Mental Status Examination PDF

THE MENTAL STATUS EXAMINATION Robert M. House M.D. 1. What is the mental status examination? induced mania. The patient denied drug abuse. However, questioning his wife uncovered a history of substance abuse,...

THE MENTAL STATUS EXAMINATION Robert M. House M.D. 1. What is the mental status examination? induced mania. The patient denied drug abuse. However, questioning his wife uncovered a history of substance abuse, and laboratory evaluation revealed the presence of The mental status examination (MSE) is a component of all amphetamine metabolites. The correct diagnosis was medical exams and may be viewed as the psychological amphetamine-induced mood disorder. equivalent of the physical exam. It is especially important in neurologic and psychiatric evaluations. The purpose is to evaluate, quantitatively and qualitatively, a range of mental 3. What key factors should be considered along with the functions and behaviors at a specific point in time. The MSE MSE? provides important information for diagnosis and for assessment of the disorder’s course and response to To assess properly the patient’s mental status, it is important treatment. Observations noted throughout the interview to have some understanding of the patient’s social, cultural, become part of the MSE, which begins when the clinician and educational background. What may be abnormal for first meets the patient. Information is gathered about the someone with more intellectual ability may be normal for patient’s behaviors, thinking, and mood. someone with less intellectual ability. Patients for whom English is a second language may have difficulty At an appropriate point in the evaluation the formal MSE is understanding various components of the MSE, such as the undertaken to compile specific data about the patient’s proverbs. Age may be a factor. In general, patients over the cognitive functioning. Earlier informal observations about age of 60 years tend to do less well on the cognitive elements mental state are woven together with the results of specific of the MSE. Often this is related to less education rather than testing. For example, the interviewer will have considerable to aging alone. information about attention span, memory, and organization of thought from the process of the interview. Specific 4. What are the major components of the MSE? questions during the formal exam clarify more precisely the degree of attention or memory dysfunction. Components vary somewhat from author to author. However, most detailed MSEs include information about appearance, Case. motor activity, speech, affect, thought content, thought process, perception, intellect, and insight. A 55-year-old man presented with recent complaints of sadness and fear of being alone. He also expressed thoughts about death. As he presented his concerns, he rambled to unrelated topics and seemed to lose track of the interviewer’s questions. During the formal inquiry he was able to recall only 1 of 3 objects he was asked to memorize and made several mistakes in serial subtractions of 7 from 100. Specific questioning about suicidal wishes and actions revealed that he had overdosed with aspirin 1 month earlier and still experienced suicidal thoughts and wishes to die. The cognitive tests were compatible with mild dementia, and the differential diagnosis included major depression. Further work-up and treatment supported this diagnosis. Cognitive functioning improved with antidepressants. 2. Is the MSE a separate part of the patient evaluation? No. The MSE must be interpreted along with the presenting history, physical exam, and laboratory and radiologic studies. Separate interpretation makes you vulnerable to erroneous conclusions. Collateral information from families and friends is also invaluable to confirm or supply missing data. Case. A 27-year-old man presented to the psychiatric emergency department with somewhat grandiose behavior, pressured speech, irritability, and psychomotor agitation. The initial diagnostic impression was bipolar disorder, manic or drug- 2 Glasgow Coma Scale CATEGORY SCORE Major Components of the Mental Status Examination Eyes open (E) Appearance Age, sex, race, body build, posture, eye Spontaneously 4 contact, dress, grooming, manner, To speech 3 attentiveness to examiner, distinguishing features, prominent physical abnormalities, To pain 2 emotional facial expression, alertness None 1 Motor Retardation, agitation, abnormal movements, gait, catatonia Best motor response (M) Speech Rate, rhythm, volume, amount, Obeys command 5 articulation, spontaneity Localizes pain 4 Affect Stability, range, appropriateness, intensity, Flexion to pain 3 affect, mood Extension to pain 2 Thought Suicidal ideation, death wishes, homicidal content ideation, depressive cognitions, obsessions, None 1 ruminations, phobias, ideas of reference, paranoid ideation, magical ideation, Best verbal response (V) delusions, overvalued ideas Oriented 5 Thought Associations, coherence, logic, stream, Confused 4 process clang associations, perseveration, neologism, blocking, attention Inappropriate words 3 Perception Hallucinations, illusions, Incomprehensible sounds 2 depersonalization, derealization, déjà vu, jamais vu None 1 Intellect Global impression: average, above Summed coma scale = E + M + V average, below average Insight Awareness of illness 6. Are there short forms of the MSE? Adapted from Zimmerman M: Interviewing Guide for Evaluating DSM-IV Psychiatric Disorders and the Mental Status Examination. Philadelphia, Psychiatric Press Several shortened forms of the MSE have been developed as Products, 1994, pp 121–122. screening instruments. All are composed of a combination of measures to detect cognitive impairments more accurately. Although helpful, such exams must be combined with clinical history. The diagnosis of dementia and delirium also 5. What is the first step in the MSE? requires the demonstration of a decline in cognitive functioning from a higher baseline. All screening exams have difficulty in identifying patients with mild cognitive A determination of consciousness must be the first step in impairment and patients with focal neurologic lesions, such MSE. Basic brain function determines the patient’s ability to as subdural hematomas or meningiomas. The key point is relate to the surroundings and cooperate with the interviewer. that MSEs should not be used as the sole criteria for Disturbance of this basic function affects higher level mental diagnosing delirium or dementia. processes that make up the major portions of the exam. The Glasgow Coma Scale was developed by Teasdale and Jennett in 1974 to assess impaired consciousness. It is based on eye 7. What are some of the more common screening exams? opening and motor and verbal responses to stimuli. The scale ranges from 3 (deep coma) to 14 (full-alert wakefulness). The Mini-Mental State Examination (MMSE) is probably the best known. The MMSE tests orientation, immediate and short-term memory, concentration, arithmetic ability, language, and praxis. It takes about 10 minutes to administer. The Cognitive Capacity Screening Examination (CCSE) tests orientation, serial subtraction, memory, and similarities. It is less sensitive to delirium or dementia in the elderly. The Neurobehavioral Cognitive Status Examination (NCSE) is especially good for medically ill patients; it focuses on consciousness, orientation, attention, language, construction, memory, calculations, and reasoning. It tends to be more sensitive in detecting impairment because it is more detailed.  3 Memory can be assessed by asking about news events, Mini-Mental State Examination sports, television shows, or recent meals. MAXIMAL SCORE SCORE Long-term memory can be assessed by using past events confirmed by family members and also by repeating names Orientation of historical figures, such as presidents of the U.S. 5 ) ( What is the (year) (season) (date) (day) (month)? Language ability can be assessed by asking patients to explain similarities and differences between common objects 5 ) ( Where are we: (state) (country) (e.g., tree-bush, car-plane, air-water). (town) (hospital) (floor)? Registration Thinking processes can be assessed by asking patients to explain common proverbs with which they are familiar. 3 ) ( Name 3 objects: take 1 second to say each. Then ask patient to repeat them. Give 1 point for each correct 8. Can the MSE help to detect organic brain disease? answer. Attention and Calculation Emotional and behavioral change is frequently the first presentation of organic brain disease, especially in patients 5 ) ( Serials 7s from 100. 1 point for with frontal and temporal tumors, hydrocephalus, or cortical each correct answer. Stop after 5 atrophy. Brain tumors, subdural hematomas, small infarcts, answers. Alternatively, spell and cerebral atrophy may be undetected on routine “world” backward. neurologic exam, whereas the cognitive effects of such lesions may be apparent on mental status examination. For Recall patients with known brain lesions, a thorough MSE 3 ) ( Ask for the 3 objects named above. documents cognitive or emotional changes. 1 point for each correct answer. Language 9. Does a normal MSE or MMSE score mean competence? 9 ) ( Ask patient to name a pencil and watch. (2 points) No. Competence relates to patients’ ability to make Repeat the following: “No ifs, ands, reasonable decisions for themselves and others. Such or buts.” (2 points) decisions include ability to provide food and shelter, to manage money, and to participate in activities such as Follow a 3-stage command: “Take deciding a course of medical care. Patients who score well on a paper in your right hand, fold it in an MSE may have deficits in understanding or completing half, and put it on the table.” (3 common tasks of daily living. Among a population with a points) probable diagnosis of Alzheimer’s disease, 50% of patients Read and obey the following: scoring between 26 and 30 on the MMSE had difficulty with basic tasks such as coping with small sums of money or Close your eyes (1 point) finding their way around familiar streets. The MSE is only one component needed to assess competency. Medical Write a sentence (1 point) condition, current ability for self-care, and corroborating Copy a drawing of intersecting information from family or friends must be taken in pentagons (1 point) consideration. Adapted from Folstein MF, Folstein SE, McHugh PR: Mini- Mental State: A practical method for grading the cognitive states of patients for the clinician. J Psychiatr Res 12:189– 198, 1975. Additional questions can be used to extend and expand the components of a screening exam: Attention can be tested by counting by 2s to 20. This task is easier and can be used for patients with poor arithmetic skills. Calculation abilities can be tested by asking the patient to add simple combinations of two-digit numbers. The task can be graded in difficulty. Immediate recall can be assessed by asking patients to repeat number sequences up to seven forward and four in reverse order. Start with shorter sequences. 4 12. What are executive functions? Probability of Alzheimer’s Disease Among Patients with Specific Problems of Daily Living Complex cognitive abilities mediated primarily by the frontal MMSE RANGE (%) * lobes, dorsolateral prefrontal cortex, head of the caudate nucleus, and medial thalamus are referred to as executive SPECIFIC ABILITY 0–10 11–20 21–25 26–30 functions. Disorders in these areas can be assessed by evaluating the patient’s ability to self-regulate and plan. For Cope with small sums of 98 78 53 50 example, can the patient inhibit impulsive responses to a money stimulus and deliberate before acting? Failure to do so Perform household tasks 97 87 63 56 suggests a frontal lobe disorder. Perseveration of motor activity is another example of frontal lobe dysfunction: ask Recall recent events 97 92 89 91 the patient to perform an alternating task such as palm up– palm down, and later insert a third task (e.g., palm up–palm Remember short lists of 95 89 83 84 down–fist). The impaired patient may be able to repeat only items two components of the assigned task. Focal lesions or Find way around 92 72 59 53 degenerative disorders, such as Huntington’s chorea, that familiar streets affect these structures may lead to disorders of executive function. Recognize surroundings 82 44 30 19 Dress self 82 38 15 16 13. Is the MSE important to perform in patients who appear cognitively intact? Find way about indoors 68 40 20 16 Tendency to dwell in the 50 57 48 34 Yes. The exam can be abbreviated, but testing of cognitive past functions provides a useful baseline. Patients may deteriorate during follow-up. The initial exam provides a point for Feed self 44 05 02 06 comparison. Furthermore, mental status observations are a Bowel and bladder 41 14 17 12 key tool for psychiatrists. Honing observational skills continence through informal assessment and formal exams helps to alert the clinician to subtle aspects of affect, speech, and behavior, Adapted from Mungas D: In-office mental status testing: A especially as they change during the course of meetings. practical guide. Geriatrics 46:54–66, 1991, with permission. Subtle fluctuations are important sources of information * Values are percentages of probable Alzheimer’s disease throughout treatment. Learning to detect subtleties is a among patients with MMSE scores falling in each range and critical component of learning to become a skilled psychiatric difficulty performing the indicated activities. clinician. 10. Does an abnormal MSE or MMSE score mean incompetence? Not necessarily. Many patients with cognitive limitations develop alternative means of coping with their deficits that allows them to live fairly independent and satisfying lives. As with patients with a normal MSE or MMSE score, collateral history helps to determine whether the patient is able to provide for basic needs. 11. What are the major limitations of MSE screening questionnaires? Although structured, screening questionnaires are still subject to interpretive bias and depend on the skill and experience of the interviewer. All screening questionnaires have a fairly significant false-negative rate, especially in patients with focal lesions of the right hemisphere. Age (especially > 60 years), education (< 9th grade), cultural experience, and low socioeconomic standing limit the usefulness of MSE screening questionnaires. Unlike a detailed mental status exam, screening questionnaires are less to sensitive to subtle cognitive impairment.