TMS Laboratory
Laboratory manager:
Dr. Géza Gergely Ambrus
Team:

Charlotta Eick - PhD student

MSc students:
Antonia Eisele
Ricarda Budny
Lisa-Celine Süllwold

Alumni:

Maria Dotzer (MSc, 2016)
Anna B-C. Trimborn (BSc, 2017)
Fabienne Windel (BSc, 2017)
Laura Krohn (BSc, 2017)
Lisa Röhrig (Intern, 2017)

Prof. Dr. Gyula Kovács
Géza Gergely Ambrus, PhD
Catarina Amado, MSc
Charlotta Eick, MSc
Kathrin Wiese
 
Publications:
The temporal context of face perception

Predictive processes in the brain

vMMN mechanisms

Number processing in the brain

The hierarchy and parallelity of the visual face processing network

Body processing

The role of visual noise in perception 

BDNF and memory

Implicit learning in the brain
 
When Less is More: Enhanced Statistical Learning After Disruption of Bilateral DLPFC
Géza Gergely Ambrus, Karolina Janacsek, Anna B. C. Trimborn, Gyula Kovács, Dezső Németh
bioRxiv
2017
The aim of the present study was to directly test the causal role of the prefrontal cortex (PFC) in striatum-mediated implicit statistical learning and its consolidation using brain stimulation. Healthy young adults were trained on a probabilistic sequence learning task. 1 Hz transcranial magnetic stimulation (TMS) or sham stimulation of both the left and right dorsolateral PFCs (DLPFC) was applied intermittently during the learning session to disrupt frontal lobe functions.
In line with the predictions of a competitive relationship between DLPFC functions and statistical learning, the DLPFC stimulation group showed better performance compared to the sham group after the 24-hour consolidation period. This finding suggests that the disruption of DLPFC induced qualitative changes in picking up statistical regularities during learning that became salient in behavior after a stabilization period.
TMS Laboratory
Cooperations
The occipital face area is causally involved in the formation of identity specific face representations
Géza Gergely Ambrus, Maria Dotzer, Stefan R. Schweinberger, Gyula Kovács
Brain Structure and Function
in press, 2017
We combined a priming paradigm with TMS, using photographs of familiar and unfamiliar faces in a design that was aimed at assessing image-specific and image-independent representations in the rOFA. Our study is the first to demonstrate image-independent identity processing in the rOFA in healthy human participants. In addition, our study also demonstrates the potential of state-dependent brain stimulation techniques as an effective tool to gain a finer-grained understanding of cortical functions where more conventional virtual lesion techniques are insufficient.
Publications
Courses
Contact
Causal evidence of the involvement of the right occipital face area in face-identity acquisition
Géza Gergely Ambrus, Fabienne Windel, A. Mike Burton, Gyula Kovács
NeuroImage 
Volume 148, 1 March 2017, Pages 212–218
We have shown that disrupting the functions of the rOFA by TMS during a training phase abolishes identity information acquisition, thereby, for the first time we have demonstrated that the rOFA plays a causal role in the formation of image-independent representations for facial identities. These findings indicate that the rOFA is involved in identity learning from multiple instances and in the creation of identity-dependent memory traces. 
Causal evidence of the involvement of the number form area in the visual detection of numbers and letters
Mareike Grotheer, Géza Gergely Ambrus, Gyula Kovács
NeuroImage 
Volume 132, 15 May 2016, Pages 314-319
Double pulse TMS targeted at the right NFA significantly impaired the detection of briefly presented and masked Arabic numbers in comparison to vertex stimulation. This suggests the NFA to be necessary for fluent number processing. Surprisingly, TMS of the NFA also impaired the detection of Roman letters. On the other hand, stimulation of the lateral occipital complex (LO) had neither an effect on the detection of numbers nor on letters. Our results show forthe first time, that the NFA is causally involved in the early visual processing of numbers as well as of letters.