کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
921100 920751 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The truth-telling motor cortex: Response competition in M1 discloses deceptive behaviour
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب رفتاری
پیش نمایش صفحه اول مقاله
The truth-telling motor cortex: Response competition in M1 discloses deceptive behaviour
چکیده انگلیسی

Neural circuits associated with response conflict are active during deception. Here we use transcranial magnetic stimulation to examine for the first time whether competing responses in primary motor cortex can be used to detect lies. Participants used their little finger or thumb to respond either truthfully or deceitfully regarding facial familiarity. Motor-evoked-potentials (MEPs) from muscles associated with both digits tracked the development of each motor plan. When preparing to deceive, the MEP of the non-responding digit (i.e. the plan corresponding to the truth) exceeds the MEP of the responding digit (i.e. the lie), whereas a mirror-reversed pattern occurs when telling the truth. This give away response conflict interacts with the time of stimulation during a speeded reaction period. Lies can even activate digit-specific cortical representations when only verbal responses are made. Our findings support neurobiological models which blend cognitive decision-making with motor programming, and suggest a novel index for discriminating between honest and intentionally false facial recognition.


► Single-pulse TMS can be used to study intra-hemispheric response preparation.
► Response competition dynamics can differentiate between truth-telling and deceit.
► Lying involuntarily activates motor plans associated with the truth in M1.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biological Psychology - Volume 89, Issue 2, February 2012, Pages 495–502
نویسندگان
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