ד"ר סיגל פורטנוי

ד"ר סיגל פורטנוי הצטרפה לחוג לריפוי בעיסוק בבית הספר למקצועות הבריאות באוקטובר 2012. ד"ר פורטנוי היא בוגרת הפקולטה להנדסה באוניברסיטת תל אביב במחלקות הנדסת חשמל ואלקטרוניקה (B.Sc.) והנדסה ביו-רפואית (M.Sc. בהצטיינות ו-Ph.D.). במהלך לימודיה המתקדמים קיבלה ד"ר פורטנוי מלגת הצטיינות מהפקולטה להנדסה וכן זכתה בפרס ARUP בעבור תרומה חדשנית בתחום ההנדסה הביו-רפואית היישומית.

עבודותיה של ד"ר פורטנוי פורסמו בכתבי עת מובילים בתחום, כגון Annals of Biomedical Engineering ,Journal of Biomechanics ,Gait & Posture בתחום של ביו-מכניקה של רקמות רכות בגוף תחת עומסים פיזיולוגיים.

ד"ר פורטנוי חוקרת את הגורמים הביומכניים המשפיעים על התפקוד של אנשים הסובלים מליקויים מוטורים בעקבות פגיעה או מחלה נויירולוגית או אורטופדית באמצעות כימות מדדים קינמטיים, קינטיים ורישום פעילות שרירית. המודלים והטכנולוגיות שיפותחו במעבדה ישמשו לניטור וטיפול שיקומי שינתן למטופל בבית או בקליניקה.

פיתוח ושימוש בטכנולוגיות לאבחון, טיפול וסיוע למבוגרים וילדים הסובלים מליקויים מוטורים על רקע אורתופדי או נויירולוגי.

1. Palevski A., I. Glaich, S. Portnoy, E. Linder-Ganz, A. Gefen. Stress relaxation of porcine gluteus muscle subjected to sudden transverse deformation as related to pressure sore modeling, Journal of Biomechanical Engineering, 128: 782-787, 2006.
2. Gefen, A., Portnoy, S., Diamant, I. Inhomogeneity of tissue-level strain distributions in individual trabeculae: mathematical model studies of normal and osteoporosis cases, Medical Engineering & Physics, 30: 624-630, 2007. 
3. Portnoy S., Yarnitzky G., Yizhar Z., Kristal A., Oppenheim U., Siev-Ner I., Gefen A. Real-time patient-specific finite element analysis of internal stresses in the soft tissues of a residual limb: a new tool for prosthetic fitting, Annals of Biomedical Engineering, 35: 120-135, 2007. 
4. Portnoy, S., Atlas, E., Gefen, A. Influence of bony prominence sharpness and underlying tissue stiffness on the susceptibility to pressure-related deep tissue injury: Biomechanical computer model studies, L’escarre [in French], Invited Paper, 36 (special issue on “Innovation and Pressure Ulcers”): 4-7, 2007. 
5. Portnoy, S., Yizhar, Z., Shabshin, N., Itzchak, Y., Kristal, A., Dotan-Marom, Y., Siev-Ner, I., Gefen, A. Internal mechanical conditions in the soft tissues of a residual limb of a trans-tibial amputee. Journal of Biomechanics, 41: 1897-1909, 2008. 
6. Portnoy S., Gefen A., Ohana A., Yizhar Z. A new system for monitoring gait training in infants with Down syndrome. Journal of Medical Devices, 3, 024501-1-024501-4, 2009. 
7. Portnoy, S., Siev-Ner, I., Shabshin, N., Kristal, A., Yizhar, Z., Gefen, A. Patient-specific analyses of deep tissue loads post transtibial amputation in residual limbs of multiple prosthetic users. Journal of Biomechanics, 42: 2686-2693, 2009.
8. Portnoy,S., Siev-Ner, I., Yizhar, Z., Kristal, A., Shabshin, N., Gefen, A. Surgical and morphological factors that affect internal mechanical loads in soft tissues of the transtibial residuum, Annals of Biomedical Engineering, 37: 2583-2605, 2009. 
9. Portnoy, S., van Haare, J., Geers, RPJ. (T), Kristal, A., Siev-Ner, I., Seelen, HAM., Oomens, CWJ., Gefen, A. Real-time subject-specific analyses of dynamic internal tissue loads in the residual limb of transtibial amputees. Medical Engineering & Physics, 32, 312-323, 2010.
10. Elsner JJ, Portnoy S, Guilak F, Shterling A, Linder-Ganz E. MRI-based characterization of bone anatomy in the human knee for size matching of a medial meniscal implant. Journal of Biomechanical Engineering. 132(10):101008, 2010. 
11. Elsner JJ, Portnoy S, Zur G, Guilak F, Shterling A, Linder-Ganz E. Design of a free-floating polycarbonate-urethane meniscal implant using finite element modeling and experimental validation. Journal of Biomechanical Engineering. 132: 095001, 2010. 
12. Portnoy, S., Siev-Ner, I., Shabshin, N., Gefen, A. Effects of sitting postures on risks for deep tissue injury in the residuum of a transtibial prosthetic-user: a biomechanical case study. Computer Methods in Biomechanics and Biomedical Engineering, 14:1009-19, 2011. 
13. Portnoy S, Vuillerme N, Payan Y, Gefen A. Clinically-oriented real-time monitoring of the individual's risk for deep tissue injury. Medical & Biological Engineering & Computing, 49(4): 473-483, 2011. Winner of the Nightingale Prize for best paper published in Medical and Biological Engineering and Computing in 2011.
14. Portnoy S, Kristal A, Gefen A, Siev-Ner I. Outdoor dynamic subject-specific evaluation of internal stresses in the residual limb: hydraulic prosthetic foot compared to energy-stored prosthetic feet. Gait & Posture, 35(1):121-5, 2012. 
15. Portnoy S, Schwartz I. Gait Characteristics of Post-Poliomyelitis Patients: Standardization of Quantitative Data Report, Annals of Physical and Rehabilitation Medicine, 56(7-8):527-41, 2013. 
16. Portnoy S, Rosenberg L, Alazraki T, Elyakim E, Friedman J. Differences in Muscle Activity Patterns, Visuomotor Abilities, and Graphical Product Quality in Children Drawing Activities on Horizontal or Vertical Surfaces, Journal of Electromyography and Kinesiology, 25(3): 540-547, 2015. 
17. Portnoy S, Halaby O, Dekel-Chen D, Dierick F . Effect of an Auditory Feedback Substitution, Tactilo-Kinesthetic, or Visual Feedback on Kinematics of Pouring Water from Kettle into Cup, Applied Ergonomics, 51: 44-49, 2015. 
18. Simana E, Simian SR, Portnoy S, Jaffe A, Dekel BC, Feasibility Study – Vitamin D Loading Determination by Ftir-Atr, Information and Control Systems, 3: 107-111, 2015. 
19. Portnoy S, Frechtel A, Raveh E, Schwartz I . Prevention of Genu Recurvatum in Post Stroke Patients Using a New Orthosis, Physical Medicine and Rehabilitation, 7(10):1042-1051, 2015. 
20. Rabin A, Portnoy S, Kozol Z. The Association Between Visual Assessment of Quality of Movement and Three-Dimensional Analysis of Pelvis, Hip, and Knee Kinematics During a Lateral Step Down Test, Journal of Strength and Conditioning Research, 30(11):3204-3211, 2016. 
21. Rabin A, Portnoy S, Kozol Z. The Association of Ankle Dorsiflexion Range of Motion With Hip and Knee Kinematics During the Lateral Step Down Test, The Journal of Orthopaedic and Sports Physical Therapy, 29:1-31, 2016. 
22. Levanon Y, Gefen A, Lerman Y, Portnoy S, Ratzon NZ. Key Strike Forces and High Level of Musculoskeletal Symptoms, Safety and Health at Work, 7:347-353, 2016. 
23. Rand D, Ben-Chaim K, Malka R, Portnoy S. Development of Internet-based Tasks for the Executive Function Performance Test, American Journal of Occupational Therapy, 72: 7202205060p1-7202205060p7, 2018.  
24. Portnoy S, Reif S, Mendelboim T, Rand D. Comparing postural control of individuals with chronic stroke to healthy participants: clinical tools and center of pressure movement. European Journal of Physical Rehabilitation Medicine, 53(5): 685-693, 2017.
25. Portnoy S, Hersch A, Sofer T, Tresser S. Comparison of reaction time and center of pressure movement between paired-play and solo-play of a virtual reality game, Games for Health Journal, 6(3), 2017.
26. Raveh E, Friedman J, Portnoy S. Visuomotor behaviours and performance in a dual-task paradigm with and without vibrotactile feedback when using a myoelectric controlled hand, Assistive Technology, 19:1-7, 2017.
27. Dierick F, Dehas M, Isambert JL, Injeyan S, Bouché AF, Bleyenheuft Y, Portnoy S. Hemorrhagic versus ischemic stroke: Who can best benefit from blended conventional physiotherapy with robotic-assisted gait therapy?, Plos One, 12(6), e0178636, 2017. 
28. Portnoy S, Mimouni-Bloch A, Rosenberg L, Offek H, Berman T, Kochavi M, Orman G, Friedman J. Graphical product quality and muscle activity in children with mild disabilities drawing on horizontal or vertical oriented tablet, American Journal of Occupation Therapy, Accepted for Publication, 2017.
29. Shoseyov D, Cohen-Kaufman T, Schwartz I, Portnoy S. Comparison of activity and fatigue of the respiratory muscles and pulmonary characteristics between post-polio patients and controls: a pilot study. Plos One, 12(7): e0182036, 2017. 
30. Raveh E, Schwartz I, Karniel N, Portnoy S. Evaluation of the Effectiveness of a Novel Gait Trainer in Increasing the Functionality of Individuals with Motor Impairment: A Case Series. Assistive Technology, 16:1-6 , 2017.
31. Kaufman-Cohen Y, Friedman J, Levanon Y, Yaacobi G, Doron N, Portnoy S. Wrist plane of motion and ranges during daily activities, American Journal of Occupation Therapy, 72, 7206205080p1-7206205080p10, 2018. 
32. Raveh E, Portnoy S, Friedman J. Adding vibrotactile feedback to a myoelectric-controlled hand improves grasping performance when online visual feedback is disturbed, Human Movement Science, 58:32-40, 2018.
33. Raveh E, Friedman J, Portnoy S. Evaluation of the effects of adding vibrotactile feedback to myoelectric prosthesis users on performance and visual attention in a dual-task paradigm, Clinical Rehabilitation, 1:269215518774104, 2018.
34. Portnoy S, Maayan C, Tsenter J, Ofran Y, Goldman V, Hiller N, Karniel N, Schwartz I. Characteristics of atactic and crouch gait in familial dysautonomia patients, Plos One, 13(4): e0196599, 2018. 
35. Raveh E, Portnoy S, Friedman J. Myoelectric prosthesis users improve performance time and accuracy using vibrotactile feedback when visual feedback is disturbed. Archives of Physical Medicine and Rehabilitation, pii: S0003-9993(18)30367-8, 2018. 
36. Kaufman-Cohen Y, Portnoy S, Sopher R,  Mashiach L, Baruch-Halaf L, Ratzon NZ. The Correlation between Upper Extremity Musculoskeletal Symptoms and Joint Kinematics, Playing Habits and Hand Span during Playing among Piano Students, Plos one, Accepted, 2018.