Breaking down number syntax: spared comprehension of multi-digit numbers in a patient with impaired digit-to-word conversion.
Can the meaning of two-digit Arabic numbers be accessed independently of their verbal-phonological representations? To answer this question we explored the number processing of ZN, an aphasic patient with a syntactic deficit in digit-to-verbal transcoding, who could hardly read aloud two-digit numbe...
| Published in: | Cortex: A Journal Devoted to the Study of the Nervous System & Behavior Vol. 59; pp. 62 - 74 |
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| Main Authors: | , , |
| Format: | case study research Journal Article |
| Published: |
Masson SPA
2014 Oct
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| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=109881513&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 109881513 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 00109452 GMP jtl: Cortex: A Journal Devoted to the Study of the Nervous System & Behavior issn: 00109452 maglogo: N pubinfo: dt: 2014 Oct vid: 59 pid: 12473 pub: Masson SPA artinfo: ui: 109881513 109881513 NLM25133926 2012799953 10.1016/j.cortex.2014.07.005 NLM25133926 109881513 ppf: 62 ppct: 12 formats: tig: atl: Breaking down number syntax: spared comprehension of multi-digit numbers in a patient with impaired digit-to-word conversion. aug: au: Dotan, Dror Friedmann, Naama Dehaene, Stanislas sug: subj: Agraphia Physiopathology Aphasia Physiopathology Apraxia Physiopathology Readability Language Stroke Complications Aged Agraphia Etiology Agraphia Rehabilitation Aphasia Etiology Aphasia Rehabilitation Apraxia Etiology Apraxia Rehabilitation Human Male Mathematics Neuropsychological Tests Stroke Physiopathology Stroke Rehabilitation Aged: 65+ years Male ab: Can the meaning of two-digit Arabic numbers be accessed independently of their verbal-phonological representations? To answer this question we explored the number processing of ZN, an aphasic patient with a syntactic deficit in digit-to-verbal transcoding, who could hardly read aloud two-digit numbers, but could read them as single digits ("four, two"). Neuropsychological examination showed that ZN's deficit was neither in the digit input nor in the phonological output processes, as he could copy and repeat two-digit numbers. His deficit thus lied in a central process that converts digits to abstract number words and sends this information to phonological retrieval processes. Crucially, in spite of this deficit in number transcoding, ZN's two-digit comprehension was spared in several ways: (1) he could calculate two-digit additions; (2) he showed good performance in a two-digit comparison task, and a continuous distance effect; and (3) his performance in a task of mapping numbers to positions on an unmarked number line showed a logarithmic (nonlinear) factor, indicating that he represented two-digit Arabic numbers as holistic two-digit quantities. Thus, at least these aspects of number comprehension can be performed without converting the two-digit number from digits to verbal representation. pubtype: Academic Journal doctype: case study research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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