Naslov
Neuromagnetic studies on emotional and inverted faces in oddball paradigm

Autori
Sušac, Ana ; Ilmoniemi, Risto J. ; Pihko, Elina ; Supek, Selma

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Program and Abstracts / 14th Conference of the International Society for Brain Electromagnetic Topography / - Santa Fe, 2003, 43-43

Skup
14th Conference of the International Society for Brain Electromagnetic Topography

Mjesto i datum
Santa Fe (NM), Sjedinjene Američke Države, 19.11.2003. - 23.11.2003

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
EEG; MEG; face processing; inversion effect

Sažetak
Faces are socially very important visual stimuli and the detection of a change in face identity or facial expression is an evolutionary very important skill. Non-target neutral face presented as a deviant in an oddball paradigm with happy face standard and face with glasses target deviant elicited negative shift around 280 ms in EEG (electroencephalography) an MEG (magnetoencephalography) recordings [1]. If the neutral face of another person was used as the standard the amplitude of the observed negativity was smaller and at a later latency. Face inversion is known to disrupt face processing. The aim of the present study was to investigate the effect of face inversion on mismatch activity [1]. Neurodinamic measurements were conducted at the BioMag laboratory using 306-channel Vectorview system in the parallel with a 60-channel EEG. MRI scans were available for all 8 young male subjects that participated in the study. The spatio-temporal localization of neuromagnetic sources of the observed effect was carried out with standard Neuromag software. Four experimental conditions were employed: 1) happy standard, neutral deviant ; 2) neutral standard, neutral deviant ; 3) inverted happy standard, inverted neutral deviant ; 4) inverted neutral standard, inverted neutral deviant. The task was silent counting of the face with glasses deviant in all conditions. Mismatch activity observed in condition 1 and 2 was attenuated or disappeared in condition 3 and 4. This paradigm provides means for studying inversion effect on recognition of facial identity and facial expression.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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