Ng the neural substrates of postural contagion suggests the participation of your mirror neuron technique plus the existence of higher order processes enrolled within the coding of stance (Slobounov et al ,).In the present study we investigate no matter if upright stance will be codified via the activation from the temporalparietal cortical network, classically enrolled inside the coding of biological motion (Blake and Shiffrar,).We hypothesize that the viewing a quiet stance postural sway, contrasted with its scrambled counterpart, would trigger electrophysiological events underpinning BM detection, corresponding to a adverse possible in the ms time window at temporalparietalFrontiers in Human Neuroscience www.frontiersin.orgMay Volume ArticleMartins et al.Observing PointLights Depicting Postural Adjustementsregions, as observed in early reports (Hirai et al Jokisch et al Krakowski et al Saunier et al).Furthermore, we conjectured that the viewing of PLD depicting high postural instability would also involve the frontoparietal networks ordinarily enrolled in action observation (Saygin et al).We address these hypotheses by comparing highdensity EEG dynamics yielded by the observation of PLD depicting quiet steady and unstable upright stance.stimulus (QB); unstable posture, biological stimulus (UB); nonbiological scrambled stimulus, corresponding for the quiet posture (QS); nonbiological scrambled stimulus, corresponding for the unstable posture (US).VolunteersA total of healthier male subjects have been evaluated.Thirteen volunteers (age range years) participated within the preliminary evaluation on the pointlight Hematoxylin COA videos built for this study, and volunteers (age range years) had been subjected for the EEG information collection.Each of the subjects had typical or corrected vision, and did not report any neurological, orthopedic or muscular pathology; the volunteers had been classified as righthanded, based on the Edinburgh lateral dominance scale (Oldfield,).The volunteers signed an informed consent, just after complete facts detailing the nature of the study along with the protocol to become performed had been provided to them.The regional ethical analysis committee authorized the present experimental protocol (procedure number .).Solutions StimuliFour pointlight display (PLD) animations, two “biological” and two “scrambled,” were made for this experiment.These PLD were constructed from the recording of two male actors, aged and years old, even though performing the following tasks maintenance on the upright stance on a steady surface (quiet posture); and upkeep of the upright stance on a balance board (unstable posture; dimensions with the board cm, with a height of cm).The tasks have been recorded for s using an optoelectronic system (Smart, BTS Bioengineering), with nine infrared cameras positioned in circle, with a sampling price of Hz.The actors have been positioned in the middle of the circle, .m from the cameras.Fifteen reflexive markers have been attached on distinct anatomical points on each subject head (vertex); upper limbs (acromion, lateral epicondyle of your humerus, radial styloid course of action); hip (anterior superior iliac spine) PubMed ID:http://www.ncbi.nlm.nih.gov/pubmed/21530745 and reduce limbs (lateral epicondyle on the femur, lateral malleolus and fifth metatarsal).Except for the head, the markers were positioned on each sides with the physique.Only the frontal PLD view was applied.The two postural conditions (quiet and unstable) had been executed twice by the two actors, producing a total of 4 PLD biological stimuli (two for each activity and actor).For.
