Josephine Gräfe
@josephinegraefe.bsky.social
M. Sc. Psychology student at the University of Greifswald
Very happy to share my first first-author paper! 🎉 A big thank you to my co-authors and everyone who contributed to this work.
Jakub Limanowski@jlimanowski.bsky.social · 7d ago😀New lab paper by @fannipeters.bsky.social, with a (somewhat) new angle on comparing perceptual sensitivity to visuomotor kinematic asynchronies a.k.a. visual feedback delays - vs mere positional mismatches: link.springer.com/article/10.3...
New lab preprint, in which we find "entrained" parietal oscillations, mid-frontal theta, and somatomotor beta scale with the amount of visuomotor conflict during continuous movement - with potentially different roles in control vs intersensory attention. www.biorxiv.org/content/10.6...
Oscillatory correlates of visuomotor control under varying amount of feedback delay
A weighted integration of visual and proprioceptive movement feedback is key for an adaptive body representation by the brain. Previous work has suggested a relationship between alpha and beta oscilla...
biorxiv.org
Wie wird am Institut für Psychologie geforscht? 🧠🔍 Kann das Gehirn eine Gummihand als die eigene wahrnehmen? 🤔 Findet es beim Tag der Wissenschaft @unigreifswald.bsky.social heraus! Wir zeigen Euch: 🧠 EEG 💻 Handmodelle in VR 🖐️ die Rubber-Hand-Illusion Kommt vorbei – wir freuen uns auf euch!
My first first-author paper has just been published. If you are interested in brain stimulation and / or visuo-proprioceptive conflict, check out the paper below. doi.org/10.1007/s110... A big thank you to my amazing co-authors and supervisors, especially @jlimanowski.bsky.social!
Occipital tACS does not modulate manual performance but fixation variability under visuo-proprioceptive conflict - Neurophysiology
The modulation of oscillations at alpha and beta frequency ranges recorded over sensory cortices has been linked to the top-down weighting of sensory information relative to (competing) information from other modalities. Here, using a virtual reality-based hand-target matching task under visuo-proprioceptive conflict, we tested whether alpha-/beta-tACS over the occipital cortex would improve action performance when conflicting visual movement feedback needed to be ignored in favor of proprioception. Participants had to match a target rhythm with either their unseen real hand (RH) grasping movements, or with the movements of a virtual hand (VH) that displayed their actual movements after a constant time delay. Visual movement feedback was, consequently, either task-relevant (VH task) or a distractor (RH task). In a cross-over, double-blind, within-subject design, we applied either low-intensity (2 mA peak-to-peak) transcranial alternating current stimulation (tACS) at 10 Hz (“alpha”) or 20 Hz (“beta”), or sham, over the occipital cortex during this task. Neither alpha- nor beta-tACS significantly affected hand-target matching performance, but fixation variability in the RH condition significantly decreased during beta-tACS relative to sham stimulation. Thus, despite not directly modulating manual performance, occipital beta-tACS could have facilitated ignoring the mismatching (distracting) visual movement feedback when needed.
doi.org
New lab paper spearheaded by @josephinegraefe.bsky.social - where we report no direct benefit of occipital alpha/beta tACS on visuomotor control during visual vs proprioceptive attentional sets, but an indirect one via gaze behavior: link.springer.com/article/10.1...
Occipital tACS does not modulate manual performance but fixation variability under visuo-proprioceptive conflict - Neurophysiology
The modulation of oscillations at alpha and beta frequency ranges recorded over sensory cortices has been linked to the top-down weighting of sensory information relative to (competing) information fr...
link.springer.com
Had a great time attending #PuG2026 this year and presenting my poster on visuo-proprioceptive conflict and brain stimulation!
