Naslov
Changes in the prevalence of EEG waves during performing psychomotor tasks of different complexity

Autori
Nikolić, Matilda ; Gregov, Ljiljana ; Proroković, Ana

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

Izvornik
Book of Abstracts - 4th Croatian Congress of Neuroscience / - , 2013, 63-64

Skup
4th Croatian Congress of Neuroscience

Mjesto i datum
Zagreb, Hrvatska, 20.09.2013. - 21.09.2013

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
EEG waves; psychomotor tasks; complexity

Sažetak
Reviewing previous studies that used EEG it can be said that the presence of alpha and theta waves are often used as an indicator of cognitive and memory performance in particular. With the increasing tasks difficulty prevalence of these two types of waves is changed in the opposite direction, i.e. alpha power decrease but theta power increase. Changes in the prevalence of beta rhythm while performing different tasks are also systematic because this kind of waves are sensitive to changes in alertness and focused attention. The aim of this study was to determine whether there will be a change in the presence of alpha, beta and theta waves with varying degrees of psychomotor tasks complexity. It also aims to assess whether the changes in the dynamics of the nervous system would be different for the two groups of subjects, with a higher and a lower basal level of nervous system functioning. A criterion for categorizing participants was the presence of alpha rhythm on the Pz electrode during rest time with eyes closed. The study included right-handed participants, with no neurological disorders, aged from 19 to 23 years. The participants were performing two types of tasks: Fitts tapping tasks (with 2, 4 and 6 bits index of difficulty) choice reaction time tasks (congruent and incongruent conditions). Neural activity was monitored 10 minutes before, and during the performance of the tasks. Analyzing of results was done on 30 participants (15 in each category) to emphasize the possible differences in the dynamics of participants with different basal functional level. It was found that the alpha rhythm was not sensitive to changes in the complexity of the tasks, as opposed to the theta rhythm whose spectral power increased while performing more complex tasks. Alpha unlike theta rhythm well discriminate two categories of participants, as was to be expected given that the alpha rhythm was taken as a criteria for categorization. Beta rhythm was inconsistent when it comes to distinguishing the two participants’ categories, as well when it comes to changes in complexity of the tasks.

Izvorni jezik
Engleski

Znanstvena područja
Psihologija

POVEZANOST RADA