Na Jin Seo - Assistant Professor



Contact Information

Office Address:
USR 201D
115 East Reindl Way
Milwaukee, WI 53212
Phone: 414-229-2906
Fax: 414-229-6958
Email: seon@uwm.edu
Web: http://pantherfile.uwm.edu/seon/www

Mailing Address:
P.O. Box 784
Department of Industrial and Manufacturing Engineering
University of Wisconsin-Milwaukee
Milwaukee, WI 53201

Please see also:
Industrial Engineering Department
UWM Center for Ergonomics

Call for participants in a Hand and Grip Functions Study... See flyer for details.


 Na Jin Seo

Education

Post-doc, Rehabilitation Institute of Chicago, Northwestern University, Chicago, IL, 2009
Ph.D., Industrial and Operations Engineering, University of Michigan, Ann Arbor, Michigan, 2007
M.S., Industrial and Operations Engineering, University of Michigan, Ann Arbor, Michigan, 2005
B.S., Mechanical Engineering, POSTECH, Pohang, South Korea, 2002

Research Interests

To learn more about her research, please visit Hand Rehabilitation Laboratory.

Ergonomics, Biomechanics, Hand Rehabilitation, Skin friction, Human motor control, Neuromechanics, Upper extremity musculoskeletal disorders.

Prof. Seo currently has openings for undergraduate/graduate/postdoctoral students with a strong academic and research background.

Selected Publications (updated 7/28/2009)

  1. Seo, N.J., Fischer, H.C., Bogey, R.A., Rymer, W.Z., Kamper, D.G., Effect of a serotonin antagonist on delay in grip muscle relaxation for persons with chronic hemiparetic stroke, Clinical Neurophysiology, Clinical Neurophysiology (in Press).
  2. Seo, N.J., Fischer, H.C., Bogey, R.A., Rymer, W.Z., Kamper, D.G., Use of force feedback to improve grip force direction in persons with stroke, Archives of Physical Medicine and Rehabilitation (in Press).
  3. Seo, N.J., Rymer, W.Z., Kamper, D.G., 2010. Altered Digit Force Direction during Pinch Grip Following Stroke. Experimental Brain Research,  202 (4) 891-901.
  4. Seo, N.J., Armstrong, T.J., Young, J.G., 2010, Effects of Handle Orientation, Gloves, Handle Friction and Elbow Posture on Maximum Horizontal Pull and Push Forces. Ergonomics, 53 (1) 92-101
  5. Seo, N.J., Armstrong, T.J., 2009, Biomechanical Analysis for Handle Stability during Maximum Push and Pull Exertions. Ergonomics, 52 (12) 1568-1575.
  6. Seo, N.J., Rymer, W.Z., Kamper, D.G., 2009, Delays in Grip Initiation and Termination in Persons with Stroke: Effects of Arm Support and Active Muscle Stretch Exercise, Journal of Neurophysiology, 101, 3108-3115.
  7. Seo, N.J., 2009, Dependence of Safety Margins in Grip Force on Isometric Push Force Levels in Lateral Pinch. Ergonomics, 52 (7) 840-847.
  8. Seo, N.J., Armstrong, T.J., Drinkaus, P., 2009. A Comparison of Two Methods of Measuring Static Coefficient of Friction at Low Normal Forces: A Pilot Study. Ergonomics, 52 (1) 121-135.
  9. Seo, N.J., Armstrong, T.J., Friction Coefficients in a Longitudinal Direction between the Finger Pad and Selected Materials for Different Normal Forces and Curvatures. Ergonomics, 52 (5) 609-616.
  10. Seo, N.J., Kamper, D.G., 2008. Effect of Arm Posture, Arm Support, and Muscle Stretch on Sustained Finger Flexor Activity Following Stroke. Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vancouver, Canada.
  11. Seo, N.J., Armstrong, T.J., Ashton-Miller, J.A., Chaffin, D.B., 2008. Wrist Strength is Dependent on Simultaneous Power Grip Intensity. Ergonomics, 51 (10) 1594-1605.
  12. Seo, N.J., Armstrong, T.J.. Investigation of Grip Force, Normal Force, Contact Area, Hand Size, and Handle Size for Cylindrical Handles. Human Factors: Journal of Human Factors and Ergonomics Society, 50 (5) 734-744.
  13. Seo, N.J., Armstrong, T.J., Chaffin, D.B., Ashton-Miller, JA  The Effect of Handle Friction and Inward or Outward Torque on Maximum Axial Push Force. Human Factors, 50 (2) April 2008, 227-236.*
  14. Seo, NJ, Armstrong, TJ, Chaffin, DB & Ashton-Miller, JA Inward Torque and High-Friction Handles Can Reduce Required Muscle Efforts for Torque Generation . Human Factors, 50 (1) Feb 2008, 37-48.*
  15. Gusich, B., Armstrong, T.J., Seo, N.J., Grieshaber, D.C., 2008  Development of a computerized model for evaluation of manual insertion of flexible hoses in automobile assembly. Proceedings of Human Factors and Ergonomics Society 52nd Annual Meeting. New York, NY: Human Factors and Ergonomics Society.
  16. Seo, N.J., Armstrong, T.J., Ashton-Miller, J.A., Chaffin, D.B., 2007  The Effect of Torque Direction and Cylindrical Handle Diameter on the Coupling between the Hand and a Cylindrical Handle. Journal of Biomechanics, 40, 3236-3243.

Books

Seo, N.J., 2008. Biomechanical Models of Hand Coupling for Axial Torque and Push Exertions. VDM Verlag Dr. Müller. ISBN: 978-3-8364-6431-4

Garg, A., Campbell-Kyureghyan, N., Seo, N.J., Yalla, S.V., Kapellusch, J.M., 2009. Chapter 27 Distal Upper Extremities: Musculoskeletal Disorders, Job Evaluation and Design Principles, In: Anna, D.H., “The Occupational Environment – Its Evaluation, Control, and Management,” 3rd ed., American Industrial Hygiene Association (AIHA).

Proceedings / Abstracts / Presentations

  1. Seo, N.J., Kamper, D.G., 2009 Excessive Shear Force at the Digits May Contribute to Unstable Grip Following Stroke. The ASME Summer Bioengineering Conference, Lake Tahoe, CA.
  2. Seo, N.J., Armstrong, T.J., Dannecker, K.L. (2007). Effect of Simultaneous Grip on Wrist Strength. Human Factors and Ergonomics Society 51st Annual Meeting.
  3. Seo, N.J., Armstrong, T.J., Konishi, Y. (2007). The Effect of Handle Friction and Torque on Axial Push Force. American Society of Biomechanics, 31st Annual Meeting.
    Poster - The Effect of Handle Friction, Inward/Outward Torque, and Handle Stability on Maximum Axial Push Force
  4. Seo, N.J., Armstrong, T.J., Dannecker, K.L. (2007). The Effect of Friction and Arm Posture on Max Push / Pull Force. American Society of Biomechanics, 31st Annual Meeting.
  5. Seo, N.J., Armstrong, T.J., Ashton-Miller, J. (2006) Grip Forces Measured with Different Methods. In Proceedings of the 16th World Congress on Ergonomics, International Ergonomics Association, Maastricht, Netherlands.
  6. Seo, N.J., Armstrong, T.J. (2006) A preferred orientation of a cylindrical hand dynamometer for measuring grip force. The 28th International Congress on Occupational Health, Milan, Italy.
  7. Seo, N.J., Armstrong, T.J. (2006) The Effect of Torque Direction on Hand-object Coupling. The 30th Annual Meeting of the American Society of Biomechanics, Blacksburg, VA.
  8. Seo, N.J., Brown, S.H. (2006) Dependence of safety margins on isometric push force levels. The Society for Neuroscience 36th Annual Meeting, Atlanta, GA.
  9. Seo, N.J., Armstrong, T.J., Ashton-Miller, J., Chaffin, D.B. (2006) Development of a Biomechanical Model for Grip, Twist and Friction - How to Open a Pickle Jar? 2006 Engineering Graduate Student Symposium, Ann Arbor, MI.
    Poster - Development of a Biomechanical Model for Grip, Twist and Friction - How to Open a Pickle Jar?
  10. Seo, N.J., Armstrong, T. J., Drinkaus, P. (2005) Methods to Measure Static Coefficient of Friction between Hand and Other Materials. The International Society of Biomechanics XXth meeting / American Society of Biomechanics 29th meeting, Cleveland, OH.
    Poster- Measure of Static Coefficient of Friction at Low Hand Contact Forces
  11. Grieshaber, D.C., Armstrong, T.J., Seo, N.J. (2005) Forearm Muscle Activity During Three Hose Insertion Tasks As Measured By Surface Electromyography of the Flexor Digitorum Superficialis Muscle. The International Society of Biomechanics XXth meeting/American Society of Biomechanics 29th meeting, Cleveland, OH.

Grants

  1. Delays in Muscle Relaxation: A Novel Approach to Neuromechanism-based Stroke Rehabilitation (Seo PI), American Heart Association Scientist Development Grant, 2011-2015.
  2. Prevention of Ladder Fall by Improved Somatosensation and Optimal Rung Design (Hur PI, Seo mentor), National Institute of Occupational Safety and Health (NIOSH), 2011-2012.
  3. Investigation of Hand Functional Grip and Release In Persons with Stroke. American Heart Association. Seo (PI) 2009-2010.
  4. Effects of Glove and Ladder Rung Design on Fall from Ladders. National Institute of Occupational Safety and Health (NIOSH). Seo (PI) 2010-2011.
  5. Development of gender-specific rehabilitation strategies for women following stroke. Wisconsin Women's Health Foundation. Seo (PI) 2010-2012.
  6. Ergonomic Interventions for Altered Grip Force Direction in Stroke Survivors. UWM Research Growth Initiative. Seo (PI) 2010-2011.