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Repetitive transcranial magnetic stimulation over the left posterior middle temporal gyrus reduces wrist velocity during emblematic hand gesture imitation
- Source :
- Brain Topography
- Publication Year :
- 2019
- Publisher :
- Springer Verlag, 2019.
-
Abstract
- Results from neuropsychological studies, and neuroimaging and behavioural experiments with healthy individuals, suggest that the imitation of meaningful and meaningless actions may be reliant on different processing routes. The left posterior middle temporal gyrus (pMTG) is one area that might be important for the recognition and imitation of meaningful actions. We studied the role of the left pMTG in imitation using repetitive transcranial magnetic stimulation (rTMS) and two-person motion-tracking. Participants imitated meaningless and emblematic meaningful hand and finger gestures performed by a confederate actor whilst both individuals were motion-tracked. rTMS was applied during action observation (before imitation) over the left pMTG or a vertex control site. Since meaningless action imitation has been previously associated with a greater wrist velocity and longer correction period at the end of the movement, we hypothesised that stimulation over the left pMTG would increase wrist velocity and extend the correction period of meaningful actions (i.e., due to interference with action recognition). We also hypothesised that imitator accuracy (actor-imitator correspondence) would be reduced following stimulation over the left pMTG. Contrary to our hypothesis, we found that stimulation over the pMTG, but not the vertex, during action observation reduced wrist velocity when participants later imitated meaningful, but not meaningless, hand gestures. These results provide causal evidence for a role of the left pMTG in the imitation of meaningful gestures, and may also be in keeping with proposals that left posterior temporal regions play a role in the production of postural components of gesture. Electronic supplementary material The online version of this article (10.1007/s10548-018-0684-1) contains supplementary material, which is available to authorized users.
- Subjects :
- Adult
Male
Kinematics
Movement
Middle temporal gyrus
medicine.medical_treatment
Clinical Neurology
Observation
Apraxia
Action recognition
050105 experimental psychology
Fingers
Young Adult
03 medical and health sciences
0302 clinical medicine
Neuroimaging
medicine
Humans
0501 psychology and cognitive sciences
Radiology, Nuclear Medicine and imaging
Imitation (music)
Dual-route
Original Paper
Semantic storage
Gestures
Radiological and Ultrasound Technology
05 social sciences
Neuropsychology
Wrist
medicine.disease
Imitative Behavior
Transcranial Magnetic Stimulation
Temporal Lobe
Biomechanical Phenomena
Transcranial magnetic stimulation
Action (philosophy)
Neurology
Radiology Nuclear Medicine and imaging
Female
Neurology (clinical)
Anatomy
Psychology
Two-person
030217 neurology & neurosurgery
Cognitive psychology
Gesture
Subjects
Details
- Language :
- English
- ISSN :
- 08960267 and 15736792
- Database :
- OpenAIRE
- Journal :
- Brain Topography
- Accession number :
- edsair.doi.dedup.....70383a5ee2acb496cc76ccb5e4769029