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Brain Connect. 2018 Feb;8(1):22-32. doi: 10.1089/brain.2017.0535. Epub 2018 Jan 22.

Resting-State Functional Connectivity of the Subthalamic Nucleus to Limbic, Associative, and Motor Networks.

Author information

1
1 A.A. Martinos Imaging Center, McGovern Institute for Brain Research, Massachusetts Institute of Technology , Cambridge, Massachusetts.
2
2 Alan and Lorraine Bressler Clinical and Research Program for Autism Spectrum Disorder, Massachusetts General Hospital , Boston, Massachusetts.
3
3 Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology , Cambridge, Massachusetts.
4
4 Cognitive Neuroscience Research Unit (URNC), Department of Psychiatry and Forensic Medicine, Universitat Autonoma de Barcelona , Barcelona, Spain .
5
5 Department of Radiology, A.A. Martinos Center for Biomedical Imaging , Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts.
6
6 Department of Psychology, Florida International University , Miami, Florida.
7
7 Division of Cognitive and Behavioral Neurology, Brigham and Women's Hospital, Harvard University , Boston, Massachusetts.

Abstract

The subthalamic nucleus (STN) is a small structure situated deep in the midbrain that exhibits wide-ranging functionality. In addition to its role in motor control, the STN is considered a hub for synchronizing aspects of emotion and cognition including attention, inhibitory control, motivation, and working memory. Evidence from neuroanatomical tracer studies suggests that the medial, ventromedial, and dorsolateral parts of the STN correspond to limbic, associative, and motor subdivisions, respectively. Although the extent of STN functional anatomical overlap remains unclear, blood oxygenation level dependent imaging of the STN may provide complementary information about the diverse functions of this structure. Methodological limitations in spatial and temporal resolutions, however, have prevented a comprehensive exploration of temporal correlations from the STN to the whole brain. In this study, we optimize spatial (2 mm isotropic) and temporal (TR = 1 s) resolutions to take full advantage of the time series signal-to-noise ratio capabilities of multichannel array coils and simultaneous multislice imaging. We interrogated STN seed-to-voxel resting-state functional MRI connectivity in a group of 30 healthy participants that included the whole brain at high-temporal and spatial resolutions. This analysis revealed STN functional connectivity to limbic, associative, and motor networks. Our findings contribute to the understanding of STN functional neuroanatomy in humans and are clinically relevant for ongoing research in deep brain stimulation.

KEYWORDS:

32 channel coil; deep brain stimulation; functional connectivity; resting-state networks; subthalamic nucleus

PMID:
29160088
DOI:
10.1089/brain.2017.0535

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