Widespread and Opponent fMRI Signals Represent Sound Location in Macaque Auditory Cortex.
Widespread and Opponent fMRI Signals Represent Sound Location in Macaque Auditory Cortex.
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DOI:
10.1016/j.neuron.2017.01.013
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发表时间:
2017-02-22
期刊:
影响因子:
16.2
通讯作者:
Rauschecker JP
中科院分区:
文献类型:
--
作者:
Ortiz-Rios M;Azevedo FAC;Kuśmierek P;Balla DZ;Munk MH;Keliris GA;Logothetis NK;Rauschecker JP
In primates, posterior auditory cortical areas are thought to be part of a dorsal auditory pathway that processes spatial information. But how posterior (and other) auditory areas represent acoustic space remains a matter of debate. Here we provide new evidence based on functional magnetic resonance imaging (fMRI) of the macaque indicating that space is predominantly represented by a distributed hemi-field code rather than by a local spatial topography. Hemifield tuning in cortical and subcortical regions emerges from an opponent hemispheric pattern of activation and deactivation that depends on the availability of interaural delay cues. Importantly, these opponent signals allow responses in posterior regions to segregate space similarly to a hemifield code representation. Taken together, our results reconcile seemingly contradictory views by showing that the representation of space follows closely a hemifield code and suggest that enhanced posterior-dorsal spatial specificity in primates might emerge from this form of coding.
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DOI:
10.1093/cercor/bhv269
发表时间:
2016-01
期刊:
Cerebral cortex (New York, N.Y. : 1991)
影响因子:
--
作者:
Derey K;Valente G;de Gelder B;Formisano E
通讯作者:
Formisano E
影响因子:
25
作者:
Logothetis, NK;Guggenberger, H;Pauls, J
通讯作者:
Pauls, J
影响因子:
16.2
作者:
Formisano, E;Kim, DS;Goebel, R
通讯作者:
Goebel, R
影响因子:
2.5
作者:
BRUGGE, JF;MERZENICH, MM
通讯作者:
MERZENICH, MM
影响因子:
5.7
作者:
Dale, AM;Fischl, B;Sereno, MI
通讯作者:
Sereno, MI