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Related Concept Videos

Muscles that Move the Arm01:31

Muscles that Move the Arm

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Nine muscles are involved in arm movements. Two of these, the pectoralis major and latissimus dorsi, originate from the axial skeleton and are called axial muscles. The other seven originate from the scapula and are called the scapular muscles.
The pectoralis major has two origins. Its clavicular head originates on the medial half of the clavicle. In contrast, the sternocostal head originates on the costal cartilages of ribs 1-6, the sternum, and the aponeurosis of the external oblique of the...
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Related Experiment Video

Updated: Dec 29, 2025

Arthroscopic Management of Massive Irreparable Rotator Cuff Tears: Whole Rotator Cable Reconstruction Using Proximal Biceps Tendon Autograft
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Arthroscopic Management of Massive Irreparable Rotator Cuff Tears: Whole Rotator Cable Reconstruction Using Proximal Biceps Tendon Autograft

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Does a Partial Rotator Cuff Tear Affect Pitching Ability? Results From an MRI Study.

Jin-Young Park1, Junhyun Kim1, Jae-Hyung Lee1

  • 1Center for Shoulder, Elbow and Sports at NEON Orthopaedic Clinic, Seoul, Republic of Korea.

Orthopaedic Journal of Sports Medicine
|February 4, 2020
PubMed
Summary
This summary is machine-generated.

Partial rotator cuff tears in professional pitchers do not significantly impact short-term athletic performance. However, indicators like WHIP and IP show a decline two years after the initial damage is identified.

Keywords:
pitcherpitching abilityrotator cuff tear

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Area of Science:

  • Orthopedic Surgery
  • Sports Medicine
  • Baseball Analytics

Background:

  • Limited research exists on the athletic performance impact of non-surgically treated partial rotator cuff tears in pitchers.
  • Previous studies primarily focused on post-surgical outcomes.

Purpose of the Study:

  • To analyze the progression of partial-thickness rotator cuff tears.
  • To evaluate the effect of these tears on the athletic performance of professional baseball pitchers.

Main Methods:

  • A case series study involving 52 professional pitchers with partial-thickness rotator cuff tears.
  • Utilized magnetic resonance imaging (MRI) for tear assessment and tracked performance metrics (ERA, FIP, WHIP, WPCT, IP) over a mean follow-up of 40.8 months.

Main Results:

  • Rotator cuff tears progressed in 75% of patients, with most being low-grade.
  • No significant immediate impact on Earned Run Average (ERA) or Winning Percentage (WPCT).
  • Significant increases in Fielding Independent Pitching (FIP) and Walks Plus Hits divided by Innings Pitched (WHIP), and a significant decrease in Innings Pitched (IP) were observed over time.

Conclusions:

  • Partial rotator cuff tears show minimal short-term influence on overall pitching performance based on standard metrics.
  • Significant declines in WHIP and IP become apparent two years post-diagnosis, indicating a longer-term effect.