Talk by Prof. Vincenzo Romei

Event Date: 
Fri, 23/05/2014 - 12:00

CBC Seminars

Vincenzo Romei, from Centre for Bran Science in University of Essex, invited by Salavador Soto-Faraco (MRG Group)

Title: Novel methods in Neuromodulations

Abstract:

I will present recent findings employing two novel methodological approaches namely (i) “oscillatory entrainment” of off-peak frequencies via transcranial Alternating Current Stimulation (tACS) and (ii) “empowering brain connectivity” via cortico-cortical paired associative-pulse TMS (ccPAS).

Using the first methodological approach in the context of multisensory processing I will show how individual brain oscillations can account for the illusory phenomenon known as the “sound-induced double-flash illusion”. The maximal temporal interval between two briefly played sounds able to induce the perception of a second illusory flash positively correlates with the individual occipital alpha-peak frequency (IAF). Crucially, by using occipital tACS tuned at IAF vs. far from IAF (±2Hz) within the alpha-band I will provide direct evidence that IAF causally determines the temporal window that is critical for this illusion to occur. tACS-EEG data will provide the proof-of-principle that off-peak tACS shifts IAF towards the external imposed rhythm.  

In the second part of my talk I will show that we can enhance visual sensitivity for motion stimuli by means of ccPAS for V5-to-V1 but not V1-to-V5 pairings (controlling for directionality); for 20ms inter-stimulus delays but not simultaneously delivered TMS pulses (controlling for timing); for TMS pulses delivered in active but not in sham mode (controlling for unspecific TMS effects). In conclusion this new set of intervening protocols provides novel methodological insights into the way we can study brain functions with a particular focus on (i) brain oscillations and (ii) brain connectivity.

Papers:

 Romei_CurrBiology2012.pdfSilvanto_NatNeurosc2005.pdfShams_Nature.pdf

 

When: 

FridayMay 23rd, at 12:00

 

Where:

Campus de la Comunicacio UPF, C/ Roc Boronat, 132. MAP
Edifici 52 (Ed. Roc Boronat), room 52.S25

Universitat Pompeu Fabra.

How to get there:

Metro: Llacuna or Poblenou <L4>, Glories <L1>, Tram: Ca l’aranyó [T4]