Break it up into its constituent parts.
Comatose patient - Glasgow coma scale
This is where one should start if one is presented a patient where there is a problem with memory or confusion is suspected. Try if the patient is rousable with a GCS > 12. Remember that many misinterpret the dysphasic patient with the delirious patient. As you work your way through the MTS you will soon get an idea if the issue is language or cognition. Start with a few questions on the patient's name, age and date of birth, what time it is, day, month and year. A basic "abbreviated" MTS is fine generally. It may seem superfluous when clerking an 80-year-old in for heart failure but if they are confused several nights later one can compare to see if it is new or that was the admission baseline. Delirium is a bad prognostic indicator.
Mental Test Score
A more reproducible way is to use the MMSE
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Neurological Examination - Cognition
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