Monday, October 7, 2013

HOW TO CONDUCT A NEUROPSYCHOLOGICAL ASSESSMENT (EXAMPLE CASE STUDY)


Name: Susan Lancaster
Client Name: Ben
Age Range: Adulthood
My current patient is a 70 year old African American male named Ben. He stopped exercising, watching his diet, and has gained 25 pounds after retiring. He also wears glasses for nearsightedness and has had a recent stroke. During his hospital stay, a PET scan was given and the results confirmed that he had a unilateral stroke which involved the left hemisphere and temporal-parietal, including part of Broca’s area. When the stroke occurred he was also not rendered unconscious but did experience post-stroke amnesia. Although, his amnesia seems to be improving, his physician still referred him to my office for a neuropsychological examination during his stay in the hospital.
Upon greeting Ben, he shook with his left hand and seemed to be experiencing an issue with movement of his right hand and arm. When trying to communicate with me, he also exhibited slow and slurred speech along with difficulty in forming articulated sentences. Since, this occurred, I gave him a brief assessment by asking him to identify and name certain objects around the office. The results indicated that he was having difficulty with word finding and naming of these objects. Therefore, I further tested him by using the Mini-Mental Status Exam or MMSE. He acquired 24 points out of 30 due to having issues with counting and spelling backward, recalling words from memory, identifying the correct date and day of the week, and when trying to draw the two intersecting figures.
I than spoke to his wife and she stated that Ben may be experiencing issues with hearing loss, unclear thinking, memory, and coordination because he is bumping in to things on his right side. She also requested to have his intellectual abilities assessed. Therefore, since Ben suffered from a left side stroke, he may experience a reduction in some functions which are required to successfully perform certain tasks. Since, this is the case the overall purpose of this work will be to first identify some tests that may be used to measure Ben’s current level of sensory perception, cognitive speed, constructional ability, verbal and spatial memory, verbal fluency, intelligence, achievement, personality, possible malingering, and daily functioning. Upon completion, I will then provide my recommendations for rehabilitation and a prognosis of his expected recovery.
TESTING & ASSESSMENT
Repeatable Battery for Assessment of Neuropsychological Status (RBANS) – Since, Ben was previously tested with the MMSE and certain deficits were measured, the RBANS could also be used to measure Ben’s current level of Fluid Intelligence, Crystallized Intelligence, and Memory. If there are deficits within these areas of functioning, it could also indicate Dementia. One other major benefit of using a screener is that it can identify specific tests that may be best for Ben’s individual needs.  Therefore, only certain tests that are provided in this work would be needed. 
Halstead-Reitan Battery (HRB) This can be used to measure Ben’s visual, auditory, tactual input, verbal communication, spatial/sequential perception, analysis of information, formation of mental concepts, judgment, motor output, attention, concentration, and memory. The Halstead-Reitan is typically used to evaluate individuals with suspected brain damage and may also be a good way to acquire useful information which confirms that damage is due to a stroke, the location of that damage, and if it’s getting worse, getting better or staying the same. Therefore, one other major benefit of this test is that it can confirm which side of Ben’s body is affected by touch, sound, or visible movement. There are also eight tests that are included in this particular battery which are as follows:
1. Category Test – This test can be administered to study Ben’s current level of abstract reasoning by measuring functions that involve visual, auditory, tactual input, verbal communication, spatial and sequential perception, analysis of information, forming mental concepts, making judgment, motor output, attention, concentration, and memory. His score will be determined by the number of errors and specific cutoff values for age and education level.
2. Tactile Performance Test / Seguin-Goddard Formboard – This is a form board based test that could be used to evaluate Ben’s current level of sensory ability, motor functions, memory for shapes and spatial location, along with his brain's ability to transfer information between the right and left hemispheres. When using this test it can also confirm brain damage and which side of Ben’s brain it may have occurred on.
3. Speech Sounds Perception Test (SSPT) – This test involves 60 different nonsense syllables which are presented by a tape recording. One main thing that this could be used for is to measure Ben’s current level of focused attention. This could also provide information concerning the acuteness vs. chronicity of Ben’s specific brain damage.

4. Reitan-Indiana Aphasia Screening Test – Aphasia can be defined as a loss of ability to comprehend or use spoken or written language due to brain damage. The test involves a set of questions that most normally impaired individuals would be able to understand. The overall purpose of this test would be to measure any language-related difficulties, non-verbal tasks, and right/left confusion that Ben may be experiencing.

5. Reitan-Klove Sensory-Perceptual Examination – This test has auditory, tactile, and visual components. One specific component involves measuring the ability to specify which side of the body is affected by touch, sound, or visible movement. Therefore, it may confirm that Ben is unable to perceive stimulation on the right side of his body.

6. Rhythm Test / Seashore Rhythm Test – This is a nonverbal auditory perception test that could be used to measure Ben’s current level of attention and concentration when listening to patterns of sounds. This particular testing method is also extremely sensitive to brain dysfunction.
7. Trail Making Test / Trails A & B – This test can be administered to assess Ben’s current ability to hold several tasks in mind at the same time and overall level of cognitive speed. This is because it will measure Ben’s level of scanning and visuomotor tracking, cognitive flexibility and divided attention. The process would include two separate parts that are identified as A and B. Part A will require him to first draw lines that connect consecutively numbered circles on a work sheet and Part B will require him to connect the same number of these circles on a different worksheet, while alternating between the two sequences. He will also be advised to connect these circles as fast as he can without lifting his pencil from the worksheet. The scores will be based on his level of memory and the time that it takes to complete these tasks. The purpose of this test will be to determine if Ben’s level of working memory and cognitive speed have been affected.
8. Ancillary Test / WAIS-III – This is a revision to the WAIS-R and could be administered to study Ben’s current level of intelligence. Its main composite scores involve Verbal IQ, Performance IQ, Full Scale IQ Verbal Comprehension, Working Memory, Perceptual Organization, and Processing Speed.
Paced Auditory Serial Addition Test (PASAT) – This can also be used to assess Ben’s level of working memory, attention and cognitive speed but overall, it is very difficult. Therefore, I don’t believe that this is the best method for Ben because he may show invalid deficits, due to lack of comprehension for difficult tasks.
Tinkertoy TestThis can be used to measure Ben’s ability to complete planning, initiating, and structuring of behaviors. It is mostly used with patients that may have dysfunction due to neurodegenerative diseases and can also measure constructional ability. This is because it would be completed by asking Ben to construct whatever he wants with 50 Tinkertoys.
Rey Osterreith Complex Figure Test This test would be completed by asking Ben to copy a complicated line drawing from memory. When using this test, it can identify whether he may be experiencing deficits with constructional ability, visuospatial abilities, memory, planning, attention and working memory. If he did show signs of difficulty when trying to use these functions in a normal manner, then it may also indicate the presents of Dementia.
California Verbal Learning Test (CVLT)This could be used to assess Ben’s current level of verbal and spatial memory. It would be performed by first asking him to read a specific list aloud which contains sixteen common words, with each belonging to one of four categories. Once, this was completed I would then ask him to recall as many of these items as possible. I would then record this number and whether or not he was able to make adequate use of category information. One other major benefit of using this test is that if Ben was unable to make use of category information, then this may indicate Alzheimer’s Disease or if he made repetition errors, then this may indicate Parkinson's Disease.
Boston Naming Test  This could be used to measure the overall impact of Ben’s left-side stroke on his level of verbal fluency. It would be completed by asking him to identify a series of pictures that are included in 60 large ink drawings. One, major strength of this test is that it can measure Ben’s current level of visual-perceptual abilities and language production. However, one limitation is that it may measure varying results if used on patients from different cultures. 
FASThis can be used to measure Ben’s current level of verbal fluency. It would be completed by having him recall and produce words for letters F, A and S within 60 seconds. If he experienced lower word production, then this is an indication that he may have left frontal lesions. One, major strength is that it can be used to quickly determine whether Ben needs to be referred to a pathologist or speech therapist for further testing and treatment. However, one limitation is that it cannot differentiate between depressed patients and those with dementia.
Wechsler Adult Intelligence Scale IV (WAIS-IV) – I could use this to measure Ben’s overall level of intelligence. When using this test, I would acquire measurements via four index scores that represent major components, along with two broad scores. These are as follows:
1. Full Scale IQ (FSIQ) – This is a score that will identify Ben’s total performance of VCI, PRI, WMI, and PSI.
2. General Ability Index (GAI) – This is the score of six subtests which are included in the VCI and PRI. There are also 10 subtests within each of the four components and five supplemental subtests that can be measured, if needed. The four components are as follows:
Verbal Comprehension Index (VCI)
This will measure Ben’s level of verbal comprehension and includes: Similarities (subtest) - abstract verbal reasoning, Vocabulary (subtest) - learned, comprehension and verbal expression, Information (subtest) - general information that is acquired from culture, and Comprehension (supplemental) - abstract social conventions, rules and expressions.
Perceptual Reasoning Index (PRI)
This will measure Ben’s level of perceptual reasoning and includes: Block Design (subtest) - spatial perception, problem solving, and visual abstract processing, Matrix Reasoning (subtest) - spatial/inductive reasoning, nonverbal abstract problem solving, Visual Puzzles (subtest) - spatial reasoning only, Picture Completion (supplemental) - how quickly one perceives visual details, and Figure Weights (supplemental) - analogical/quantitative reasoning.
Working Memory Index (WMI)
This will measure Ben’s level of working memory and includes: Digit Span (subtest) - mental control, concentration and attention, Arithmetic (subtest) - concentration when manipulating mathematical problems, and Letter-Number Sequencing (supplemental) - attention, mental control and concentration.
Processing Speed Index (PSI)
This will measure Ben’s level of processing speed and includes: Symbol Search (subtest) - visual perception, visual analysis and scanning speed, Coding (subtest) - visual/motor coordination, motor/mental speed, visual working memory, and Cancellation (supplemental) - visual and perceptual speed.
Wide Range Achievement Test 4 (WRAT4) – This is designed to assess patients that are between 5 and 94 years of age and it measures functions that are needed for things like proper communication, effective learning, thinking, reading, spelling words, and doing mathematical calculations. Therefore, I could use this test in combination with previous records and current interviews from collaterals to measure Ben’s overall level of achievement.
Minnesota Multiphasic Personality Inventory (MMPI) – This is a paper and pencil inventory that can be used to assess Ben for possible psychological and psychiatric symptoms associated with his overall personality. However, the MMPI is not perfect so a revised version can also be used which is called the MMPI-2. This contains 567 test items and new scales were added to measure further traits that may be associated with abnormal behavior. This test also establishes a higher degree of overall construct validity because the revision process was carried out while addressing and establishing evidence of both convergent and discriminant validation. Furthermore, when using this test, the L Scale (L) could measure malingering which may occur if Ben exaggerates or lies about his current condition due to certain motivational factors.
Test of Memory Malingering (TOMM) This test could be used to measure unexpectedly poor performance, unexpectedly low effort and also identify malingering over true memory impairments. The test includes two learning trials along with one retention trial and can be administered by hand or via a computer. 
Wisconsin Card Sorting Test (WCST) This can be used to measure Ben’s executive functions and according to (Lezak, Howieson & Loring. 2004), these are needed for “volition, planning, purposeful action, and checking” (p. 611). The process will include a number of stimulus cards that are different in design, quantity and color which will be presented to him. I will then decide whether he needs to match the cards based on color, quantity or design. He will then be given additional cards and will need to match each to one of the stimulus cards, while making separate piles of cards for each one. During this process, he will not be told how the cards are supposed to be matched, but will be told if he is right or wrong. Throughout this test, the matching rules will also change and he will receive scores based on things like how long it takes him to learn the new matching rules and other errors. The overall purpose of this test would be to measure Ben’s current level of abstract thinking, concept reasoning and formation.
STROOP Test – This can be used to assess Ben’s working memory and attention along with performance of response inhibition, response conflict, and/or selective attention. Since, these additional functions can be measured the scores will also identify his overall level of concentration effectiveness.
Rivermead Behavioral Memory Test (RBMT-E) – This test could be used to measure Ben’s current level of memory when it comes to completing everyday activities, such as remembering things. Two examples of this could be to determine if he can remember an upcoming appointment or where keys are located. One major benefit of this method is that it can also be used to monitor any changes that may occur with his condition over time.
RECOMMENDATIONS
     Regardless, of which test method/s may be used, I believe that Ben will show some type of cognitive deficit within certain areas of cognition. This is because if he is currently exhibiting symptoms that may be associated with sensory perception, cognitive speed, constructional ability, verbal and spatial memory, verbal fluency, intelligence, achievement, personality, and/or daily functioning. In general, it can also be difficult to offer rehabilitation for patients that experience cognitive deficits after a stroke. However, in some cases, the patient may re-gain some or most of this lost ability when treated with a combination of medication and rehabilitation. Therefore, if assessment scores determine that Ben has deficits with certain functions, the following recommendations would be made: 
1. I would refer Ben for therapy that can teach him ways to compensate for existing memory problems and prescribe a medication that is used for Alzheimer’s to try and increase his level.
2. I would ask his wife to make modifications to his home environment so it is easier to maneuver the area without crashing into things.
3. I would refer Ben for therapy that can increase his level of functioning within several areas.
4. I would refer Ben to a hearing specialist to determine his level of current hearing ability.
5. I would refer Ben to a dietitian so he can learn how to eat better and lose weight.
6. I would also advise Ben to consider joining a local exercise program to address his weight.
7. I would refer him to a physical therapist to address the loss of ability with his right side.
PROGNOSIS
     If it is confirmed that Ben is suffering from cognitive deficits due to a left sided stroke, it is difficult to predict what his long-term condition might be. However, since he was never rendered unconsciousness and was able to verbally speak and follow commands after the stroke, he may have a much easier time gaining back some or even all of the cognitive abilities that have been lost. However, one major disadvantage is that Ben may not recover completely due to his age. This is because when brain damage occurs, it can be easier to heal and recovery when the patient is younger and in excellent health. Therefore, I am not confident that Ben will fully recovery from the effects of his stroke. Although, if he follows all recommendations on a regular basis, and has a good support system among family members, health professionals, and school staff, his condition may improve at a substantial level.
SUMMARY
    This paper addressed a 70 year old African American male named Ben. He had stopped exercising, watching his diet, and gained 25 pounds after retiring. He also wears glasses for nearsightedness and had a recent stroke. During his hospital stay, a PET scan confirmed that he had a unilateral stroke which involved the left hemisphere and temporal-parietal, including part of Broca’s area. When the stroke occurred he was also not rendered unconscious but did experience post-stroke amnesia. Although, his amnesia has improved, his physician still referred him to my office for a neuropsychological examination during his stay in the hospital.
When greeting Ben, he shook with his left hand and experienced an issue with movement of his right hand and arm. When trying to communicate, he also exhibited slow and slurred speech along with difficulty in forming articulated sentences. I then gave him a brief assessment by asking him to identify and name certain objects around the office and he had difficulty with word finding and naming of objects. Therefore, I further tested him with the Mini-Mental Status Exam or MMSE. He acquired 24 points out of 30 due to having issues with counting backward, spelling backwards, recalling words from memory, identifying the correct date and day of the week, and when trying to draw the two intersecting figures. His wife also stated that Ben may be experiencing issues with hearing loss, unclear thinking, memory, and coordination because he is bumping in to things on his right side so she wanted his intellectual abilities assessed.
Therefore, in order to determine if Ben is experiencing a reduction in functions which are required to successfully perform certain tasks, I first identified certain tests that may be used to measure his current level of sensory perception, cognitive speed, constructional ability, verbal and spatial memory, verbal fluency, intelligence, achievement, personality, possible malingering, and daily functioning. Upon completion, I also provided recommendations for rehabilitation and an overall prognosis for Ben’s expected recovery.
Reference:
Lezak, M., Howieson, D., & Loring, D. (2004). Neuropsychological Assessment (4th ed.).
Oxford: Oxford University Press.

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