PsMe

Testing the role of predictability in stimulus specific adaptation to frequency-modulated sounds at the auditory subcortical pathway

Date
Jan 24, 2019
Time
5:00 PM - 6:00 PM
Speaker
Alejandro Tabas
Affiliation
TU Dresden
Series
TUD NIC Kolloquium
Language
en
Main Topic
Psychologie
Other Topics
Medizin, Psychologie
Description
Stimulus specific adaptation (SSA) is a ubiquitous phenomenon in the auditory pathway, whereby neurons adapt to frequently occurring stimuli but retain sensibility to novel sounds. Two competing neural mechanisms have been previously suggested to be responsible for SSA: habituation, assuming that different neural groups respond and adapt selectively to different stimuli; and predictive coding, that describes neural activity as prediction error and relates adaptation to predictability. In a previous study, we demonstrated that predictability modulates SSA to pure tones in the medial geniculate body (auditory thalamus) and the inferior colliculus (auditory midbrain), in agreement with the predictive coding hypothesis. In this study, we will apply the previous paradigm to dynamic frequency-modulated (FM) sounds. Despite their relevance to human and animal communication, stimulus-specific adaptation to this kind of sounds has not been studied before in mammals. Our aim is 1) to study if subcortical activity elicited by FM sounds shows adaptation to stimulus repetition; if so, 2) to elucidate is such adaptation is stimulus-specific; and, if so, 3) to determine if stimulus-specificity is also sensitive to predictability.
Links

Last modified: Jan 16, 2019, 12:00:26 PM

Location

TUD Falkenbrunnen (FAL 157, Chemnitzer Str. 46b)01187Dresden

Organizer

Neuroimaging CentreChemnitzer Str.46a01187Dresden
Phone
+49 351 463 42063
Fax
+49 351 463 42438
E-Mail
NIC
Homepage
http://www.nic-tud.de
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