and congruence.
What does abnormal thought content include?
Delusions (false, fixed beliefs), ideas of reference and obsessions; suicidal and homicidal ideas are always asked about.
Why is attention assessed before memory?
An inattentive patient, as in delirium, fails the other tests, so the results cannot be interpreted.
A patient accepts being ill but refuses all treatment because doctors are ‘part of the plot’. What does this say about insight?
Insight is partial: some awareness of illness, but no understanding of the need for treatment.
Elsewhere in DurgiPedia
- Mental status: orientation, attention and screening tests
- The neurological examination: order and screening exam
- Decision-making capacity (competence) and how to assess it
Connections
Educational content on behavior and the clinical relationship; not a diagnostic or treatment guide and no substitute for assessment by a health professional. If you or someone near you is at risk, seek help now from an emergency service or a mental-health helpline.
Sources: Initial Psychiatric Assessment (MSD Manual Professional Edition, 2024); How To Assess Mental Status (MSD Manual Professional Edition, 2025); Medical Assessment of the Patient With Psychiatric Symptoms (MSD Manual Professional Edition, 2024).
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Representative model, for educational purposes only.