Ipsilateral Reorganization of Language in Early-Onset Left XXXX .

@entity1 @entity410 @entity1315 @entity5547
Purpose. Decline in confrontation naming ability occurs in a subset of @entity1315 ( @entity1315 ) @entity1 following left (dominant) anterior temporal lobectomy (ATL). @entity1 with late age of onset of @entity410 are most vulnerable to such decline. In addition, object names typically acquired later in language development are the words most likely to be inaccessible after ATL. Early-onset left @entity1315 @entity1 may be at lower risk for post-ATL @entity5547 either because they have a limited preoperative lexicon that does not include most late-age-of-acquistion names or they undergo early ipsilateral language reorganization, which results in a lexicon similar to that of late-onset @entity1315 @entity1 but offers protection from post-ATL naming decline.Methods. Sixty-five left hemisphere speech dominant left @entity1315 @entity1 who had undergone ATL were assessed pre- and postoperatively on the Boston Naming Test (BNT).Results. The early- and late-onset groups performed similarly across three BNT age-of-acquisition categories at the preoperative assessment. Words acquired relatively later in life were most likely to become inaccessible postoperatively for both groups, but the early-onset @entity1 showed significantly less overall postoperative decline in naming ability compared with the late-onset group.Conclusions. The more stable pre- to postoperative naming performance exhibited by early-onset @entity1 cannot be attributed to lack of acquisition of the words shown to be most vulnerable to postoperative decline (i.e., late-age-of-acquisition words). Their object naming stability suggests that early-onset left @entity1315 @entity1 undergo intrahemispheric reorganization of language early in life that provides protective benefits.
