Neuropsychological "systems efficiency" and positron emission tomography
Positron emission tomography (PET) has dramatically improved our ability to examine the functioning of the living brain. PET studies of neural pathways of the major sensory modalities--auditory, visual, somatosensory--have confirmed many traditional neuropsychological concepts, such as cross-lateral...
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Veröffentlicht in: | The journal of neuropsychiatry and clinical neurosciences 1989, Vol.1 (3), p.269-282 |
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Sprache: | eng |
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Zusammenfassung: | Positron emission tomography (PET) has dramatically improved our ability
to examine the functioning of the living brain. PET studies of neural
pathways of the major sensory modalities--auditory, visual,
somatosensory--have confirmed many traditional neuropsychological concepts,
such as cross-lateral representation and regional functioning to particular
primary sensory cortical areas. Other PET studies have used radioisotopes
to examine relationships between radiopharmaceutical agents and
neurobehavioral functioning in both normal and neuropathological states. In
some areas, PET methodology requires further refinement. For example,
effort should be made to develop the technology to do multiple scans within
a short time frame; statistical procedures to examine relationships between
neuropsychological tasks and the activity or presence of
radiopharmaceutical agents in multiple sites; adequate controls for
experimental error; and activation paradigms controlling the nonspecific
effects of simple arousal. PET activation models of cognition suggest that
a "systems efficiency" approach to assessing neuropsychological test
performance involving both serial and parallel processing would be useful.
These developments will improve empirical methodology and our understanding
of brain- behavior relationships. |
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ISSN: | 0895-0172 1545-7222 |
DOI: | 10.1176/jnp.1.3.269 |