The perception of dynamic visual stimuli relies on two apparently conflicting perceptual mechanisms: rapid visual input must sometimes be integrated into unitary percepts but at other times must be segregated or parsed into separate objects or events. Though they have opposite effects on our perceptual experience, the deployment of spatial attention benefits both operations. Little is known about the neural mechanisms underlying this impact of spatial attention on temporal perception. Here, we record magnetoencephalography (MEG) in male and female humans to demonstrate that the deployment of spatial attention for the purpose of segregating or integrating visual stimuli impacts prestimulus oscillatory activity in retinotopic visual brain areas where the attended location is represented. Alpha band oscillations contralateral to an attended location are therefore faster than ipsilateral oscillations when stimuli appearing at this location will need to be segregated, but slower in expectation of the need for integration, consistent with the idea that a frequency is linked to perceptual sampling rate. These results demonstrate a novel interaction between temporal visual processing and the allocation of attention in space.

Spatial attention tunes temporal processing in early visual cortex by speeding and slowing alpha oscillations / Sharp, Poppy; Gutteling, Tjerk; Melcher, David; Hickey, Clayton. - In: THE JOURNAL OF NEUROSCIENCE. - ISSN 0270-6474. - 42:41(2022), pp. 7824-7832. [10.1523/jneurosci.0509-22.2022]

Spatial attention tunes temporal processing in early visual cortex by speeding and slowing alpha oscillations

Sharp, Poppy;Melcher, David;Hickey, Clayton
2022-01-01

Abstract

The perception of dynamic visual stimuli relies on two apparently conflicting perceptual mechanisms: rapid visual input must sometimes be integrated into unitary percepts but at other times must be segregated or parsed into separate objects or events. Though they have opposite effects on our perceptual experience, the deployment of spatial attention benefits both operations. Little is known about the neural mechanisms underlying this impact of spatial attention on temporal perception. Here, we record magnetoencephalography (MEG) in male and female humans to demonstrate that the deployment of spatial attention for the purpose of segregating or integrating visual stimuli impacts prestimulus oscillatory activity in retinotopic visual brain areas where the attended location is represented. Alpha band oscillations contralateral to an attended location are therefore faster than ipsilateral oscillations when stimuli appearing at this location will need to be segregated, but slower in expectation of the need for integration, consistent with the idea that a frequency is linked to perceptual sampling rate. These results demonstrate a novel interaction between temporal visual processing and the allocation of attention in space.
2022
41
Sharp, Poppy; Gutteling, Tjerk; Melcher, David; Hickey, Clayton
Spatial attention tunes temporal processing in early visual cortex by speeding and slowing alpha oscillations / Sharp, Poppy; Gutteling, Tjerk; Melcher, David; Hickey, Clayton. - In: THE JOURNAL OF NEUROSCIENCE. - ISSN 0270-6474. - 42:41(2022), pp. 7824-7832. [10.1523/jneurosci.0509-22.2022]
File in questo prodotto:
File Dimensione Formato  
Research Articles, Behavioral/Cognitive Spatial Attention Tunes Temporal Processing in Early Visual Cortex by Speeding and Slowing Alpha Oscillations.pdf

Open Access dal 13/04/2023

Tipologia: Versione editoriale (Publisher’s layout)
Licenza: Creative commons
Dimensione 1.64 MB
Formato Adobe PDF
1.64 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: https://hdl.handle.net/11572/446650
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 17
  • ???jsp.display-item.citation.isi??? 17
  • OpenAlex ND
social impact