| HOME | HELP | CONTACT US | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
Sign In to gain access to subscriptions and/or personal tools.
|
|
|
|||||||
Sign In to gain access to subscriptions and/or personal tools. |
|||||||||
The Steadman-Hawkins Sports Medicine Foundation, Vail, Colorado
The Steadman-Hawkins Sports Medicine Foundation, Vail, Colorado
The Steadman-Hawkins Sports Medicine Foundation, Vail, Colorado
The Steadman-Hawkins Sports Medicine Foundation, Vail, Colorado
The Steadman-Hawkins Sports Medicine Foundation, Vail, Colorado
We used electromyographic analysis to determine the muscle activity of the shoulder muscles during the lift-off test and during resisted internal rotation. The activity in the upper and lower subscapularis muscle during a lift-off test from the region of the midlumbar spine was approximately 70% of maximal voluntary contraction. This level was significantly higher than for all the other muscles tested (P < 0.05). The lift-off test with the hand placed in the region of the midlumbar spine resulted in one-third more electromyographic ac tivity in the subscapularis muscle than when the test was modified and performed with the hand at the but tocks region. A resisted lift-off test resulted in higher activities in all the muscles, but only a small increase in the pectoralis major muscle. The pectoralis major mus cle was significantly more active during resisted inter nal rotation with the arm in front of the body. Compar ison of activity in the upper subscapularis with that in the lower subscapularis muscle showed no significant differences during any of the tests. This study docu ments the importance of the subscapularis muscle dur ing the lift-off test and suggests that other potential internal rotators of the humerus have a limited role in maintaining internal rotation when the arm is placed behind the back.
This article has been cited by other articles:
|
|
 |
|
  S. Namdari, R. F. Henn III, and A. Green Traumatic Anterosuperior Rotator Cuff Tears: The Outcome of Open Surgical Repair J. Bone Joint Surg. Am., September 1, 2008; 90(9): 1906 - 1913. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 E. Itoi, H. Minagawa, N. Yamamoto, N. Seki, and H. Abe Are Pain Location and Physical Examinations Useful in Locating a Tear Site of the Rotator Cuff? Am. J. Sports Med., February 1, 2006; 34(2): 256 - 264. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. J. Decker, J. M. Tokish, H. B. Ellis, M. R. Torry, and R. J. Hawkins Subscapularis Muscle Activity during Selected Rehabilitation Exercises Am. J. Sports Med., January 1, 2003; 31(1): 126 - 134. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T. D. Tennent, W. R. Beach, and J. F. Meyers Clinical Sports Medicine Update. A Review of the Special Tests Associated with Shoulder Examination: Part I: The Rotator Cuff Tests Am. J. Sports Med., January 1, 2003; 31(1): 154 - 160. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
H. RESCH, P. POVACZ, E. RITTER, and W. MATSCHI Transfer of the Pectoralis Major Muscle for the Treatment of Irreparable Rupture of the Subscapularis Tendon J. Bone Joint Surg. Am., March 1, 2000; 82(3): 372 - 82. [Abstract] [Full Text]
|
|
|
|
|
|
M. J. Decker, R. A. Hintermeister, K. J. Faber, and R. J. Hawkins Serratus Anterior Muscle Activity During Selected Rehabilitation Exercises Am. J. Sports Med., November 1, 1999; 27(6): 784 - 791. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | CONTACT US | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
