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Articles, Systems/Circuits

Cohesion and Joint Speech: Right Hemisphere Contributions to Synchronized Vocal Production

Kyle M. Jasmin, Carolyn McGettigan, Zarinah K. Agnew, Nadine Lavan, Oliver Josephs, Fred Cummins and Sophie K. Scott
Journal of Neuroscience 27 April 2016, 36 (17) 4669-4680; DOI: https://doi.org/10.1523/JNEUROSCI.4075-15.2016
Kyle M. Jasmin
1Institute of Cognitive Neuroscience, University College London, London WC1N 3AR, United Kingdom,
2Laboratory of Brain and Cognition, National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland 20492,
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Carolyn McGettigan
1Institute of Cognitive Neuroscience, University College London, London WC1N 3AR, United Kingdom,
3Department of Psychology, Royal Holloway, University of London, London TW20 0EX, United Kingdom,
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Zarinah K. Agnew
4Department of Otolaryngology, University of California–San Francisco, San Francisco, California 94143,
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Nadine Lavan
3Department of Psychology, Royal Holloway, University of London, London TW20 0EX, United Kingdom,
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Oliver Josephs
5Institute of Neurology, University College London, London WC1N 3BG, United Kingdom, and
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Fred Cummins
6School of Computer Science, University College Dublin, Dublin 4, Ireland
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Sophie K. Scott
1Institute of Cognitive Neuroscience, University College London, London WC1N 3AR, United Kingdom,
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Article Figures & Data

Figures

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  • Figure 1.
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    Figure 1.

    Cortical regions more active during synchronous speaking than solo speaking and listening. This conjunction analysis shows voxels more active during synchronous speaking (with both live and recorded voice) than either speaking alone or passive listening (Synch-Live + Synch-Rec > Speak ∩ Synch-Live + Synch-Rec > Listen. Activated regions include the anterior and posterior auditory processing streams and medial regions on the superior temporal plane. Colors represent voxel T values.

  • Figure 2.
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    Figure 2.

    Cortical regions more active during synchronous speaking than solo speaking and listening, shown for Synch-Live and Synch-Rec separately. This conjunction analysis shows voxels more active during synchronous speaking, displaying activation for Synch-Live and Synch-Rec separately. Voxels in red represent significant voxels (p < 0.005, cluster corrected) for Synch-Live. Blue voxels represent significant voxel for Synch-Rec. Purple voxels represent significance in both conjunctions. Activated regions were largely overlapping, although activity in right inferior frontal gyrus was only detected for the Synch-Live condition. A statistical test for differences between Synch-Live and Synch-Rec is reported in the next section.

  • Figure 3.
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    Figure 3.

    Parametric effect of closer synchrony. Pericentral regions showed increased activity on trials where synchrony between talkers was closer (p < 0.005, uncorrected).

  • Figure 4.
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    Figure 4.

    Regions that showed greater activity during synchrony with a live voice (Synch-Live) compared with a recorded voice (Synch-Rec). Several regions showed increased activity during live synchrony compared with recorded synchrony, including the right temporal pole, inferior frontal gyrus, supramarginal gyrus, and bilateral parahippocampal gyrus, extending into hippocampus and lingual gyrus (p < 0.005, cluster corrected).

  • Figure 5.
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    Figure 5.

    Release of auditory suppression during live synchronous speaking. Red voxels represent increased activity during speech that is produced synchronously with a live person (a–c) as defined by the conjunction of Synch-Live > Synch-Rec ∩ Synch-Live > Diff-Live. The profile of activity in this region (d) indicates that this activity reflects an absence of suppression that typically occurs during speech production. The conditions are colored to indicate significant differences: red bars are significantly greater than blue bars; bars of the same color did not differ significantly. Significance was set at a Bonferroni-corrected level of α = 0.005 for all 10 pairwise tests. Error bars indicate SEM.

  • Figure 6.
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    Figure 6.

    Effects related to synchronous speaking. Functional connectivity (measured with PPI) from RSTG/IPL and RIFG, as well as the parametric effect of closer synchrony, all converged in right somatosensory cortex. Both rendered images show the same activity, from two different angles. Left image is sectioned to show overlap of results in somatosensory cortex.

  • Figure 7.
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    Figure 7.

    Schematic diagram of brain areas recruited by synchronized speaking. Arrows indicate pairs of regions that showed increased correlated activity during two-way (Synch-Live) synchronous speaking compared with one-way (Synch-Rec) synchronous speaking. Increased accuracy was parametrically related to activity in postcentral gyrus bilaterally during live synchronous speaking. The right temporal pole showed release of speech-induced suppression during live synchronous speaking.

Tables

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    Table 1.

    Conjunction of Synch-Live + Synch-Rec > Speak ∩ Synch-Live + Synch-Rec > Listena

    VoxelsRegionxyzT (peak voxel)
    323STG−30−34135.03
    228STG42−28−54.70
    1IFG4415232.95
    • ↵aCoordinates in MNI space.

    • View popup
    Table 2.

    Conjunction of Synch-Rec > Speak ∩ Synch-Rec > Listena

    VoxelsRegionxyzT (peak voxel)
    317STG−63−31105.23
    169STG57−31164.36
    • ↵aCoordinates in MNI space.

    • View popup
    Table 3.

    Conjunction of Synch-Live > Speak ∩ Synch-Live > Listena

    VoxelsRegionxyzT (peak voxel)
    229STG42−28−55.5
    268STG−63−444.48
    31IFG (opercularis)481773.64
    • ↵aCoordinates in MNI space.

    • View popup
    Table 4.

    Parametric correlation of closer synchronya

    VoxelsRegionxyzT
    33Superior frontal gyrus24−13675.39
    23Postcentral gyrus24−43644.73
    36Posterior cingulate cortex12−52284.6
    12Rolandic operculum57−13194.41
    36Postcentral gyrus66−10404.33
    22Insula36−1194.24
    63Postcentral gyrus−54−16494.15
    22Precentral gyrus−27−16614.1
    10Rolandic operculum36−28253.93
    15Middle occipital gyrus−42−79343.87
    14Rolandic operculum−39−10163.81
    15Precuneus18−70283.77
    10Middle temporal gyrus−39−58223.54
    14Postcentral gyrus−33−37553.28
    10Putamen30−713.24
    • ↵aCoordinates in MNI space.

    • View popup
    Table 5.

    Contrast of Synch-Live > Synch-Reca

    VoxelsRegionxyzTZ
    76IFG4823135.374.05
    106Temporal pole3620−295.13.92
    84Parahippocampal/lingual gyrus−18−43−55.033.88
    78Parahippocampal gyrus18−34−54.463.58
    73Supramarginal/angular gyrus66−28313.793.18
    • ↵aCoordinates in MNI space.

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    Table 6.

    Synch-Live > Diff-Livea

    VoxelsRegionxyzTZ
    109Posterior cingulate/corpus callosum−3−311053.87
    100Temporal pole4817−234.863.8
    • ↵aCoordinates in MNI space.

    • View popup
    Table 7.

    Conjunction of (Synch-Live > Synch-Rec) ∩ (Synch-Live > Diff-Live)a

    VoxelsRegionxyzT
    59Temporal pole3920−254.24
    • ↵aCoordinates in MNI space.

    • View popup
    Table 8.

    Clusters with increased functional connectivity with rSTG during Synch-Live versus Synch-Reca

    VoxelsAnatomyxyzT
    309Postcentral gyrus33−28436.68
    • ↵aCoordinates in MNI space.

    • View popup
    Table 9.

    Clusters with increased functional connectivity with rIFG during Synch-Live versus Synch-Reca

    VoxelsRegionxyzT
    563Postcentral gyrus21−34557.35
    151Postcentral gyrus−39−31588.75
    • ↵aCoordinates in MNI space.

    • View popup
    Table 10.

    Clusters with increased functional connectivity with LSTG during Synch-Live versus Synch-Reca

    VoxelsAnatomyxyzT
    72White matter−2417376.27
    • ↵aCoordinates in MNI space.

    • View popup
    Table 11.

    PPI of right temporal pole: Synch-Live > Synch-Reca

    VoxelsRegionxyzT (peak voxel)
    44Frontal white matter2129254.58
    34IFG (opercularis)4517133.92
    27Middle frontal gyrus−3320524.10
    24Inferior occipital gyrus47−76−54.02
    23Insula48−744.00
    • ↵aCoordinates in MNI space. These regions showed increased functional connectivity with the right temporal pole during Synch-Live trials, compared with Synch-Rec trials. p < 0.005, uncorrected (20 voxel extent threshold).

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The Journal of Neuroscience: 36 (17)
Journal of Neuroscience
Vol. 36, Issue 17
27 Apr 2016
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Cohesion and Joint Speech: Right Hemisphere Contributions to Synchronized Vocal Production
Kyle M. Jasmin, Carolyn McGettigan, Zarinah K. Agnew, Nadine Lavan, Oliver Josephs, Fred Cummins, Sophie K. Scott
Journal of Neuroscience 27 April 2016, 36 (17) 4669-4680; DOI: 10.1523/JNEUROSCI.4075-15.2016

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Cohesion and Joint Speech: Right Hemisphere Contributions to Synchronized Vocal Production
Kyle M. Jasmin, Carolyn McGettigan, Zarinah K. Agnew, Nadine Lavan, Oliver Josephs, Fred Cummins, Sophie K. Scott
Journal of Neuroscience 27 April 2016, 36 (17) 4669-4680; DOI: 10.1523/JNEUROSCI.4075-15.2016
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Keywords

  • coordinated action
  • fMRI
  • joint speech
  • right hemisphere
  • social cohesion
  • speech control

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