The mental status exam (MSE) is a framework for assessment that’s used widely in the field of psychiatry. Rather than being a one-time assessment, it is used on an ongoing basis to capture how a patient is doing on any given encounter (and I use the term patient to describe the role and not the person as a whole). This is what it covers.
Appearance, attitude, and behaviour
This isn’t supposed to be about passing judgment; instead, the purpose is to identify clues that could potentially give information about someone’s mental health.
Apparent vs stated (i.e. actual) age
When I’m depressed, I tend to appear older than my stated age. While it sounds odd, “stated age” is just the usual terminology and isn’t intended to imply that someone is lying about their age.
If someone is depressed or struggling with negative symptoms of schizophrenia their hygiene may be poor, while someone who’s manic may be wearing heavy makeup and revealing clothing. This is most useful when the clinician knows the patient’s baseline for comparison, or can refer back to MSEs documented in the past. Another factor is whether the person is dressed appropriately for the weather. For example, if someone is dressed for a polar expedition on the hottest day of the summer, that may be an indicator of a psychotic illness.
This is another area where it’s useful to be aware of the patient’s baseline as well as relevant cultural norms. When I’m very depressed, I make minimal eye contact.
Cooperation with interviewer
Someone may be “guarded” (reluctant to reveal information) due to paranoia, or rapport may be “tenuous” (weak) because the interviewer is a pompous jerk, and this can mean the information gathered through the interview isn’t necessarily reliable and therefore the assessment may not accurately capture the entire clinical picture.
There are a variety of ways in which mental illness can affect people’s physical activity. For example, mania may speed up people’s movements (psychomotor agitation), while depression may slow it down (psychomotor retardation). Catatonia refers to extreme disruptions in motor behaviour.
This includes rate, rhythm and volume. If someone is slow to give answers to basic questions they may be described as having “latency of response.” Someone who is manic may have “pressured speech,” which is rapid and difficult to interrupt.
Mood and affect
Mood is how the patient describes their emotional state, and affect is the emotional expression visible on the patient’s face.
Diminished affect may be described as restricted, blunted, or flat, with flat being the most extreme. Affect may also be referred to as incongruent if, for example, someone was laughing while speaking about a very sad topic.
Perceptual disturbances are a key area of the mental status exam for anyone who might potentially be experiencing psychosis.
Hallucinations are internal stimuli rather than external stimuli that come from the outside world. Auditory hallucinations are most common, but visual, tactile, olfactory smell), and gustatory (taste) hallucinations may also occur.
These are skewed perceptions of “real” stimuli from the external environment.
Thought form/thought process
This part of the mental status exam considers the “how” of a person’s thinking. Is it logical? Is it disorganized? Thought form isn’t assessed based on asking the patient specific questions, but rather is evaluated based on the entirety of the interview.
Circumstantiality is sort of like beating around the bush; there’s some meandering along the way, but eventually the point is reached. Tangentiality goes off in another direction without returning to the original point.
There can also be poverty of thought, which is along the lines of “the lights are on, but nobody’s home.”
This considers the “what” of a person’s thinking, and may include delusions, obsessions, or suicidal or homicidal ideation (commonly abbreviated as SI/HI).
Common types of delusions include grandiose, persecutory, and ideas of reference, which involves interpreting special messages toward oneself from the external environment, such as from tv or radio.
Cognition and sensorium
This includes things like orientation, concentration, and memory. Further formal testing may sometimes be required. A brief test like the Montreal Cognitive Assessment (MOCA) or Folstein Mini Mental State Exam (MMSE) includes basic questions like what day/month/year it is, spell “world” backwards, subtract by 7’s (“serial sevens”), remember 3 objects, and copy a geometric design.
Baseline intelligence (IQ) and education are relevant here; if someone with no formal education can’t subtract by 7’s that doesn’t necessarily indicate there’s a problem, but if an astrophysicist can’t do that task, it’s a pretty good indicator of impairment.
Insight and judgment
Insight refers to the patient’s level of awareness of the symptoms they’re experiencing and the impact those symptoms are having on their functioning. Lack of insight is referred to as anosognosia.
Insight tends to be poorer with some illnesses compared to others, and may fluctuate depending on the severity of the symptoms someone’s having at any particular time. Someone may have good insight into the symptoms they’re experiencing and still disagree with the clinician on the cause of those symptoms or what should be done about them.
Judgment refers to the extent to which a person’s judgment, particularly with regards to behaviour, is influenced by the symptoms they’re currently experiencing. An obvious example of poor judgment would be someone who was manic blowing a bunch of money at a casino.
So there you have it, the basic pieces of a mental status exam. You may also be interested in the glossary of psychiatric terms, which gives an overview of terms that are commonly used in assessing mental health/illness.
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