Gravitational demand on the neck musculature during tablet computer use

References

• Adams, M. A. , and P.  Dolan . 2005. “Spine Biomechanics.” Journal of Biomechanics  38 (10): 1972–1983. doi: 10.1016/j.jbiomech.2005.03.028.
   PubMed Web of Science ®Google Scholar
• Amevo, B. , D.  Worth , and N.  Bogduk . 1991. “Instantaneous Axes of Rotation of the Typical Cervical Motion Segments: A Study in Normal Volunteers.” Clinical Biomechanics (Bristol, Avon)  6 (2): 111–117. doi: 10.1016/0268-0033(91)90008-E.
   PubMed Web of Science ®Google Scholar
• Anderst, W. J. , W. F.  Donaldson  3rd , J. Y.  Lee , and J. D.  Kang . 2013. “Cervical Motion Segment Percent Contributions to Flexion-Extension During Continuous Functional Movement in Control Subjects and Arthrodesis Patients.” Spine (Phila Pa 1976)  38 (9): E533–E539.
   PubMed Web of Science ®Google Scholar
• Ariens, G. A. , P. M.  Bongers , M.  Douwes , M. C.  Miedema , W. E.  Hoogendoorn , G.  Van Der Wal , L. M.  Bouter , and W.  Van Mechelen . 2001. “Are Neck Flexion, Neck Rotation, and Sitting at Work Risk Factors for Neck Pain? Results of a Prospective Cohort Study.” Occupational and Environmental Medicine  58 (3): 200–207.
   PubMed Web of Science ®Google Scholar
• Blangsted, A. K. , G.  Sjøgaard , P.  Madeleine , H. B.  Olsen , and K.  Søgaard . 2005. “Voluntary Low-Force Contraction Elicits Prolonged Low-Frequency Fatigue and Changes in Surface Electromyography and Mechanomyography.” Journal of Electromyography and Kinesiology  15 (2): 138–148. doi: 10.1016/j.jelekin.2004.10.004.
   PubMed Web of Science ®Google Scholar
• Caneiro, J. P. , P.  O'sullivan , A.  Burnett , A.  Barach , D.  O'neil , O.  Tveit , and K.  Olafsdottir . 2010. “The Influence of Different Sitting Postures on Head/Neck Posture and Muscle Activity.” Manual Therapy  15 (1): 54–60. doi: 10.1016/j.math.2009.06.002.
   PubMed Web of Science ®Google Scholar
• Chaffin, D. B.   1973. “Localized Muscle Fatigue – Definiton and Measurement.” Journal of Occupational Medicine  15 (4): 346–354.
   PubMedGoogle Scholar
• Clauser, C. E. , J. T.  Mcconville , and J. M.  Young . 1979. Weight, Volume and Center of Mass of Segments of the Human Body. Wright-Patterson Air Force Base, OH: Aerospace Medical Research Laboratory.
   Google Scholar
• Côté, P. , J. D.  Cassidy , L. J.  Carroll , and V.  Kristman . 2004. “The Annual Incidence and Course of Neck Pain in the General Population: A Population-Based Cohort Study.” Pain  112 (3): 267–273. doi: 10.1016/j.pain.2004.09.004.
   PubMed Web of Science ®Google Scholar
• Finsen, L.   1999. “Biomechanical Aspects of Occupational Neck Postures During Dental Work.” International Journal of Industrial Ergonomics  23 (5–6): 397–406. doi: 10.1016/S0169-8141(97)00061-9.
   Web of Science ®Google Scholar
• Gosselin, G. , H.  Rassoulian , and I.  Brown . 2004. “Effects of Neck Extensor Muscles Fatigue on Balance.” Clinical Biomechanics (Bristol, Avon)  19 (5): 473–479. doi: 10.1016/j.clinbiomech.2004.02.001.
   PubMed Web of Science ®Google Scholar
• Green, B. N.   2008. “A Literature Review of Neck Pain Associated with Computer Use: Public Health Implications.” Journal of the Canadian Chiropractic Association  52 (3): 161–167.
   PubMedGoogle Scholar
• Harms-Ringdahl, K. , and J.  Ekholm . 1986. “Intensity and Character of Pain and Muscular Activity Levels Elicited by Maintained Extreme Flexion Position of the Lower-Cervical-Upper-Thoracic Spine.” Scandinavian Journal of Rehabilitation Medicine  18 (3): 117–126.
   PubMedGoogle Scholar
• Harms-Ringdahl, K. , J.  Ekholm , K.  Schüldt , G.  Németh , and U. P.  Arborelius . 1986. “Load Moments and Myoelectric Activity When the Cervical Spine is Held in Full Flexion and Extension.” Ergonomics  29 (12): 1539–1552. doi: 10.1080/00140138608967267.
   PubMed Web of Science ®Google Scholar
• Harms-Ringdahl, K. , and K.  Schüldt . 1989. “Maximum Neck Extension Strength and Relative Neck Muscular Load in Different Cervical Spine Positions.” Clinical Biomechanics (Bristol, Avon)  4 (1): 17–24. doi: 10.1016/0268-0033(89)90063-6.
   PubMed Web of Science ®Google Scholar
• Hünting, W. , T.  Grandjean , and E.  Grandjean . 1981. “Postural and Visual Loads at VDT Workplaces. I. Constrained Postures.” Ergonomics  24 (12): 917–931. doi: 10.1080/00140138108924914.
   PubMed Web of Science ®Google Scholar
• Jonsson, B.   1982. “Measurement and Evaluation of Local Muscular Strain in the Shoulder During Constrained Work.” Journal of Human Ergology (Tokyo)  11 (1): 73–88.
   PubMedGoogle Scholar
• Lau, K. T. , K. Y.  Cheung , K. B.  Chan , M. H.  Chan , K. Y.  Lo , and T. T.  Wing Chiu . 2010. “Relationships Between Sagittal Postures of Thoracic and Cervical Spine, Presence of Neck Pain, Neck Pain Severity and Disability.” Manual Therapy  15 (5): 457–462. doi: 10.1016/j.math.2010.03.009.
   PubMed Web of Science ®Google Scholar
• Lin, L. I.   1989. “A Concordance Correlation Coefficient to Evaluate Reproducibility.” Biometrics  45 (1): 255–268. doi: 10.2307/2532051.
   PubMed Web of Science ®Google Scholar
• Marcus, M. , F.  Gerr , C.  Monteilh , D. J.  Ortiz , E.  Gentry , S.  Cohen , A.  Edwards , C.  Ensor , and D.  Kleinbaum . 2002. “A Prospective Study of Computer Users: II. Postural Risk Factors for Musculoskeletal Symptoms and Disorders.” American Journal of Industrial Medicine  41 (4): 236–249. doi: 10.1002/ajim.10067.
   PubMed Web of Science ®Google Scholar
• McGill, S. M. , K.  Jones , G.  Bennett , and P. J.  Bishop . 1994. “Passive Stiffness of the Human Neck in Flexion, Extension, and Lateral Bending.” Clinical Biomechanics (Bristol, Avon)  9 (3): 193–198. doi: 10.1016/0268-0033(94)90021-3.
   PubMed Web of Science ®Google Scholar
• NASA . 1978. Anthropometric Source Book, Vol. 1: Anthropometry for Designers [Reference Publication 1024]. Hanover, MD: National Aeronautics and Space Administration, Scientific and Technical Information Office.
   Google Scholar
• Nevins, D. D. , L.  Zheng , and A. N.  Vasavada . 2014. “Inter-Individual Variation in Vertebral Kinematics Affects Predictions of Neck Musculoskeletal Models.” Journal of Biomechanics  47 (13): 3288–3294. doi: 10.1016/j.jbiomech.2014.08.017.
   PubMed Web of Science ®Google Scholar
• Schüldt, K. , J.  Ekholm , K.  Harms-Ringdahl , G.  Németh , and U. P.  Arborelius . 1986. “Effects of Changes in Sitting Work Posture on Static Neck and Shoulder Muscle Activity.” Ergonomics  29 (12): 1525–1537. doi: 10.1080/00140138608967266.
   PubMed Web of Science ®Google Scholar
• Schüldt, K. , and K.  Harms-Ringdahl . 1988. “Cervical Spine Position Versus E.M.G. Activity in Neck Muscles During Maximum Isometric Neck Extension.” Clinical Biomechanics (Bristol, Avon)  3 (3): 129–136. doi: 10.1016/0268-0033(88)90058-7.
   PubMed Web of Science ®Google Scholar
• Shan, Z. , G.  Deng , J.  Li , Y.  Li , Y.  Zhang , and Q.  Zhao . 2013. “Correlational Analysis of Neck/Shoulder Pain and Low Back Pain with the Use of Digital Products, Physical Activity and Psychological Status Among Adolescents in Shanghai.” PLoS One  8 (10): e78109. doi: 10.1371/journal.pone.0078109.
   PubMed Web of Science ®Google Scholar
• Silva, A. G. , T. D.  Punt , P.  Sharples , J. P.  Vilas-Boas , and M. I.  Johnson . 2009. “Head Posture and Neck Pain of Chronic Nontraumatic Origin: A Comparison Between Patients and Pain-Free Persons.” Archives of Physical Medicine and Rehabilitation  90 (4): 669–674. doi: 10.1016/j.apmr.2008.10.018.
   PubMed Web of Science ®Google Scholar
• Søgaard, K. , A. K.  Blangsted , L. V.  Jørgensen , P.  Madeleine , and G.  Sjøgaard . 2003. “Evidence of Long Term Muscle Fatigue Following Prolonged Intermittent Contractions Based on Mechano- and Electromyograms.” Journal of Electromyography and Kinesiology  13 (5): 441–450. doi: 10.1016/S1050-6411(03)00075-0.
   PubMed Web of Science ®Google Scholar
• Starr, S. J. , S. J.  Shute , and C. R.  Thompson . 1985. “Relating Posture to Discomfort in VDT Use.” Journal of Occupational Medicine  27 (4): 269–271.
   PubMedGoogle Scholar
• Straker, L. M. , J.  Coleman , R.  Skoss , B. A.  Maslen , R.  Burgess-Limerick , and C. M.  Pollock . 2008. “A Comparison of Posture and Muscle Activity During Tablet Computer, Desktop Computer and Paper Use by Young Children.” Ergonomics  51 (4): 540–555. doi: 10.1080/00140130701711000.
   PubMed Web of Science ®Google Scholar
• Straker, L. , R.  Skoss , A.  Burnett , and R.  Burgess-Limerick . 2009. “Effect of Visual Display Height on Modelled Upper and Lower Cervical Gravitational Moment, Muscle Capacity and Relative Strain.” Ergonomics  52 (2): 204–221. doi: 10.1080/00140130802331609.
   PubMed Web of Science ®Google Scholar
• Thuresson, M. , B.  Äng , J.  Linder , and K.  Harms-Ringdahl . 2005. “Mechanical Load and EMG Activity in the Neck Induced by Different Head-Worn Equipment and Neck Postures.” International Journal of Industrial Ergonomics  35 (1): 13–18. doi: 10.1016/j.ergon.2004.06.008.
   Web of Science ®Google Scholar
• Vasavada, A. N. , J.  Danaraj , and G. P.  Siegmund . 2008. “Head and Neck Anthropometry, Vertebral Geometry and Neck Strength in Height-Matched Men and Women.” Journal of Biomechanics  41 (1): 114–121. doi: 10.1016/j.jbiomech.2007.07.007.
   PubMed Web of Science ®Google Scholar
• Vasavada, A. N. , S.  Li , and S. L.  Delp . 1998. “Influence of Muscle Morphometry and Moment Arms on the Moment-Generating Capacity of Human Neck Muscles.” Spine (Phila Pa 1976)  23 (4): 412–422. doi: 10.1097/00007632-199802150-00002.
   PubMed Web of Science ®Google Scholar
• Werth, A. , and K.  Babski-Reeves . 2014. “Effects of Portable Computing Devices on Posture, Muscle Activation Levels and Efficiency.” Applied Ergonomics  45 (6): 1603–1609. doi: 10.1016/j.apergo.2014.05.008.
   PubMed Web of Science ®Google Scholar
• Westgaard, R. H. , and J.  Winkel . 1996. “Guidelines for Occupational Musculoskeletal Load as a Basis for Intervention: A Critical Review.” Applied Ergonomics  27 (2): 79–88. doi: 10.1016/0003-6870(95)00062-3.
   PubMed Web of Science ®Google Scholar
• Wu, S. K. , L. C.  Kuo , H. C.  Lan , S. W.  Tsai , and F. C.  Su . 2010. “Segmental Percentage Contributions of Cervical Spine During Different Motion Ranges of Flexion and Extension.” Journal of Spinal Disorders & Techniques  23 (4): 278–284. doi: 10.1097/BSD.0b013e3181a98d26.
   PubMed Web of Science ®Google Scholar
• Wu, G. , S.  Siegler , P.  Allard , C.  Kirtley , A.  Leardini , D.  Rosenbaum , M.  Whittle , D. D.  D'lima , L.  Cristofolini , H.  Witte , O.  Schmid , and I.  Stokes . 2002. “ISB Recommendation on Definitions of Joint Coordinate System of Various Joints for the Reporting of Human Joint Motion – Part I: Ankle, Hip, and Spine.” Journal of Biomechanics  35 (4): 543–548.
   PubMed Web of Science ®Google Scholar
• Yip, C. H. , T. T.  Chiu , and A. T.  Poon . 2008. “The Relationship Between Head Posture and Severity and Disability of Patients with Neck Pain.” Manual Therapy  13 (2): 148–154. doi: 10.1016/j.math.2006.11.002.
   PubMed Web of Science ®Google Scholar
• Young, J. G. , M.  Trudeau , D.  Odell , K.  Marinelli , and J. T.  Dennerlein . 2012. “Touch-Screen Tablet User Configurations and Case-Supported Tilt Affect Head and Neck Flexion Angles.” Work  41 (1): 81–91.
   PubMedGoogle Scholar
• Young, J. G. , M. B.  Trudeau , D.  Odell , K.  Marinelli , and J. T.  Dennerlein . 2013. “Wrist and Shoulder Posture and Muscle Activity During Touch-Screen Tablet Use: Effects of Usage Configuration, Tablet Type, and Interacting Hand.” Work  45 (1): 59–71.
   PubMedGoogle Scholar
• Zajac, F. E.   1989. “Muscle and Tendon: Properties, Models, Scaling, and Application to Biomechanics and Motor Control.” Critical Reviews in Biomedical Engineering  17 (4): 359–411.
   PubMed Web of Science ®Google Scholar
• Zheng, L. , G.  Siegmund , G.  Ozyigit , and A.  Vasavada . 2013. “Sex-Specific Prediction of Neck Muscle Volumes.” Journal of Biomechanics  46 (5): 899–904. doi: 10.1016/j.jbiomech.2012.12.018.
   PubMed Web of Science ®Google Scholar
• Zickuhr, K. , and L.  Raine . 2014. E-Reading Rises as Device Ownership Jumps, http://www.pewinternet.org/2014/01/16/e-reading-rises-as-device-ownership-jumps/ .
   Google Scholar