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Examples
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Instead, the close associations between behavioral changes that mirror the pattern of age-related cortical changes argue for a scenario where age-related alterations rather reflect a mix of plastic-adaptive changes in response to altered use and degenerational changes developing with age.
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The fact that, in recordings of the same individual animal, RFs that are only separated by a few millimeters may reveal either severalfold enlargement or only very mild changes argues against degenerational processes on a uniform and global scale as a cause of these changes.
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Because of this association, it appears conceivable that aspects of age-related changes reflect plastic reorganization as a consequence of altered use rather than degenerational processes developing during aging.
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Institute for Neuroinformatics, Department of Theoretical Biology, Neural Plasticity Lab, Ruhr-University Bochum, Bochum, Germany Getting older is associated with a decline of cognitive and sensorimotor abilities, but it remains elusive whether age-related changes are due to accumulating degenerational processes, rendering them largely irreversible, or whether they reflect plastic, adaptational and presumably compensatory changes.
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In case of global degenerational processes one would expect rather similar changes to occur in the fore - and the hindpaw representations, which are cortically only a millimeter apart.
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We therefore conclude that age-related alterations are composed of plastic-adaptive alterations in response to modified use and degenerational changes developing with age.
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The fact that RFs of the fore - and hindpaws do not co-vary in aged animals argues against degenerational processes on a global scale.
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