Evidence map›Paper›PMID 33967681›Full record

ArticleFrontiers in neuroscience2021

The Effects of Dynamic and Static Emotional Facial Expressions of Humans and Their Avatars on the EEG: An ERP and ERD/ERS Study.

Teresa Sollfrank, Oona Kohnen, Peter Hilfiker, Lorena C Kegel, Hennric Jokeit, Peter Brugger, Miriam L Loertscher, Anton Rey, Dieter Mersch, Joerg Sternagel and 2 more

Open access · goldAbstract read
In one paragraph

Article in Frontiers in neuroscience, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
2.8field-weighted citation impact, top 9% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

11 citing papers in PubMed, 37 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Oscillatory brain dynamics underlying affective face processing.Social cognitive and affective neuroscience · 2025
    Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

12 authors at 4 institutions in 1 country.

Teresa SollfrankSwiss Epilepsy Center, Zurich, Switzerland.
Oona KohnenSwiss Epilepsy Center, Zurich, Switzerland.
Peter HilfikerSwiss Epilepsy Center, Zurich, Switzerland.
Lorena C KegelSwiss Epilepsy Center, Zurich, Switzerland.
Hennric JokeitSwiss Epilepsy Center, Zurich, Switzerland.
Peter BruggerValens Rehabilitation Centre, Valens, Switzerland.
Miriam L LoertscherInstitute for the Performing Arts and Film, Zurich University of the Arts, Zurich, Switzerland.
Anton ReyInstitute for the Performing Arts and Film, Zurich University of the Arts, Zurich, Switzerland.
Dieter MerschInstitute for Critical Theory, Zurich University of the Arts, Zurich, Switzerland.
Joerg SternagelInstitute for Critical Theory, Zurich University of the Arts, Zurich, Switzerland.
Michel WeberInstitute for the Performing Arts and Film, Zurich University of the Arts, Zurich, Switzerland.
Thomas GrunwaldSwiss Epilepsy Center, Zurich, Switzerland.
Swiss Epilepsy Center · CHZurich University of the Arts · CHUniversity Hospital of Zurich · CHUniversity of Zurich · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

This study aimed to examine whether the cortical processing of emotional faces is modulated by the computerization of face stimuli ("avatars") in a group of 25 healthy participants. Subjects were passively viewing 128 static and dynamic facial expressions of female and male actors and their respective avatars in neutral or fearful conditions. Event-related potentials (ERPs), as well as alpha and theta event-related synchronization and desynchronization (ERD/ERS), were derived from the EEG that was recorded during the task. All ERP features, except for the very early N100, differed in their response to avatar and actor faces. Whereas the N170 showed differences only for the neutral avatar condition, later potentials (N300 and LPP) differed in both emotional conditions (neutral and fear) and the presented agents (actor and avatar). In addition, we found that the avatar faces elicited significantly stronger reactions than the actor face for theta and alpha oscillations. Especially theta EEG frequencies responded specifically to visual emotional stimulation and were revealed to be sensitive to the emotional content of the face, whereas alpha frequency was modulated by all the stimulus types. We can conclude that the computerized avatar faces affect both, ERP components and ERD/ERS and evoke neural effects that are different from the ones elicited by real faces. This was true, although the avatars were replicas of the human faces and contained similar characteristics in their expression.

Indexed as

alphaavatarEEGemotionERPfacetheta

Identifiers

PMID33967681
PMCPMC8100234
OpenAlexW3153403628

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.