If you are stuck in a traffic jam, the more numerous the queuing cars are, the longer you expect to wait. Time and numerosity are stimulus dimensions often associated in the same percept and whose interaction can lead to misjudgements. At brain level it is unclear to which extent time and numerosity recruit same/different neural populations and how their perceptual integration leads to changes in these populations' responses. Here we used high-spatial-resolution functional magnetic resonance imaging with neural model-based analyses to investigate how the topographic representations of numerosity and time change when these dimensions are varied together on the same visual stimulus in a congruent (the more numerous the items, the longer the display time) or incongruent manner. Compared to baseline conditions, where only one dimension was changed at a time, the variation of both stimulus dimensions led to changes in neural population responses that became more sensitive either to the two features or to one of them. Magnitude integration led also to degradation of topographies and shifts in response preferences. These changes were more pronounced in the comparison between parietal and frontal maps. Our results while pointing to partially distinct representations of time and numerosity show a common neural response to magnitude integration
The more numerous the longer: how the integration between numerosity and time leads to a common neural response / Fortunato, Gianfranco; Togoli, Irene; Bueti, Domenica. - In: PROCEEDINGS - ROYAL SOCIETY. BIOLOGICAL SCIENCES. - ISSN 0962-8452. - 290:1998(2023), pp. 1-12. [10.1098/rspb.2023.0260]
The more numerous the longer: how the integration between numerosity and time leads to a common neural response
Fortunato, Gianfranco
Conceptualization
;Togoli, IreneConceptualization
;Bueti, Domenica
Conceptualization
2023-01-01
Abstract
If you are stuck in a traffic jam, the more numerous the queuing cars are, the longer you expect to wait. Time and numerosity are stimulus dimensions often associated in the same percept and whose interaction can lead to misjudgements. At brain level it is unclear to which extent time and numerosity recruit same/different neural populations and how their perceptual integration leads to changes in these populations' responses. Here we used high-spatial-resolution functional magnetic resonance imaging with neural model-based analyses to investigate how the topographic representations of numerosity and time change when these dimensions are varied together on the same visual stimulus in a congruent (the more numerous the items, the longer the display time) or incongruent manner. Compared to baseline conditions, where only one dimension was changed at a time, the variation of both stimulus dimensions led to changes in neural population responses that became more sensitive either to the two features or to one of them. Magnitude integration led also to degradation of topographies and shifts in response preferences. These changes were more pronounced in the comparison between parietal and frontal maps. Our results while pointing to partially distinct representations of time and numerosity show a common neural response to magnitude integrationFile | Dimensione | Formato | |
---|---|---|---|
rspb.2023.0260_compressed.pdf
accesso aperto
Descrizione: pdf editoriale
Tipologia:
Versione Editoriale (PDF)
Licenza:
Creative commons
Dimensione
828.16 kB
Formato
Adobe PDF
|
828.16 kB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.