Abstract:
:Patients with left hemisphere lesions deep in parietal or parietal-occipital regions close to the lateral ventricles have been reported to have impaired performance on left ear speech stimuli in dichotic listening tests. This loss has been termed "paradoxical" because it presents at the ear ipsilateral to the lesion. Two patients with infiltrating tumors which involved the corpus callosum demonstrated that effect, but also demonstrated right ear extinction on a complex-pitch discrimination test that required right hemisphere processing. Since the side at which the impairment will be demonstrated depends upon the type of test used, the term "paradoxical extinction" does not clearly describe this phenomena. It is suggested that the so-called paradoxical loss is better referred to as callosal extinction.
journal_name
Neuropsychologiajournal_title
Neuropsychologiaauthors
Sidtis JJ,Sadler AE,Nass RDdoi
10.1016/0028-3932(89)90134-6subject
Has Abstractpub_date
1989-01-01 00:00:00pages
1415-20issue
11-12eissn
0028-3932issn
1873-3514journal_volume
27pub_type
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