PSYB65H3 Chapter Notes - Chapter 15: Prenatal Development, Errorless Learning, Visual Cortex

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Published on 15 Jun 2012
School
UTSC
Department
Psychology
Course
PSYB65H3
Professor
Chapter 15
- CT and MRI technology have not made clinical psychologists obsolete
- Still many conditions that are not detectable by neuroimaging like early Alzheimers.
The client
- Usually neuropsychologists call people they're assessing as clients
- Can be of any age
The neurologist
- Neurologist: special type of physician who diagnoses and treats disorders of the nervous system
- Disorders of CNS and PNS
- Consists of 2-4 years of premedical university training, 4 years med school with M.D. or D.P
degree and 3 years of specialty training.
- Neurologists looks at neurological structure throughout body.
- They diagnose and treat disorders or may recommend surgery, performed by neurosurgeon
Radiologist
- Made possible because of Wilhelm Conard Rontgen
- Xrays: could penetrate solid materials, including human tissue
- Rontgen was rewarded for his discovery with the first Nobel Prize in Physics in 1901
- Radiologists are rare.
- Not only xrays but radiological examination such as CT or MRIs are analyzed by radiologists who
writes a report detailing the findings
Clinical neuropsychologist
- The branch of neuropsychologist concerned with psychological assessment, management, and
rehabilitation of neurological disease and injury.
- Different from experimental neuropsychology which focuses on human behaviour arise from
brain activity
- Cognitive neuropsychology less focused on neural basis and more focused on explaining
behaviour in terms of functional brain units regardless of anatomical representation
- Usually don't have medical training and typically complete an undergraduate degree in
psychology, a master's and doctorate ph.D or Psy.D typically complete an internship as well
- Usually first person to assess someone is another professional like optometrist or physician
- Ideally after brain injury patient is prompted to see neurologist. Brain imagie is interpreted by
radiologist and undergoes behavioural testing from clinical neuropsychologists.
- There is a lot of variability in the process
Assessment
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- First assessment is usually series of questions and tests by a neurologist or emergency room
physician
- Examines reflexes, cranial nerve functioning, muscle tone, gross movements, and perceive
stimuli
- Neurological exam includes Mini Mental State Exam, or the Modified Mini Mental State Exam.
How well people can answer series question designed to briefly examine cognitive functions
such as language, orientation to location, attention, mental status
- People with dementing illness or nontraumatic neurological impairment may first seek help
from the family physician
Neuropsychological assessment
- Detailed examination of cognitive functions
- Consultation consists of personal interview and the performance of a series of tests
- Use standardized tests:
o Always administered same way and scored same way
- 2 general approaches
o Use of a fixed battery
o Or use of a flexible selection of tests
- Many prefer to mix these approaches
- First with general cognitive test, then more specific
- Together with medical history and neurologist's report, can result in diagnosis, intervention and
rehabilitation
- Common goal
o Neuropsychological assessments provide evidence of cognitive dysfunction
o Neuropsychological assessments provide a profile of cognitive function for individual at
specific time
o As we discovered in the previous chapters, many types of diseases can result in changes
in cognitive function
o Cognitive profile can provide help to determine reason for cognitive impairment
Fixed test batteries
- 5 batteries widely used
o Halstead-Reitan Battery (HRB)
developed in 1930s
to examine cognitive change following brain injury
5 core tests: includes category test, tactual performance test, rhythm test,
speech sounds perception test, finger tapping test.
Often a trail-making test, an aphasia screening test and grip strength test are
given
Doesn't test memory directly
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Distinguishes brain damage to non-brain damage. But can be difficult
discriminating those with psychiatric illness from brain damage
Not used often because ti takes long to administer and not useful for individuals
who have motor problems.
Strength is its recognition that accurate cognitive profiles rely on assessment of
many types of behaviour
o Luria-Nebraska Neuropsychological battery (LNNB)
Measures receptive and expressive speech, motor, rhythm, tactile, visuospatial,
writing, reading, arithmetic and intellectual performance
Discriminates braindamge from normal
But difficulty discriminating from psychiatric disorders
Not sensitive to discriminate among subtle neurological impairments
Can't identify laterality of lesions
o Wechsler Adult intelligence scale (WAIS-III)
One of the most widely used. Not designed as neuropsychological test but for
intelligence
2 subtests: verbal (VIQ) and performance (PIQ)
Combining PIQ and VIQ = full-scale intelligence quotient (FSIQ)
PIQ relies less on previously acquired information than VIQ. PIQ more sensitive
to age changes in cognition.
Problem in reliability, and validity. Idea of intelligence is flawed, culturally and
gender bias.
Excellent predictor of academic achievement however
o National adult reading test (NART)
Single word reading test. Read alout series of English words, mostly short and
irregular in spelling. Begins easier an ends harder
Vocabulary correlated with intelligence and the ability to correctly pronounce
irregular words suggests a familiarity with new word. Irregular words don't
follow rules of phonic therefore must know how to pronounce the words rather
sounding them out.
Good at predicting WAIS scores
Predicts VIQ better than PIQ
Can predict premorbid IQ (before brain injury)
Reliable and appears to be somewhat resistant to change in IQ as a result of
brain damage
o Wechsler memory scale (WMS-III)
Is a widely used test that provides insight into memory function
Memory not unitary cunction, includes logical memort, visual memory, and
verbal memory
9 tests: personal and current information, orientation, mental control, logical
memory, digit span, visual reproduction, visual paired associate learning, figural
memory, visual paired associates learning
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Document Summary

Ct and mri technology have not made clinical psychologists obsolete. Still many conditions that are not detectable by neuroimaging like early alzheimers. Usually neuropsychologists call people they"re assessing as clients. Neurologist: special type of physician who diagnoses and treats disorders of the nervous system. Consists of 2-4 years of premedical university training, 4 years med school with m. d. or d. p degree and 3 years of specialty training. Neurologists looks at neurological structure throughout body. They diagnose and treat disorders or may recommend surgery, performed by neurosurgeon. Xrays: could penetrate solid materials, including human tissue. Made possible because of wilhelm conard rontgen. Rontgen was rewarded for his discovery with the first nobel prize in physics in 1901. Not only xrays but radiological examination such as ct or mris are analyzed by radiologists who writes a report detailing the findings. The branch of neuropsychologist concerned with psychological assessment, management, and rehabilitation of neurological disease and injury.

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