2018
DOI: 10.1038/s41598-018-31515-1
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GABAergic and cholinergic modulation of repetition suppression in inferior temporal cortex

Abstract: Neurons in many brain areas of different species reduce their response when a stimulus is repeated. Such adaptation or repetition suppression is prevalent in inferior temporal (IT) cortex. The mechanisms underlying repetition suppression in IT are still poorly understood. Studies in rodents and in-vitro experiments suggest that acetylcholine and GABA can contribute to repetition suppression by interacting with fatigue-related or local adaptation mechanisms. Here, we examined the contribution of cholinergic and… Show more

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Cited by 8 publications
(4 citation statements)
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“…Alteration in the excitation/inhibition balance of neural connectivity has been proposed as a mechanism underlying many of the manifestations occurring in ASD and ADHD, including atypical repetition suppression [ 50 , 55 , 81 ]. Since repetition suppression partly reflects GABAergic inhibition of glutaminergic pyramidal cells in the interneuronal network [ 54 , 55 ], reduced inhibition in the somatosensory cortex could underlie the atypical repetition suppression documented in our study. Additional perceptual phenomena that have been linked to alteration in the excitation/inhibition balance include binocular rivalry, spatial suppression/gain control and orientation discrimination (for reviews see, [ 22 , 82 ]).…”
Section: Discussionmentioning
confidence: 84%
“…Alteration in the excitation/inhibition balance of neural connectivity has been proposed as a mechanism underlying many of the manifestations occurring in ASD and ADHD, including atypical repetition suppression [ 50 , 55 , 81 ]. Since repetition suppression partly reflects GABAergic inhibition of glutaminergic pyramidal cells in the interneuronal network [ 54 , 55 ], reduced inhibition in the somatosensory cortex could underlie the atypical repetition suppression documented in our study. Additional perceptual phenomena that have been linked to alteration in the excitation/inhibition balance include binocular rivalry, spatial suppression/gain control and orientation discrimination (for reviews see, [ 22 , 82 ]).…”
Section: Discussionmentioning
confidence: 84%
“…As a whole, such adaptation may reflect neuronal fatigue potentially due to firing rate adaptation, synaptic depression, or afferent control 35 . Indeed, recent reports suggest that the cellular mechanism responsible for repetition-related adaptation arises from afferent input (in particular, GABAergic) to adapted cells 36 .…”
Section: Discussionmentioning
confidence: 99%
“…Alternatively, recent work has provided support for the causal involvement of somatostatin-positive (SOM+) neurons in MMN modulation 54 . Inspired by reports of inhibitory interneuron involvement in lateral inhibition and regulation of surround suppression 56 , 57 , one mechanistic explanation could be that these SOM+ neurons facilitating SSA by inhibiting pyramidal neurons during the standard condition 36 . Indeed, evidence shows that the suppression of activity may arise from SOM+ interneurons regulation of pyramidal neurons, as reversible inactivation of SOM+ neurons impair differentiation of stimulus presentation frequency in population activity 12 .…”
Section: Discussionmentioning
confidence: 99%
“…RS was first described in the inferior temporal cortex (IT) of macaque [29][30][31][32][33][34][35][36][37][38][39] and was also found in the rat primary visual cortex [40]. Another study conducted in the IT of macaques also revealed a modulation of the RS by GABA A -mediated inhibition [41].…”
Section: In Animalsmentioning
confidence: 95%