Friedhelm Christoph Hummel

Concurrent TMS and Spinal Cord fMRI Reveal Intensity-Dependent Modulation of Spinal Circuits

This study uses TMS and spinal fMRI to show how spinal cord activity changes with TMS intensity, revealing intensity-dependent BOLD responses in specific spinal regions.

Individual connectome fingerprints reveal early stabilization and long-term circuit remodeling after stroke

This study tracks how brain connectivity patterns change after stroke, showing early stabilization of functional fingerprints and long-term circuit remodeling that predicts recovery outcomes.

Effects Of Extrinsic Reward Based Skill Learning On Motor Plasticity

This study investigates how extrinsic reward affects motor plasticity during skill learning, finding that reward reduces corticospinal output variability and correlates with individual reward sensitivity.

Non-invasive stimulation of the human striatum disrupts reinforcement learning of motor skills

This study uses tTIS to show that 80Hz striatal stimulation disrupts reinforcement learning of motor skills, while 20Hz does not, indicating a frequency-dependent effect on striatal function.

Effects of hippocampal noninvasive theta-burst stimulation on consolidation of associative memory in healthy older adults

This study examines if theta-burst patterned tTIS targeting the hippocampus improves associative memory consolidation in older adults, finding it enhances recollection time 24 hours post-stimulation.

Not only a matter of age: Machine learning-based characterization of the differential effect of brain stimulation on skill acquisition

This paper uses machine learning to predict how brain stimulation affects skill acquisition, finding that its benefits depend on an individual's learning efficiency rather than age.

Pathway and directional specificity of Hebbian plasticity induction in the cortical visual motion processing network

This study uses ccPAS to investigate directional specificity in visual motion processing, finding that Backward ccPAS enhances re-entrant MT-to-V1 signals, which correlates with improved motion discrimination.

Differential impact of brain network efficiency on post-stroke motor and attentional deficits

This study examines how brain network efficiency impacts post-stroke motor and attentional deficits, finding that attentional impairment is more sensitive to network disruption than motor impairment.

Noninvasive theta burst stimulation of the human striatum enhances striatal activity and motor skill learning

This study demonstrates that noninvasive theta burst stimulation of the human striatum increases striatal activity and improves motor skill learning, particularly in older adults.

Black-box testing in motor sequence learning

This study investigates how motor skill acquisition evolves with practice, identifying memory storage and execution optimization as key factors, and shows that noninvasive brain stimulation can improve motor learning in older adults.

Causal disconnectomics of motion perception: insights from TMS-induced BOLD responses

This study uses TMS-fMRI to investigate how localized brain perturbations affect network organization and behavior, finding distinct responses in early visual areas and the medio-temporal area.

Targeting the fronto-parietal network using multifocal personalized transcranial alternating current stimulation to enhance motor sequence learning in healthy older adults

This study shows that personalized theta tACS targeting the fronto-parietal network improves motor sequence learning in older adults with high working memory load.

Reward boosts reinforcement-based motor learning

This study shows reward enhances motor learning beyond reinforcement feedback by specifically strengthening reinforcement-related motor adjustments, with effects lasting beyond the training session.

Sensory capability and information integration independently predict cognitive status of healthy older adults

The paper finds that sensory capability and information integration independently predict cognitive status in healthy older adults, with tACS enhancing task performance more in older adults.

Bifocal tACS Enhances Visual Motion Discrimination by Modulating Phase Amplitude Coupling Between V1 and V5 Regions

This study shows that anti-phase tACS between V1 and V5 improves motion discrimination by altering phase-amplitude coupling in the alpha band.

Congruency effects can compensate for deficits of healthy older adults in crossmodal integration

This study shows older adults perform worse in crossmodal integration tasks but improve when stimuli are congruent, suggesting congruency effects could aid cognitive training.