'How many' and 'how much' dissociate in the parietal lobe.
We investigated whether two features that are fundamental for quantity processing, namely numerosity and continuous quantity - or 'how many' versus 'how much' - may dissociate in the parietal lobe. Fourteen mathematically-normal participants performed a well-established numerosity discrimination tas...
| Publicado en: | Cortex: A Journal Devoted to the Study of the Nervous System & Behavior Vol. 73; pp. 73 - 80 |
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| Autores principales: | , , , |
| Formato: | Journal Article |
| Publicado: |
Masson SPA
Dec 2015
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=113039768&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 113039768 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: Dec 2015 vid: 73 pid: 12473 pub: Masson SPA artinfo: ui: 113039768 113039768 NLM26386441 10.1016/j.cortex.2015.08.007 NLM26386441 113039768 ppf: 73 ppct: 7 formats: tig: atl: 'How many' and 'how much' dissociate in the parietal lobe. aug: au: Lecce, Francesca Walsh, Vincent Didino, Daniele Cappelletti, Marinella affil: UCL Institute of Cognitive Neuroscience, London, UK; Department of Neuropsychology, National Hospital for Neurology and Neurosurgery, London, UK sug: subj: Judgment Brain Mapping Problem Solving Dominance, Cerebral Physiology Parietal Lobe Physiology Female Physical Stimulation Methods Mathematics Methods Male Transcranial Magnetic Stimulation Methods Young Adult Adult Reaction Time Physiology Adult: 19-44 years Female Male ab: We investigated whether two features that are fundamental for quantity processing, namely numerosity and continuous quantity - or 'how many' versus 'how much' - may dissociate in the parietal lobe. Fourteen mathematically-normal participants performed a well-established numerosity discrimination task after receiving continuous theta burst transcranial magnetic stimulation (TBS) over the left or right intraparietal sulcus (IPS) or the Vertex. We performed a detailed analysis of accuracy (based on the Weber Fraction, wf), which distinguished between trials in which numerosity was anti-correlated or 'incongruent' to other continuous measures of quantity, and trials in which numerosity and other continuous features were 'congruent'. Congruent trials can be processed by integrating numerosity or continuous quantity features like cumulative area since they correlate. Instead incongruent trials can only be processed based on numerosity and requires inhibiting cumulative area or other continuous quantity features like dot size and would lead to incorrect judgment if these features are used as a proxy for numerosity. We found an increase of wf, i.e., weakened numerosity processing in incongruent but not congruent trials following left IPS-TBS, which suggests that numerosity processing was impaired while continuous quantity processing remained unchanged. Moreover, wf increased in congruent but not in incongruent trials following right IPS stimulation. We concluded that left and right parietal are respectively critical for numerosity discrimination, i.e., 'how many' or alternatively for response selection, and for integrating numerosity and continuous quantity features. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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