Abstract
MT. + and V6 are key motion areas of the dorsal visual stream in both macaque and human brains. In the present study, we combined electrophysiological and neuroimaging methods (including retinotopic brain mapping) to find the electrophysiological correlates of V6 and to define its temporal relationship with the activity observed in MT+. We also determined the spatio-temporal profile of the motion coherency effect on visual evoked potentials (VEPs), and localized its neural generators. We found that area V6 participates in the very early phase of the coherent motion processing and that its electroencephalographic activity is almost simultaneous with that of MT+. We also found a late second activity in V6 that we interpret as a re-entrant feedback from extrastriate visual areas (e.g. area V3A). Three main cortical sources were differently modulated by the motion coherence: while V6 and MT. + showed a preference for the coherent motion, area V3A preferred the random condition. The response timing of these cortical sources indicates that motion signals flow in parallel from the occipital pole to the medial and lateral motion areas V6 and MT+, suggesting the view of a differential functional role.
| Original language | English |
|---|---|
| Pages (from-to) | 89-100 |
| Number of pages | 12 |
| Journal | NeuroImage |
| Volume | 67 |
| DOIs | |
| Publication status | Published - Feb 5 2013 |
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Keywords
- Retinotopy
- Self motion
- Spatiotemporal brain mapping
- VEP/fMRI combination
- Visual areas
- Visual perception
ASJC Scopus subject areas
- Cognitive Neuroscience
- Neurology
Cite this
Parallel motion signals to the medial and lateral motion areas V6 and MT+. / Pitzalis, Sabrina; Bozzacchi, Chiara; Bultrini, Alessandro; Fattori, Patrizia; Galletti, Claudio; Di Russo, Francesco.
In: NeuroImage, Vol. 67, 05.02.2013, p. 89-100.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Parallel motion signals to the medial and lateral motion areas V6 and MT+
AU - Pitzalis, Sabrina
AU - Bozzacchi, Chiara
AU - Bultrini, Alessandro
AU - Fattori, Patrizia
AU - Galletti, Claudio
AU - Di Russo, Francesco
PY - 2013/2/5
Y1 - 2013/2/5
N2 - MT. + and V6 are key motion areas of the dorsal visual stream in both macaque and human brains. In the present study, we combined electrophysiological and neuroimaging methods (including retinotopic brain mapping) to find the electrophysiological correlates of V6 and to define its temporal relationship with the activity observed in MT+. We also determined the spatio-temporal profile of the motion coherency effect on visual evoked potentials (VEPs), and localized its neural generators. We found that area V6 participates in the very early phase of the coherent motion processing and that its electroencephalographic activity is almost simultaneous with that of MT+. We also found a late second activity in V6 that we interpret as a re-entrant feedback from extrastriate visual areas (e.g. area V3A). Three main cortical sources were differently modulated by the motion coherence: while V6 and MT. + showed a preference for the coherent motion, area V3A preferred the random condition. The response timing of these cortical sources indicates that motion signals flow in parallel from the occipital pole to the medial and lateral motion areas V6 and MT+, suggesting the view of a differential functional role.
AB - MT. + and V6 are key motion areas of the dorsal visual stream in both macaque and human brains. In the present study, we combined electrophysiological and neuroimaging methods (including retinotopic brain mapping) to find the electrophysiological correlates of V6 and to define its temporal relationship with the activity observed in MT+. We also determined the spatio-temporal profile of the motion coherency effect on visual evoked potentials (VEPs), and localized its neural generators. We found that area V6 participates in the very early phase of the coherent motion processing and that its electroencephalographic activity is almost simultaneous with that of MT+. We also found a late second activity in V6 that we interpret as a re-entrant feedback from extrastriate visual areas (e.g. area V3A). Three main cortical sources were differently modulated by the motion coherence: while V6 and MT. + showed a preference for the coherent motion, area V3A preferred the random condition. The response timing of these cortical sources indicates that motion signals flow in parallel from the occipital pole to the medial and lateral motion areas V6 and MT+, suggesting the view of a differential functional role.
KW - Retinotopy
KW - Self motion
KW - Spatiotemporal brain mapping
KW - VEP/fMRI combination
KW - Visual areas
KW - Visual perception
UR - http://www.scopus.com/inward/record.url?scp=84871005922&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84871005922&partnerID=8YFLogxK
U2 - 10.1016/j.neuroimage.2012.11.022
DO - 10.1016/j.neuroimage.2012.11.022
M3 - Article
C2 - 23186916
AN - SCOPUS:84871005922
VL - 67
SP - 89
EP - 100
JO - NeuroImage
JF - NeuroImage
SN - 1053-8119
ER -