scholarly journals Involvement of the mirror neuron system and the mentalizing system during communicative gesture production: a meta-analysis

Author(s):  
Jie Yang

Background. Hand gestures play an important role in face-to-face communication. Although studies have shown that the mirror neuron system and the mentalizing system are involved in gesture comprehension, evidence of how the two systems are activated during gesture production is scattered and the conclusion is unclear. Methods. To address this issue, the current meta-analysis used activation likelihood estimation (ALE) method to quantitatively summarize the results of previous functional magnetic resonance imaging (fMRI) studies on communicative gesture production. Eight studies were selected based on several criteria (e.g., using fMRI technique, involving healthy adults, using gesture production tasks, conducting whole-brain analysis, and reporting activation foci in the MNI or Talairach space). ALE was conducted to calculate the overall brain effects for gesture production, and subsequently the brain effects for gesture execution, planning, and imitation. Results. The meta-analysis results showed that overall both systems (inferior parietal lobule and medial cortical structures) were involved in gesture production. Further analyses indicated that the mirror neuron system and the primary motor cortex were selectively involved in gesture execution, whereas the menalizing system and the premotor cortex were selectively involved in gesture planning. In gesture imitation, significant effects were found in both systems. Discussion. These results suggest that the mirror neuron system and the mentalizing system play different roles during gesture production. The former may be involved in the processes that require the mapping between observed actions and motor representations or the retrieval of motor representations; whereas the later may be involved when the production tasks require understanding others’ mental states.

2016 ◽  
Author(s):  
Jie Yang

Background. Hand gestures play an important role in face-to-face communication. Although studies have shown that the mirror neuron system and the mentalizing system are involved in gesture comprehension, evidence of how the two systems are activated during gesture production is scattered and the conclusion is unclear. Methods. To address this issue, the current meta-analysis used activation likelihood estimation (ALE) method to quantitatively summarize the results of previous functional magnetic resonance imaging (fMRI) studies on communicative gesture production. Eight studies were selected based on several criteria (e.g., using fMRI technique, involving healthy adults, using gesture production tasks, conducting whole-brain analysis, and reporting activation foci in the MNI or Talairach space). ALE was conducted to calculate the overall brain effects for gesture production, and subsequently the brain effects for gesture execution, planning, and imitation. Results. The meta-analysis results showed that overall both systems (inferior parietal lobule and medial cortical structures) were involved in gesture production. Further analyses indicated that the mirror neuron system and the primary motor cortex were selectively involved in gesture execution, whereas the menalizing system and the premotor cortex were selectively involved in gesture planning. In gesture imitation, significant effects were found in both systems. Discussion. These results suggest that the mirror neuron system and the mentalizing system play different roles during gesture production. The former may be involved in the processes that require the mapping between observed actions and motor representations or the retrieval of motor representations; whereas the later may be involved when the production tasks require understanding others’ mental states.


2011 ◽  
Vol 23 (1) ◽  
pp. 63-74 ◽  
Author(s):  
Robert P. Spunt ◽  
Ajay B. Satpute ◽  
Matthew D. Lieberman

Humans commonly understand the unobservable mental states of others by observing their actions. Embodied simulation theories suggest that this ability may be based in areas of the fronto-parietal mirror neuron system, yet neuroimaging studies that explicitly investigate the human ability to draw mental state inferences point to the involvement of a “mentalizing” system consisting of regions that do not overlap with the mirror neuron system. For the present study, we developed a novel action identification paradigm that allowed us to explicitly investigate the neural bases of mentalizing observed actions. Across repeated viewings of a set of ecologically valid video clips of ordinary human actions, we manipulated the extent to which participants identified the unobservable mental states of the actor (mentalizing) or the observable mechanics of their behavior (mechanizing). Although areas of the mirror neuron system did show an enhanced response during action identification, its activity was not significantly modulated by the extent to which the observers identified mental states. Instead, several regions of the mentalizing system, including dorsal and ventral aspects of medial pFC, posterior cingulate cortex, and temporal poles, were associated with mentalizing actions, whereas a single region in left lateral occipito-temporal cortex was associated with mechanizing actions. These data suggest that embodied simulation is insufficient to account for the sophisticated mentalizing that human beings are capable of while observing another and that a different system along the cortical midline and in anterior temporal cortex is involved in mentalizing an observed action.


2011 ◽  
Vol 26 (S2) ◽  
pp. 2113-2113 ◽  
Author(s):  
A.M. Borghi ◽  
F. Binkofski

The ability to understand intentions of actions performed by others is one of the prerequisites for social interaction. This ability has been attributed to our capacity to mentalize others’ behaviour, by simulating or predicting their mental states that would cause that behaviour and make it comprehensible. Brain imaging studies revealed the so called “mentalizng network” including the pSTS/TPJ, the temporal poles and the medial prefrontal cortex. This network gets constantly activated anytime we try to take the perspective of others or try to simulate their state of mind. On the other hand the discovery of mirror neurons has provided an additional explanation for understanding of the content of actions. The functional properties of these neurons point out that action understanding is primarily based on a mechanism that directly matches the sensory representation of perceived actions with one's own motor representation of the same actions. We provide evidence that both systems interact closely during the processing of intentionality of actions. Thus mentalizing is not the only form of intentional understanding and motor and intentional components of action are closely interwoven. Both systems play an important role in the pathophysiology of schizophrenia.


NeuroImage ◽  
2019 ◽  
Vol 202 ◽  
pp. 116102 ◽  
Author(s):  
Alexander Geiger ◽  
Gary Bente ◽  
Sebastian Lammers ◽  
Ralf Tepest ◽  
Daniel Roth ◽  
...  

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Melody M. Y. Chan ◽  
Yvonne M. Y. Han

Abstract Background Impaired imitation has been found to be an important factor contributing to social communication deficits in individuals with autism spectrum disorder (ASD). It has been hypothesized that the neural correlate of imitation, the mirror neuron system (MNS), is dysfunctional in ASD, resulting in imitation impairment as one of the key behavioral manifestations in ASD. Previous MNS studies produced inconsistent results, leaving the debate of whether “broken” mirror neurons in ASD are unresolved. Methods This meta-analysis aimed to explore the differences in MNS activation patterns between typically developing (TD) and ASD individuals when they observe biological motions with or without social-emotional components. Effect size signed differential mapping (ES-SDM) was adopted to synthesize the available fMRI data. Results ES-SDM analysis revealed hyperactivation in the right inferior frontal gyrus and left supplementary motor area in ASD during observation of biological motions. Subgroup analysis of experiments involving the observation of stimuli with or without emotional component revealed hyperactivation in the left inferior parietal lobule and left supplementary motor during action observation without emotional components, whereas hyperactivation of the right inferior frontal gyrus was found during action observation with emotional components in ASD. Subgroup analyses of age showed hyperactivation of the bilateral inferior frontal gyrus in ASD adolescents, while hyperactivation in the right inferior frontal gyrus was noted in ASD adults. Meta-regression within ASD individuals indicated that the right cerebellum crus I activation increased with age, while the left inferior temporal gyrus activation decreased with age. Limitations This meta-analysis is limited in its generalization of the findings to individuals with ASD by the restricted age range, heterogeneous study sample, and the large within-group variation in MNS activation patterns during object observation. Furthermore, we only included action observation studies which might limit the generalization of our results to the imitation deficits in ASD. In addition, the relatively small sample size for individual studies might also potentially overestimate the effect sizes. Conclusion The MNS is impaired in ASD. The abnormal activation patterns were found to be modulated by the nature of stimuli and age, which might explain the contradictory results from earlier studies on the “broken mirror neuron” debate.


Author(s):  
Soukayna Bekkali ◽  
George J. Youssef ◽  
Peter H. Donaldson ◽  
Natalia Albein-Urios ◽  
Christian Hyde ◽  
...  

2014 ◽  
Vol 369 (1644) ◽  
pp. 20130174 ◽  
Author(s):  
A. Kraskov ◽  
R. Philipp ◽  
S. Waldert ◽  
G. Vigneswaran ◽  
M. M. Quallo ◽  
...  

Here, we report the properties of neurons with mirror-like characteristics that were identified as pyramidal tract neurons (PTNs) and recorded in the ventral premotor cortex (area F5) and primary motor cortex (M1) of three macaque monkeys. We analysed the neurons’ discharge while the monkeys performed active grasp of either food or an object, and also while they observed an experimenter carrying out a similar range of grasps. A considerable proportion of tested PTNs showed clear mirror-like properties (52% F5 and 58% M1). Some PTNs exhibited ‘classical’ mirror neuron properties, increasing activity for both execution and observation, while others decreased their discharge during observation (‘suppression mirror-neurons’). These experiments not only demonstrate the existence of PTNs as mirror neurons in M1, but also reveal some interesting differences between M1 and F5 mirror PTNs. Although observation-related changes in the discharge of PTNs must reach the spinal cord and will include some direct projections to motoneurons supplying grasping muscles, there was no EMG activity in these muscles during action observation. We suggest that the mirror neuron system is involved in the withholding of unwanted movement during action observation. Mirror neurons are differentially recruited in the behaviour that switches rapidly between making your own movements and observing those of others.


2018 ◽  
Vol 72 (2) ◽  
pp. 322-334 ◽  
Author(s):  
Caroline Catmur ◽  
Cecilia Heyes

Imitation is important in the development of social and technological skills throughout the lifespan. Experiments investigating the acquisition and modulation of imitation (and of its proposed neural substrate, the mirror neuron system) have produced evidence that the capacity for imitation depends on associative learning in which connections are formed between sensory and motor representations of actions. However, evidence that the development of imitation depends on associative learning has been found only for non-goal-directed actions. One reason for the lack of research on goal-directed actions is that imitation of such actions is commonly confounded with the tendency to respond in a spatially compatible manner. However, since the most prominent account of mirror neuron function, and hence of imitation, suggests that these cells encode goal-directed actions, it is important to establish whether sensorimotor learning can also modulate imitation of goal-directed actions. Experiment 1 demonstrated that imitation of goal-directed grasping can be measured while controlling for spatial compatibility, and Experiment 2 showed that this imitation effect can be modulated by sensorimotor training. Together, these data support the hypothesis that the capacity for behavioural imitation and the properties of the mirror neuron system are constructed in the course of development through associative learning.


2020 ◽  
Author(s):  
Mei Yan Melody Chan ◽  
Yvonne M.Y. Han

Abstract Background Impaired imitation has been found to be an important factor contributing to social communication deficits in individuals with autism spectrum disorder (ASD). It has been hypothesized that the neural correlates of imitation, the mirror neuron system (MNS), are dysfunctional in ASD, resulting in imitation impairment as one of the key behavioral manifestations in ASD. Previous MNS studies produced inconsistent results, leaving the debate of whether mirror neurons are “broken” in ASD unresolved.Methods This meta-analysis aimed to explore the differences in MNS activation patterns between typically developing (TD) and ASD individuals when they observe/imitate biological motions with/without emotional components. Effect-size signed differential mapping (ES-SDM) was adopted to synthesize the available fMRI data. Results The MNS is dysfunctional in ASD; not only the brain regions containing mirror neurons were affected, the brain regions supporting MNS functioning were also impaired. Second, MNS dysfunction in ASD is modulated by task complexity; differential activation patterns during the presentation of “cold” and “hot” stimuli might be a result of atypical functional connectivity in ASD. Third, MNS dysfunction in ASD individuals is modulated by age. MNS regions were found to show delayed maturation; abnormal lateralization development in some of the brain regions also contributed to the atypical development of the MNS in ASD. Limitations We have attempted to include a comprehensive set of original data for this analysis. However, whole brain analysis data were not obtainable from some of the published papers, these studies could not be included as a result. Moreover, the results indicating the age effect on MNS in ASD could only be generalized to individuals aged 11-37, as MNS activation remains unstudied for populations beyond this age range. Also, the ES-SDM linear regression modelling might not be ideal to illustrate the associations between age and MNS activation; the meta-regression results should be treated with caution. Conclusion There is a “global” rather than a “local” network dysfunction, which may underlie the imitation impairments in individuals with ASD. Task complexity and age modulate the functioning of the MNS, which may explain the previous peculiar results contributing to the unresolved “broken mirror neuron” debate.


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