1. Bohannon RW, Larkin PA, Smith MB, Horton MG. Shoulder pain in hemiplegia: statistical relationship with five variables. Arch Phys Med Rehabil. 1986. 67:514–516.

2. Hedtmann A, Fett H. Ultrasonography of the shoulder in subacromial syndrome with disorders and injuries of the rotator cuff. Orthopade. 1995. 24:498–508.

3. van Moppes FI, Veldkamp O, Roorda J. Role of shoulder ultrasonography in the evaluation of the painful shoulder. Eur J Radiol. 1995. 19:142–146.

4. Joynt RL. The source of shoulder pain in hemiplegia. Arch Phys Med Rehabil. 1992. 73:409–413.

5. Brandstater ME. DeLisa JA, Gans BM, editors. Stroke Rehabilitation. Physical Medicine & Rehabilitation. 2005. 4th ed. Philadelphia: Lippincott Williams & Wilkins;1667–1668.

6. Miyamoto S, Kondo T, Suzukamo Y, Michimata A, Izumi S. Reliability and validity of the Manual Function Test in patients with stroke. Am J Phys Med Rehabil. 2009. 88:247–255.

7. Bohannon RW, Smith MB. Interrater reliability of a modified Ashworth scale of muscle spasticity. Phys Ther. 1987. 67:206–207.

8. Brashear A, Zafonte R, Corcoran M, Galvez-Jimenez N, Gracies JM, Gordon MF, McAfee A, Ruffing K, Thompson B, Williams M, Lee CH, Turkel C. Inter- and intrarater reliability of the Ashworth Scale and the Disability Assessment Scale in patients with upper-limb poststroke spasticity. Arch Phys Med Rehabil. 2002. 83:1349–1354.

9. Middleton WD. Ultrasonography of the shoulder. Radiol Clin North Am. 1992. 30:927–940.

10. Peetrons P, Rasmussen OS, Creteur V, Chhem RK. Ultrasound of the shoulder joint: non 'rotator cuff' lesions. Eur J Ultrasound. 2001. 14:11–19.

11. Chhem R, Cardinal E. Guidelines and gamuts in musculoskeletal untrasound. 1999. 1st ed. New Yok: Wiley-Liss.

12. Teefey SA, Hasan SA, Middleton WD, Patel M, Wright RW, Yamaguchi K. Ultrasonography of the rotator cuff. A comparison of ultrasonographic and arthroscopic findings in one hundred consecutive cases. J Bone Joint Surg Am. 2000. 82:498–504.

13. McLean DE. Medical complications experienced by a cohort of stroke survivors during inpatient, tertiary-level stroke rehabilitation. Arch Phys Med Rehabil. 2004. 85:466–469.

14. Fodor D, Poanta L, Felea I, Rednic S, Bolosiu H. Shoulder impingement syndrome: correlations between clinical tests and ultrasonographic findings. Ortop Traumatol Rehabil. 2009. 11:120–126.

15. Kim SK, Lee KL, Han GS. Ultrasonographic Evaluation of the Painful Hemiplegic Shoulder. J Korean Acad Rehab Med. 1999. 23:622–629.

16. Ko MH, Kim JY, Park SH, Kim NG, Seo JH. Comparison of Ultrasonographic Findings with Clinical Findings in Hemiplegic Shoulder. J Korean Acad Rehab Med. 2006. 30:213–218.

17. Huang YC, Liang PJ, Pong YP, Leong CP, Tseng CH. Physical findings and sonography of hemiplegic shoulder in patients after acute stroke during rehabilitation. J Rehabil Med. 2010. 42:21–26.

18. Nakamura R, Moriyama S, Yamada Y, Seki K. Recovery of impaired motor function of the upper extremity after stroke. Tohoku J Exp Med. 1992. 168:11–20.

19. Roy C, Sands M, Hill L. Shoulder pain in acutely admitted hemiplegics. Clin Rehabil. 1994. 8:334.

20. Turner-Stokes L, Jackson D. Shoulder pain after stroke: a review of the evidence base to inform the development of an integrated care pathway. Clin Rehabil. 2002. 16:276–298.

21. Dromerick AW, Edwards DF, Kumar A. Hemiplegic shoulder pain syndrome: frequency and characteristics during inpatient stroke rehabilitation. Arch Phys Med Rehabil. 2008. 89:1589–1593.

22. Chang JJ, Tsau JC, Lin YT. Predictors of shoulder subluxation in stroke patients. Gaoxiong Yi Xue Ke Xue Za Zhi. 1995. 11:250–256.

23. Itoi E, Kuechle DK, Newman SR, Morrey BF, An KN. Stabilising function of the biceps in stable and unstable shoulders. J Bone Joint Surg Br. 1993. 75:546–550.

24. Wallny T, Wagner UA, Prange S, Schmitt O, Reich H. Evaluation of chronic tears of the rotator cuff by ultrasound. A new index. J Bone Joint Surg Br. 1999. 81:675–678.

25. Lee IS, Shin YB, Moon TY, Jeong YJ, Song JW, Kim DH. Sonography of patients with hemiplegic shoulder pain after stroke: correlation with motor recovery stage. AJR Am J Roentgenol. 2009. 192:W40–W44.