A current intense discussion in numerical cognition concerns the relationship between the processing of numerosity and other non-numerical quantities. In particular, it is a matter of debate whether number and other quantities (e.g., size, length) are represented separately in the brain or whether they share a common generalized magnitude representation. We acquired high-resolution functional MRI data while adult subjects engaged in a magnitude comparison task involving either numerosity (i.e., which of the two sets has more elements?) or line length (i.e., which of the two lines is longer?). We compared the activation evoked by the two different types of quantity and observed a common recruitment of a vast portion of occipital and parietal cortices. Using MVPA, we demonstrated that some of the commonly activated regions represented the discrete and continuous quantities via a similar distance-dependent magnitude code. However, we found no effect of distance across the two quantity representations, failing to support the existence of a common, dimension invariant, generalized quantity code. Taken together, these findings indicate that although the processing of number and length is supported by partially overlapping neural resources, representations within these regions do not appear to be based on a common neural code.

Processing number and length in the parietal cortex: sharing resources, not a common code / Borghesani, Valentina; Dolores de Hevia, Maria; Viarouge, Arnaud; Pinheiro Chagas M S Moreira, Pedro; Eger, Evelyn; Piazza, Manuela. - In: CORTEX. - ISSN 0010-9452. - ELETTRONICO. - 2019:(2019), pp. 17-27. [10.1016/j.cortex.2018.07.017]

Processing number and length in the parietal cortex: sharing resources, not a common code

Borghesani, Valentina;Pinheiro Chagas M S Moreira, Pedro;Piazza, Manuela
2019

Abstract

A current intense discussion in numerical cognition concerns the relationship between the processing of numerosity and other non-numerical quantities. In particular, it is a matter of debate whether number and other quantities (e.g., size, length) are represented separately in the brain or whether they share a common generalized magnitude representation. We acquired high-resolution functional MRI data while adult subjects engaged in a magnitude comparison task involving either numerosity (i.e., which of the two sets has more elements?) or line length (i.e., which of the two lines is longer?). We compared the activation evoked by the two different types of quantity and observed a common recruitment of a vast portion of occipital and parietal cortices. Using MVPA, we demonstrated that some of the commonly activated regions represented the discrete and continuous quantities via a similar distance-dependent magnitude code. However, we found no effect of distance across the two quantity representations, failing to support the existence of a common, dimension invariant, generalized quantity code. Taken together, these findings indicate that although the processing of number and length is supported by partially overlapping neural resources, representations within these regions do not appear to be based on a common neural code.
Borghesani, Valentina; Dolores de Hevia, Maria; Viarouge, Arnaud; Pinheiro Chagas M S Moreira, Pedro; Eger, Evelyn; Piazza, Manuela
Processing number and length in the parietal cortex: sharing resources, not a common code / Borghesani, Valentina; Dolores de Hevia, Maria; Viarouge, Arnaud; Pinheiro Chagas M S Moreira, Pedro; Eger, Evelyn; Piazza, Manuela. - In: CORTEX. - ISSN 0010-9452. - ELETTRONICO. - 2019:(2019), pp. 17-27. [10.1016/j.cortex.2018.07.017]
File in questo prodotto:
File Dimensione Formato  
2019_Borghesani_Processing number and length in the parietal_Cortex2019.pdf

Solo gestori archivio

Tipologia: Post-print referato (Refereed author’s manuscript)
Licenza: Altra licenza (Other type of license)
Dimensione 1.12 MB
Formato Adobe PDF
1.12 MB Adobe PDF   Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/212622
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 19
  • ???jsp.display-item.citation.isi??? 17
social impact