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The Right Dorsal Premotor Mosaic: Organization, Functions, and Connectivity
Jul 24, 2017Author:
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Title: The Right Dorsal Premotor Mosaic: Organization, Functions, and Connectivity

 Authors: Genon, S; Li, H; Fan, LZ; Muller, VI; Cieslik, EC; Hoffstaedter, F; Reid, AT; Langner, R; Grefkes, C; Fox, PT; Moebus, S; Caspers, S; Amunts, K; Jiang, TZ; Eickhoff, SB

 Author Full Names: Genon, Sarah; Li, Hai; Fan, Lingzhong; Mueller, Veronika I.; Cieslik, Edna C.; Hoffstaedter, Felix; Reid, Andrew T.; Langner, Robert; Grefkes, Christian; Fox, Peter T.; Moebus, Susanne; Caspers, Svenja; Amunts, Katrin; Jiang, Tianzi; Eickhoff, Simon B.

 Source: CEREBRAL CORTEX, 27 (3):2095-2110; 10.1093/cercor/bhw065 MAR 2017

 Language: English

 Abstract: The right dorsal premotor cortex (PMd) of humans has been reported to be involved in a broad range of motor and cognitive functions. We explored the basis of this behavioral heterogeneity by performing a connectivity-based parcellation using metaanalytic approach applied to PMd coactivations. We compared our connectivity-based parcellation results with parcellations obtained through resting-state functional connectivity and probabilistic diffusion tractography. Functional connectivity profiles and behavioral decoding of the resulting PMd subregions allowed characterizing their respective behavior profile. These procedures divided the right PMd into 5 distinct subregions that formed a cognitive-motor gradient along a rostro-caudal axis. In particular, we found 1) a rostral subregion functionally connected with prefrontal cortex, which likely supports high-level cognitive processes, such as working memory, 2) a central subregion showing a mixed behavioral profile and functional connectivity to parietal regions of the dorsal attention network, and 3) a caudal subregion closely integrated with the motor system. Additionally, we found 4) a dorsal subregion, preferentially related to handmovements and connected to both cognitive and motor regions, and 5) a ventral subregion, whose functional profile fits the concept of an eye movement-related field. In conclusion, right PMd may be considered as a functional mosaic formed by 5 subregions.

 ISSN: 1047-3211

 eISSN: 1460-2199

 IDS Number: EP8PF

 Unique ID: WOS:000397636600032

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