I am a clinician-scientist in the Neuromodulation Section of the University Department of Neurology in Oldenburg (Prof. Dr med Wessel) and am currently undergoing specialist training in neurology. Clinically, I work, amongst other things, in the University Outpatient Clinic for Movement Disorders, where I look after patients with Parkinson’s disease in particular.

My research focuses on the development and investigation of non-invasive methods for the targeted modulation of neural networks. Particular emphasis is placed on transcranial electrical stimulation, and in particular on transcranial temporal interference stimulation (tTIS). This technique utilises superimposed high-frequency electrical fields with the aim of non-invasively influencing even deeper brain structures.

My current research centres on the application of tTIS in Parkinson’s disease. We are investigating whether targeted stimulation of different structures within the basal ganglia can influence both motor and non-motor symptoms. A key area of focus is the modulation of motor functions through stimulation of the putamen. In addition, we are investigating the influence on motivational and reward-related behaviour through stimulation of the nucleus accumbens.

A key component of this work is the computer-aided simulation of electric fields. Using individual MRI data, we model the distribution of electric fields in the brain, optimise stimulation parameters and investigate the extent to which the field strength achieved in a target region correlates with clinical or behavioural effects. In addition, we investigate the neurophysiological basis of non-invasive electrical neurostimulation and examine its influence on neuronal oscillations and brain functions in healthy participants.

This research is conducted in close international collaboration with the Department of Cognitive Neuroscience at the University of Groningen, led by Prof. Dr André Aleman, and the Department of General Psychology at the Carl von Ossietzky University of Oldenburg, led by Prof. Dr Christoph S. Herrmann. This approach integrates basic scientific, methodological and clinical-translational research questions.

Another key area of research focuses on memory impairments in neurological disorders. In particular, I am investigating ‘Accelerated Long-Term Forgetting’ (ALF), a phenomenon characterised by accelerated forgetting over extended periods despite initially largely unremarkable memory performance. We are investigating this phenomenon, amongst others, in patients with multiple sclerosis, in order to better understand its clinical relevance, underlying mechanisms and suitable diagnostic procedures.

Methodologically, I utilise non-invasive electrical neurostimulation, structural and functional MRI imaging, computer-aided modelling, neuropsychological testing, and quantitative analyses of motor and behavioural functions. The aim of my work is to gain a better understanding of neurophysiological mechanisms and, on this basis, to develop new approaches to the diagnosis and treatment of neurological disorders.

Alongside my clinical and research work, I am involved in the Research Working Group of the Young Neurologists’ Section of the German Society of Neurology. There, I advocate for networking amongst young neurologists active in research, fostering exchange between clinical practice and research, and the further development of research career paths in neurology.

Since 2026,
, Clinician Scientist, Neuromodulation Section, University Department of Neurology, University Medicine Oldenburg

Since 2022
Research work at the University of Oldenburg, specialising in non-invasive neurostimulation, clinical neuroscience and Parkinson’s disease

Since 2022:
, Junior Doctor in Neurology, University Department of Neurology, University Medicine Oldenburg

2022
Granted a licence to practise medicine

2017–2018
Study visit to the Rijksuniversiteit Groningen / Universitair Medisch Centrum Groningen, Netherlands
Specialisation: Molecular Medicine

2015–2022
Studied medicine at the University of Oldenburg

2012–2015
Malteser Ambulance Service, Munich and Magdeburg
Training and work as a paramedic

2012
Obtained the General Higher Education Entrance Qualification in Munich

1. Schmidt, L.M., Stalter, J., Thiel, C.M., Janitzky, K., Witt, K. Transcutaneous auricular vagus nerve stimulation demonstrates effects on pupil responses in Parkinson’s disease. medRxiv 13 September 2026.26362895; https://doi.org/10.64898/2026.09.13.26362895

2. Stalter, J., Kasten, F., Stecher, H. Editorial “Evaluating Electric Neuromodulation Techniques through Rigorous Success Metrics”, 2026; International Journal of Psychophysiology, in press

3. Stalter, J., Stecher, H., Bücker, L., Arizpe-Gomez, P., Hein, A., Aleman, A., Herrmann, C.S., Witt, K. Theta-burst transcranial temporal interference stimulation of the nucleus accumbens to modulate motivational behaviour in Parkinson’s disease and healthy controls, in preparation

4. Stalter, J., Stecher, H., Bücker, L., Arizpe-Gomez, P., Hein, A., Aleman, A., Herrmann, C.S., Witt, K. Transcranial Temporal Interference Stimulation as a new technique to enhance motor learning and improve motor symptoms in Parkinson’s disease, under review

5. Stalter, J., Stecher, Herrmann, C.S., Witt, K. Effect of stimulation parameters for transcranial temporal interference stimulation on enhancing occipital alpha, submitted

6. Stalter, J., Bühre, E., Wessel, M., Witt, K. Individualised vs. Standardised Electrode Montages in Transcranial Temporal Interference Stimulation (tTIS): A Comparison Across Different Study Populations, in preparation

7. Yogeswaran, V., Stalter, J., Knutzen, A., Tödt, I., Gless, A., Granert, O., Baumann, A., Zeuner, K. E., Witt, K. Increased cerebellar grey matter in patients with writer’s cramp – a study using voxel-based morphometry, under review

8. Jansen, C., Stalter, J., Reuter, S. et al. Accelerated long-term forgetting as an objective marker of subjective memory impairment in multiple sclerosis. Neurol. Res. Pract. 8, 69 (2026). https://doi.org/10.1186/s42466-026-00527-y

9. Stalter, J., Witt, K. New research approaches to possible factors influencing Parkinson’s disease. DNP 27, 22–23 (2026). doi.org/10.1007/s15202-026-6699-7

10. Stalter, J., Witt, K. Parkinson’s disease in general practice. CME 23, 21–31 (2026). https://doi.org/10.1007/s11298-026-4565-8

11. Stalter, J., Aleman, A., Witt, K., Herrmann, C.S. Scientific Methods to Enhance Cognitive Performance and Brain Plasticity: Transcranial Alternating Current/Temporal Interference Stimulation, in Aron K. Barbey (ed.), The Oxford Handbook of Cognitive Enhancement and Brain Plasticity, https://doi.org/10.1093/oxfordhb/9780197677131.013.8

12. Stalter, J., & Witt, K. (2025). Transcranial pulse stimulation to treat multiple system atrophy: a case report. Journal of Neurology, 272(12), 756. doi.org/10.1007/s00415-025-13503-4

13. Stalter, J., Bömmer, T., & Witt, K. Impulse control disorders in Parkinson’s disease, DNP – Neurology & Psychiatry, 2025

14. Bömmer, T., Stalter, J., Witt, K. Continuing professional development article on epilepsy, Emergency Medicine + Rescue Medicine, 2025

15. Stalter, J., Witt, K. Activating therapies for Parkinson’s disease, DNP – Neurology & Psychiatry, 2024

16. Stalter, J., Gies, U., Mathys, C., & Witt, K. (2024). Unusual presentation of a PYGM gene mutation as late-onset McArdle disease with camptocormia: a case report. Journal of Medical Case Reports, 18(1), 465. https://doi.org/10.1186/s13256-024-04802-x

17. Stalter, J., Pars, K. & Witt, K. Accelerated long-term forgetting reveals everyday memory deficits in early-stage multiple sclerosis. J Neurol (2024). doi.org/10.1007/s00415-024-12359-4

18. Stalter, J., Yogeswaran, V., Vogel, W., Sörös, P., Mathys, C., & Witt, K. (2023). The impact of ageing on morphometric changes in the cerebellum: A voxel-based morphometry study. Frontiers in Aging Neuroscience, 15. doi.org/10.3389/fnagi.2023.1078448

19. Yogeswaran V, Stalter J, Vogel W, Sundermann B, Sörös P, Witt K. Reliability of semi-automated methods for measuring cerebrospinal fluid margins of the optic nerve: an MRI study. (Reliability of semi-automated methods for measuring cerebrospinal fluid volumes around the optic nerve: an MRI study.) In: DGN Congress 2020 – Abstracts; 2020:356.