Published online by Cambridge University Press: 05 December 2011
Summary
In neurological conditions, the major sets of paradoxical cognitive phenomena generally take one of five forms: (1) enhanced cognitive performance of neurological patients vis-à-vis neurologically intact individuals (‘lesion facilitation’), and (2) alleviation or restoration to normal of a particular cognitive deficit following the occurrence of a second brain lesion (‘double-hit recovery’). (3) A third set of paradoxical cognitive phenomena represents what may be termed ‘hinder–help effects’, where a variable that produces facilitation or detriment of performance in healthy participants results in opposite effects in neurological patients. (4) A fourth form of paradox relates to anomalies in the usual relationship between the presence/size of a brain lesion and the degree of cognitive deficit (‘lesion–load paradox’). (5) A fifth paradox is where there may appear to be direct or indirect benefits for long-term neurological outcome as the result of specific cognitive deficits being present (‘paradoxical positive outcome’). Discussion of neurological conditions will mainly be concerned with the first two sets of paradoxical phenomena, although the remaining three sets will also be reviewed briefly. In psychiatric disorders, analogous paradoxical phenomena have mainly been found in instances of enhanced cognitive performance in conditions such as depression and schizophrenia vis-à-vis healthy control participants, and also in reports of ‘post-traumatic growth’ after a major psychiatric illness or negative life events.
Introduction
As outlined in Chapter 1, the study of brain–behaviour relationships from cases of cerebral pathology has traditionally been embedded in the lesion-deficit model.
To save this book to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.