Author

Roberto M. de Freitas

University of PittsburghORCID 0000-0002-4169-5692Unclaimed ORCID profile · follow to get notified of new preprints

Biology Disciplines

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Bioengineering· 2 Neuroscience· 2

Signature Assays, Organisms & Methods

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Organism:human· 3 Approach:experimental assay· 2 Research Focus:host-pathogen & immune response· 2 Research Focus:benchmarking· 1 Research Focus:cell signaling & trafficking· 1 Research Focus:development & morphogenesis· 1 Assay:electronic health records· 1 Assay:electrophysiology· 1

Frequent Co-Authors

Amy BoosiD· 2 shared George Frederick WittenbergiD· 2 shared Marco CapogrossoiD· 2 shared Matija MiloseviciD· 2 shared Abdallah AlashqariD· 1 shared Andreas RowaldiD· 1 shared Atsushi SasakiiD· 1 shared Douglas J. WeberiD· 1 shared

Activity by Year

2022-2026 · peak 3/yr

Co-Author Collaboration Network

10 top collaborators · 22 mutual co-author links

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2 shared papersBioengineering

Amy BoosORCID

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Author profile →

4 papers

Recent·Most cited

Cervical spinal cord stimulation disrupts proprioception yet improves voluntary arm reaching

Erick Carranza, Roberto M. de Freitas, Nikhil Verma, Luigi Borda, Erynn Sorensen, Amy Boos, George Frederick Wittenberg, Lee E. Fisher, Marc P. Powell, Peter Carlos Gerszten, Douglas J. Weber, John W. Krakauer, Jonathan Sanching Tsay, Marco Capogrosso, Elvira Pirondini

This study shows that cervical spinal cord stimulation impairs proprioception but improves voluntary arm reaching in post-stroke patients.

bioRxiv · Jun 23, 2026 · PreprintBioengineering

Mapping the Causal Roles of Non-Primary Motor Areas in Human Reach Planning and Execution

Golnaz Haddadshargh, Roberto M. de Freitas, Jennifer Mak, Amy Boos, Xiaoqi Fang, Jennifer L. Collinger, Gina McKernan, Liang Zhan, Fang Liu, George Frederick Wittenberg

This study uses TMS and fMRI to investigate how non-primary motor areas affect reaching performance, finding that PMd and PPC perturbations alter movement smoothness and accuracy.

Human Brain Mapping · Feb 1, 2026Peer-reviewedBioengineering

Virtual prototyping of non-invasive spinal cord electrical stimulation targeting upper limb motor function

Abdallah Alashqar, Nabila Brihmat, Vincent Gemar, Zhaoshun Hu, Seong-Ryong Koh, Sandra Diaz-Pier, Roberto M. de Freitas, Atsushi Sasaki, Matija Milosevic, Rodolfo Keesey, Ismael Seáñez, Esra Neufeld, Hélène Cassoudesalle, Ursula S. Hofstoetter, Karen Minassian, , Andreas Rowald

The paper develops a computational model to simulate tSCS effects on motor function, finding that somatosensory afferents have lower thresholds than motor efferents, and that anode placement and waveform type influence recruitment patterns.

bioRxiv · Jan 24, 2026 · PreprintNeuroscience

Preferential activation of proprioceptive and cutaneous sensory fibers compared to motor fibers during cervical transcutaneous spinal cord stimulation: A computational study

Roberto M. de Freitas, Marco Capogrosso, Taishin Nomura, Matija Milosevic

This study uses a computational model to show that cervical tSCS preferentially activates sensory fibers over motor fibers, suggesting high proprioceptive and cutaneous contributions to neural activation.

Journal of Neural Engineering · Apr 26, 2022Peer-reviewedNeuroscience