Abstract:
:Inhibitory control plays an important role in goal-directed behavior. Although substantial inter-individual variability exists in the behavioral performance of response inhibition, the corresponding modulating neurochemical and neurophysiological mechanisms remain unclear. Thus, the present study aimed to explore the relationship between behavioral response inhibition, GABA+ concentrations and automatic sensory gating (SG) in the auditory cortices. We recruited 19 healthy adults to undergo magnetoencephalography, magnetic resonance spectroscopy (MRS), and behavioral experiments. A paired-stimulus paradigm was used to study SG of the auditory cortices, and an auditory-driven Go-Nogo task was used to evaluate the behavioral response inhibition. Resting GABA+ concentrations were measured in the bilateral superior temporal gyri by means of MRS. Neither GABA+ concentrations nor auditory SG showed significant hemispheric asymmetry. However, an enhanced SG (lower ratio) was found to correlate with improved behavioral inhibition. Moreover, a higher GABA+ concentration was strongly related to improved inhibitory control. These findings highlight the important role of automatic neurophysiological processes and inhibitory neurotransmitters in the prediction of the behavioral performance of inhibitory control.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Cheng CH,Niddam DM,Hsu SC,Liu CY,Tsai SYdoi
10.1007/s00221-017-5101-6subject
Has Abstractpub_date
2017-12-01 00:00:00pages
3833-3841issue
12eissn
0014-4819issn
1432-1106pii
10.1007/s00221-017-5101-6journal_volume
235pub_type
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