CV
Education
- PhD, Biomedical Engineering, University of Kentucky, 2021
- Dissertation: Analysis of Graded Sensorimotor Rhythms for Brain-Computer Interface Applications
- Advisor: Sridhar Sunderam, PhD
- BS, Biomedical Engineering, Purdue University, 2016
- Concentration: Neural Engineering
- Minor: Psychology
Research Experience
Senior Biomedical Engineering Researcher NASA Glenn Research Center / Universities Space Research Association 2023–Present - Lead applied biomedical research supporting medical capabilities for long-duration human spaceflight and exploration.
- Develop, evaluate, and translate physiological monitoring and diagnostic technologies across laboratory, operational, analog, and flight environments.
- Lead research involving integrated medical devices, portable X-ray systems, physiological monitoring, and human-subject testing.
- Collaborate across NASA centers, commercial spaceflight partners, clinical institutions, and academic research groups.
Postdoctoral Fellow, Brain-Machine Interfaces Cleveland Clinic, Taylor Lab 2021–2023 - Investigated neural control of upper-limb movement using intracortical recordings, electromyography, biomechanical modeling, and functional electrical stimulation.
- Developed and evaluated real-time brain-machine interfaces for decoding movement and limb stiffness.
- Conducted research involving human and non-human primate neural interfaces, wearable motion sensing, and deep brain stimulation.
- Contributed to surgical planning and implantation procedures involving cortical and deep-brain electrodes.
Graduate Research Assistant University of Kentucky, Neural Systems Lab 2016–2021 - Developed brain-machine interface approaches for motor rehabilitation in healthy participants and individuals with neurological impairment.
- Designed human-subject experiments and neural decoding methods using EEG, EMG, force measurements, and wearable sensing.
- Investigated graded motor effort as a source of continuous control information for brain-computer interfaces.
- Mentored undergraduate researchers in EEG, biosignal processing, and experimental methods.
Undergraduate Researcher Purdue University, Central Auditory Processing Laboratory 2015–2016 - Conducted undergraduate research in auditory neuroscience and biomedical signal analysis.
Additional Experience
Heart Transplant Tissue Procurer Cleveland Clinic 2023 - Participated in heart transplant procurement procedures and coordinated collection of human cardiac tissue for research applications.
Graduate Teaching Assistant, First-Year Engineering University of Kentucky 2017 - Taught first-year engineering students through project-based coursework involving Arduino, instrumentation, and MATLAB programming.
Research Intern Accelerated Rehabilitation Technologies / Washington University in St. Louis 2015 - Developed MATLAB-based signal processing, data visualization, and motion-sensing tools for rehabilitation applications.
- Conducted research involving movement biomechanics in individuals with neuromuscular disorders.
Development Engineering Co-op Zimmer 2014 - Designed, prototyped, and tested orthopedic implants and surgical instruments for bone fracture fixation.
- Developed CAD models and experimental protocols for evaluating new product concepts.
New Product Development Intern Transposagen Biopharmaceuticals 2013 - Supported development and commercialization activities for genetic engineering technologies.
- Worked across laboratory research and business development teams.
Technical Competencies
View detailed technical competencies
Publications
Assessing Multi-Functional Integrated Medical Device Performance for Future Space Operations
Haddix, Miller, and Lewandowski. "Assessing Multi-Functional Integrated Medical Device Performance for Future Space Operations." npj Microgravity. In review.
Downselection of Miniature X-Ray System for Spaceflight Applications
Tokarz, A. E., Myers, J. G., & Haddix, C. A. (2026). "Downselection of Miniature X-Ray System for Spaceflight Applications." NASA Technical Memorandum, NASA/TM-20260002492.
Electroencephalogram Features Reflect Effort Corresponding to Graded Finger Extension: Implications for Hemiparetic Stroke
Haddix et al. (2025). "Electroencephalogram Features Reflect Effort Corresponding to Graded Finger Extension: Implications for Hemiparetic Stroke." Biomedical Physics & Engineering Express. 11(2).
Simplified Control of Neuromuscular Stimulation Systems for Restoration of Reach With Limb Stiffness as a Modifiable Degree of Freedom
Johnson et al. (2025). "Simplified Control of Neuromuscular Stimulation Systems for Restoration of Reach With Limb Stiffness as a Modifiable Degree of Freedom." Journal of Neural Engineering. 22(3).
Reconnecting the Hand and Arm to the Brain: Efficacy of Neural Interfaces for Sensorimotor Restoration After Tetraplegia
Herring et al. (2024). "Reconnecting the Hand and Arm to the Brain: Efficacy of Neural Interfaces for Sensorimotor Restoration After Tetraplegia." Neurosurgery. 94(4).
Analysis of Graded Sensorimotor Rhythms for Brain-Computer Interface Applications
Haddix, C. A. (2021). "Analysis of Graded Sensorimotor Rhythms for Brain-Computer Interface Applications." Theses and Dissertations--Biomedical Engineering. 74.
Prediction of Isometric Handgrip Force from Graded Event-Related Desynchronization of the Sensorimotor Rhythm
Haddix et al. (2021). "Prediction of Isometric Handgrip Force from Graded Event-Related Desynchronization of the Sensorimotor Rhythm." Journal of Neural Engineering. 18(5).
A Comparison of EEG Alpha Rhythm Detection by Tripolar Concentric Ring Electrodes and Conventional Disk Electrodes
Haddix et al. (2019). "A Comparison of EEG Alpha Rhythm Detection by Tripolar Concentric Ring Electrodes and Conventional Disk Electrodes." IEEE International Symposium on Signal Processing and Information Technology.
Noninvasive Seizure Prediction Using Autonomic Measurements in Patients With Refractory Epilepsy
Al-Bakri et al. (2018). "Noninvasive Seizure Prediction Using Autonomic Measurements in Patients With Refractory Epilepsy." 2018 40th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. 2422-2425.
Implementation of Low-Pass Fractional Filtering for the Purpose of Analysis of Electroencephalographic Signals
Kawala-Janik et al. (2018). "Implementation of Low-Pass Fractional Filtering for the Purpose of Analysis of Electroencephalographic Signals." Non-Integer Order Calculus and its Applications: 9th International Conference on Non-Integer Order Calculus and Its Applications. 63-73.
Upper Extremity Movement Reliability and Validity of the Kinect v2
Reither et al. (2018). "Upper Extremity Movement Reliability and Validity of the Kinect v2." Disability and Rehabilitation: Assistive Technology. 13(1).
Trial Measurement of Movement-Related Cortical Dynamics Using Electroencephalography and Diffuse Correlation Spectroscopy
Haddix et al. (2017). "Trial Measurement of Movement-Related Cortical Dynamics Using Electroencephalography and Diffuse Correlation Spectroscopy." 2017 22nd International Conference on Methods and Models in Automation and Robotics. 642-645.
Presentations
Society for Neuroscience, 2022
Presentation at Neuroscience Meeting, 2022 at Convention Center, San Diego
BCI Society Meeting, 2021
Presentation at BCI Society Meeting, 2021 at Virtual, Virtual
Society for Neuroscience, 2019
Presentation at Neuroscience Meeting, 2019 at Convention Center, Chicago, IL
Biomedical Engineering Society Meeting, 2018
Talk at 2018 Biomedical Engineering Society Meeting, Atlanta, Georgia
Engineering in Medicine and Biology Conference, 2018
Talk at Honolulu Convention Center, Honolulu, HI
Service, Leadership, and Outreach
Program Lead, NASA Glenn High School Engineering Institute 2026 Program Lead, NASA Glenn / Cleveland State Pre-Apprenticeship and Career Exploration Program 2026 Poster Judge, NASA Human Research Program Investigators’ Workshop 2024–2025 Research Mentor 2024–Present - Mentor student interns participating in biomedical engineering and human spaceflight research.
Graduate Student Mentor, University of Kentucky 2016–2021 - Mentored undergraduate researchers in EEG, biosignal analysis, and experimental research.