Recognition of point-light biological motion: Mu rhythms and mirror neuron activity

Ulloa, Erlinda R.; Pineda, Jaime A.

doi:10.1016/j.bbr.2007.06.007

Cited by 212 publications

(192 citation statements)

References 67 publications

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“…However, expanding the results from previous studies on the properties of the human mirror system, the present study shows that even impoverished motion stimuli, such as shadow animations of biological motion can yield resonant motor responses in the observer's M1. Indirectly, these results relate to findings from a previous fMRI [15] and electro-encephalography study [17], showing increased activations in motor areas from the perception of point-light displays. Together with these data, the present findings strongly suggest that motor areas are recruited to retrieve biological motion information from sparse visual input, which in turn may contribute to the recognition of perceived actions.…”

supporting

confidence: 82%

Observing shadow motions: Resonant activity within the observer's motor system?

Alaerts

Aggelpoel

Swinnen

et al. 2009

Neuroscience Letters

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a b s t r a c tSeveral studies have demonstrated that the human motor cortex is activated by the mere observation of actions performed by others. In the present study, we explored whether the perception of 'impoverished motion stimuli', such as shadow animations, is sufficient to activate motor areas. To do so, transcranial magnetic stimulation (TMS) was applied over the hand area of the primary motor cortex (M1) while subjects observed shadow animations depicting finger motions. Data showed that resonant motor responses in M1 were only found when a biological effector was recognized from the observed shadow animation. Interestingly, M1 responses were similar for observing shadow or real motions. Therefore, the loss of 'pictorial' movement features in a shadow animation appeared to have no effect on motor resonance in M1. In summary, these findings suggest that the 'recognition' of biological motion from sparse visual input is both necessary and sufficient to recruit motor areas. This supports the hypothesis that the motor system is involved in recognizing the actions performed by others.

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supporting

confidence: 82%

Observing shadow motions: Resonant activity within the observer's motor system?

Alaerts

Aggelpoel

Swinnen

et al. 2009

Neuroscience Letters

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“…Mirror therapy provides the visual illusion of a functional paretic limb by using the mirror reflection of non-paretic limb movements observed by an exerciser, thereby improving the function of the paretic limb 5) . Such action observations trigger activation of brain areas and muscles engaging in actual performance of the observed activities 11,13) . In this study, activation of brain areas during mirror therapy was measured using mu rhythm waves, and changes in upper extremity functions in accordance with muscle activity were examined using MFT.…”

Section: Discussionmentioning

confidence: 99%

“…C3 and C4 are primary sensorimotor areas, and Cz is a supplementary motor area. These three areas directly engage in the process of planning and outputting exercise orders during actual motor function performance 11) . The sampling frequency of the data was 256 Hz, and the data were stored on a computer using a pass filter of 0.5 to 50 Hz and a 12-bit analog-to-digital converter.…”

Section: Methodsmentioning

confidence: 99%

Effects of Mirror Therapy on Subacute Stroke Patients’ Brain Waves and Upper Extremity Functions

Bae¹,

Jeong²,

Kim

2012

J Phys Ther Sci

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Abstract.[Purpose] The purpose of this study was to examine the effects of mirror therapy on subacute stroke patients' brain waves and upper extremity functions. [Subjects and Methods] Twenty patients who experienced the onset of stroke within six months prior to this study were randomly and equally assigned to a control group (n=10) and a mirror therapy group (n=10). In addition to the existing rehabilitation treatment, the control group received sham therapy and the mirror therapy group received mirror therapy for 30 minutes each time, five times per week, for four weeks. Prior to and after the intervention, the changes in the subjects were measured using electroencephalography (EEG) and a manual function test (MFT).[Results] Mu rhythm suppression at C3, Cz, and C4 was significant in both groups after the intervention, with a more effective result in the mirror therapy group. Mu rhythm suppression was compared between the two groups after the intervention: it significantly differed between them at C3, Cz, and C4. According to the MFT results, manual functions improved significantly in both groups, with a better enhancement in the mirror therapy group. Each group also saw significant changes in its MFT results after the intervention. [Conclusion] Mirror therapy had an effect on mu rhythm suppression, improving brain activities and positively influencing motor function recovery. It is simple to apply, and patients can perform it independently. It is also cost-effective. Therefore, it is considered to be useful as part of a rehabilitation program for subacute stroke patients.

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“…This event related desynchronization or "mu suppression" (MS) is considered an operational measure of MNS function (Singh et al, 2011;Ulloa and Pineda, 2007). One experimental approach to interrogate MNS involves presenting subjects with point light animation videos (sparse visual representations of motion) that require filling in of context by the subject in order for the animated object to be perceived.…”

Section: Introductionmentioning

confidence: 99%

Effects of intranasal oxytocin on neural processing within a socially relevant neural circuit

Singh

Nunag

Muldoon

et al. 2016

European Neuropsychopharmacology

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Dysregulation of the Mirror Neuron System (MNS) in schizophrenia (SCZ) may underlie the cognitive and behavioral manifestations of social dysfunction associated with that disorder. In healthy subjects intranasal (IN) oxytocin (OT) improves neural processing in the MNS and is associated with improved social cognition. OT's brain effects can be measured through its modulation of the MNS by suppressing EEG mu-band electrical activity (8-13 Hz) in response to motion perception. Although IN OT's effects on social cognition have been tested in SCZ, OT's impact on the MNS has not been evaluated to date. Therefore, we designed a study to investigate the effects of two different OT doses on biological motion-induced mu suppression in SCZ and healthy subjects. EEG recordings were taken after each subject received a single IN administration of placebo, OT-24IU and OT-48IU in randomized order in a double-blind crossover design. The results provide support for OT's regulation of the MNS in both healthy and SCZ subjects, with the optimal dose dependent on diagnostic group and sex of subject. A statistically significant response was seen in SCZ males only, indicating a heightened sensitivity to those effects, although sex hormone related effects cannot be ruled out. In general, OT appears to have positive effects on neural circuitry that supports social cognition and socially adaptive behaviors. Published by Elsevier B.V. E-mail address: fsingh@ucsd.edu (F. Singh). European Neuropsychopharmacology (]]]]) ], ]]]-]]]Please cite this article as: Singh, F., et al., Effects of intranasal oxytocin on neural processing within a socially relevant neural circuit. European Neuropsychopharmacology (2015), http://dx

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Recognition of point-light biological motion: Mu rhythms and mirror neuron activity

Cited by 212 publications

References 67 publications

Observing shadow motions: Resonant activity within the observer's motor system?

Observing shadow motions: Resonant activity within the observer's motor system?

Effects of Mirror Therapy on Subacute Stroke Patients’ Brain Waves and Upper Extremity Functions

Effects of intranasal oxytocin on neural processing within a socially relevant neural circuit

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