02375nas a2200361   4500008004100000022001400041245008900055210006900144260001600213300000900229490000700238520131500245653001001560653001201570653001001582653001801592653002701610653000901637653001501646653001101661653001201672100002101684700002101705700001801726700002201744700002401766700002201790700002001812700001901832700002101851700001901872856012201891       2024                        eng d  a2045-232200aMotor imagery ability scores are related to cortical activation during gait imagery.0 aMotor imagery ability scores are related to cortical activation   c2024 Mar 03  a52070 v143 a<p>Motor imagery (MI) is the mental execution of actions without overt movements that depends on the ability to imagine. We explored whether this ability could be related to the cortical activity of the brain areas involved in the MI network. To this goal, brain activity was recorded using high-density electroencephalography in nineteen healthy adults while visually imagining walking on a straight path. We extracted Event-Related Desynchronizations (ERDs) in the θ, α, and β band, and we measured MI ability via (i) the Kinesthetic and Visual Imagery Questionnaire (KVIQ), (ii) the Vividness of Movement Imagery Questionnaire-2 (VMIQ), and (iii) the Imagery Ability (IA) score. We then used Pearson's and Spearman's coefficients to correlate MI ability scores and average ERD power (avgERD). Positive correlations were identified between VMIQ and avgERD of the middle cingulum in the β band and with avgERD of the left insula, right precentral area, and right middle occipital region in the θ band. Stronger activation of the MI network was related to better scores of MI ability evaluations, supporting the importance of testing MI ability during MI protocols. This result will help to understand MI mechanisms and develop personalized MI treatments for patients with neurological dysfunctions.</p>10aAdult10aAnimals10aBrain10aCell Membrane10aElectroencephalography10aGait10aGastropoda10aHumans10aWalking1 aPutzolu, Martina1 aSamogin, Jessica1 aBonassi, Gaia1 aCosentino, Carola1 aMezzarobba, Susanna1 aBotta, Alessandro1 aAvanzino, Laura1 aMantini, Dante1 aVato, Alessandro1 aPelosin, Elisa  uhttps://www.neurotechcenter.org/publications/2024/motor-imagery-ability-scores-are-related-cortical-activation-during01811nas a2200373   4500008004100000022001400041245008700055210006900142260001200211300001200223490000700235520078300242653001201025653002601037653001501063653001801078653002401096653002501120653002101145653002201166653001001188653002701198653002701225653001501252653001001267653002001277100001201297700001701309700001901326700001701345700001401362700001401376856004701390       1996                        eng d  a0006-349500aVortex shedding as a precursor of turbulent electrical activity in cardiac muscle.0 aVortex shedding as a precursor of turbulent electrical activity   c03/1996  a1105-110 v703 a<p><span style="font-family: arial, helvetica, clean, sans-serif; font-size: 13px; line-height: 17px;">In cardiac tissue, during partial blockade of the membrane sodium channels, or at high frequencies of excitation, inexcitable obstacles with sharp edges may destabilize the propagation of electrical excitation waves, causing the formation of self-sustained vortices and turbulent cardiac electrical activity. The formation of such vortices, which visually resembles vortex shedding in hydrodynamic turbulent flows, was observed in sheep epicardial tissue using voltage-sensitive dyes in combination with video-imaging techniques. Vortex shedding is a potential mechanism leading to the spontaneous initiation of uncontrolled high-frequency excitation of the heart.</span></p>10aAnimals10aBiophysical Phenomena10aBiophysics10aCell Membrane10aComputer Simulation10aElectric Stimulation10aElectrochemistry10aElectrophysiology10aHeart10aModels, Cardiovascular10aMyocardial Contraction10aMyocardium10aSheep10aSodium Channels1 aCabo, C1 aPertsov, A V1 aDavidenko, J M1 aBaxter, Bill1 aGray, R A1 aJalife, J  uhttp://www.ncbi.nlm.nih.gov/pubmed/8785270