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Hillus J, Moseley R, Roepke S, Mohr B. Action Semantic Deficits and Impaired Motor Skills in Autistic Adults Without Intellectual Impairment. Front Hum Neurosci 2019; 13:256. [PMID: 31404247 PMCID: PMC6669914 DOI: 10.3389/fnhum.2019.00256] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 07/09/2019] [Indexed: 11/23/2022] Open
Abstract
Several studies indicate the functional importance of the motor cortex for higher cognition, language and semantic processing, and place the neural substrate of these processes in sensorimotor action-perception circuits linking motor, sensory and perisylvian language regions. Interestingly, in individuals with autism spectrum disorder (ASD), semantic processing of action and emotion words seems to be impaired and is associated with hypoactivity of the motor cortex during semantic processing. In this study, the relationship between semantic processing, fine motor skills and clinical symptoms was investigated in 19 individuals with ASD and 22 typically-developing matched controls. Participants completed two semantic decision tasks involving words from different semantic categories, a test of alexithymia (the Toronto Alexithymia Scale), and a test of fine motor skills (the Purdue Pegboard Test). A significant Group × Word Category interaction in accuracy (p < 0.05) demonstrated impaired semantic processing for action words, but not object words in the autistic group. There was no significant group difference when processing abstract emotional words or abstract neutral words. Moreover, our study revealed deficits in fine motor skills as well as evidence for alexithymia in the ASD group, but not in neurotypical controls. However, these motor deficits did not correlate significantly with impairments in action-semantic processing. We interpret the data in terms of an underlying dysfunction of the action-perception system in ASD and its specific impact on semantic language processing.
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Affiliation(s)
- Josephina Hillus
- Department of Psychiatry and Psychotherapy, Charité Universitätsmedizin, Campus Benjamin Franklin, Berlin, Germany
| | - Rachel Moseley
- Department of Psychology, Bournemouth University, Poole, United Kingdom
| | - Stefan Roepke
- Department of Psychiatry and Psychotherapy, Charité Universitätsmedizin, Campus Benjamin Franklin, Berlin, Germany
| | - Bettina Mohr
- Department of Psychiatry and Psychotherapy, Charité Universitätsmedizin, Campus Benjamin Franklin, Berlin, Germany
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Zhao Q, Li H, Hu B, Li Y, Gillebert CR, Mantini D, Liu Q. Neural Correlates of Drug-Related Attentional Bias in Heroin Dependence. Front Hum Neurosci 2018; 11:646. [PMID: 29410620 PMCID: PMC5787086 DOI: 10.3389/fnhum.2017.00646] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Accepted: 12/18/2017] [Indexed: 01/29/2023] Open
Abstract
The attention of drug-dependent persons tends to be captured by stimuli associated with drug consumption. This involuntary cognitive process is considered as attentional bias (AB). AB has been hypothesized to have causal effects on drug abuse and drug relapse, but its underlying neural mechanisms are still unclear. This study investigated the neural basis of AB in abstinent heroin addicts (AHAs), combining event-related potential (ERP) analysis and source localization techniques. Electroencephalography data were collected in 21 abstinent heroin addicts and 24 age- and gender-matched healthy controls (HCs) during a dot-probe task. In the task, a pair of drug-related image and neutral image was presented randomly in left and right side of the cross fixation, followed by a dot probe replacing one of the images. Behaviorally, AHAs had shorter reaction times (RTs) for the congruent condition compared to the incongruent condition, whereas this was not the case in the HCs. This finding demonstrated the presence of AB towards drug cues in AHAs. Furthermore, the image-evoked ERPs in AHAs had significant shorter P1 latency compared to HCs, as well as larger N1, N2, and P2 amplitude, suggesting that drug-related stimuli might capture attention early and overall require more attentional resources in AHAs. The target-related P3 had significantly shorter latency and lower amplitude in the congruent than incongruent condition in AHAs compared to HCs. Moreover, source localization of ERP components revealed increased activity for AHAs as compared to HCs in the dorsal posterior cingulate cortex (dPCC), superior parietal lobule and inferior frontal gyrus (IFG) for image-elicited responses, and decreased activity in the occipital and the medial parietal lobes for target-elicited responses. Overall, the results of our study confirmed that AHAs may exhibit AB in drug-related contexts, and suggested that the bias might be related to an abnormal neural activity, both in early and late attention processing stages.
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Affiliation(s)
- Qinglin Zhao
- Ubiquitous Awareness and Intelligent Solutions Lab, Lanzhou University, Lanzhou, China
| | - Hongqian Li
- Ubiquitous Awareness and Intelligent Solutions Lab, Lanzhou University, Lanzhou, China
| | - Bin Hu
- Ubiquitous Awareness and Intelligent Solutions Lab, Lanzhou University, Lanzhou, China
| | - Yonghui Li
- Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, China
| | - Céline R. Gillebert
- Department of Experimental Psychology, University of Oxford, Oxford, United Kingdom
- Department of Brain and Cognition, KU Leuven, Leuven, Belgium
| | - Dante Mantini
- Department of Experimental Psychology, University of Oxford, Oxford, United Kingdom
- Research Centre for Motor Control and Neuroplasticity, KU Leuven, Leuven, Belgium
- Neural Control of Movement Lab, ETH Zurich, Zurich, Switzerland
| | - Quanying Liu
- Research Centre for Motor Control and Neuroplasticity, KU Leuven, Leuven, Belgium
- Neural Control of Movement Lab, ETH Zurich, Zurich, Switzerland
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Lobben M, Bochynska A. Grounding by Attention Simulation in Peripersonal Space: Pupils Dilate to Pinch Grip But Not Big Size Nominal Classifier. Cogn Sci 2017; 42:576-599. [PMID: 28766754 DOI: 10.1111/cogs.12524] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 06/12/2017] [Accepted: 06/23/2017] [Indexed: 11/30/2022]
Abstract
Grammatical categories represent implicit knowledge, and it is not known if such abstract linguistic knowledge can be continuously grounded in real-life experiences, nor is it known what types of mental states can be simulated. A former study showed that attention bias in peripersonal space (PPS) affects reaction times in grammatical congruency judgments of nominal classifiers, suggesting that simulated semantics may include reenactment of attention. In this study, we contrasted a Chinese nominal classifier used with nouns denoting pinch grip objects with a classifier for nouns with big object referents in a pupil dilation experiment. Twenty Chinese native speakers read grammatical and ungrammatical classifier-noun combinations and made grammaticality judgment while their pupillary responses were measured. It was found that their pupils dilated significantly more to the pinch grip classifier than to the big object classifier, indicating attention simulation in PPS. Pupil dilations were also significantly larger with congruent trials on the whole than in incongruent trials, but crucially, congruency and classifier semantics were independent of each other. No such effects were found in controls.
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Affiliation(s)
| | - Agata Bochynska
- Department of Language and Literature, Norwegian University of Science and Technology (NTNU)
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