List of internal rotators of the body

From WikiMD's Wellness Encyclopedia

List of Internal Rotators of the Body

The human body comprises various muscles that serve different functions, including movement, stability, and posture. Among these, the internal rotators play a crucial role in rotating parts of the body towards the center line, a movement known as internal or medial rotation. This article provides an overview of the primary internal rotators in the human body, focusing on their anatomical locations and functions.

Internal Rotators of the Shoulder[edit | edit source]

The shoulder joint is one of the most mobile joints in the body, allowing for a wide range of movements, including internal rotation. The primary internal rotators of the shoulder include:

  • Subscapularis Muscle: The subscapularis is part of the rotator cuff, a group of muscles and tendons that provide stability to the shoulder. It is the largest and strongest muscle in the rotator cuff and plays a key role in internal rotation of the arm at the shoulder.
  • Teres Major Muscle: Although not a part of the rotator cuff, the teres major works closely with the latissimus dorsi to internally rotate and adduct the arm.
  • Latissimus Dorsi Muscle: This broad, flat muscle of the back helps in the internal rotation, adduction, and extension of the shoulder joint.
  • Pectoralis Major Muscle: The pectoralis major, particularly its sternal head, contributes to the internal rotation of the humerus.

Internal Rotators of the Hip[edit | edit source]

The hip joint, like the shoulder, is a ball-and-socket joint that allows for a range of movements, including internal rotation. The muscles responsible for this action include:

  • Gluteus Minimus Muscle: The gluteus minimus is one of the smaller gluteal muscles but plays a significant role in stabilizing the hip and assisting with its internal rotation.
  • Tensor Fasciae Latae Muscle: This muscle works alongside the gluteal muscles to stabilize the pelvis on the leg and assists in the internal rotation of the thigh.
  • Adductor Longus Muscle: Part of the adductor group of the thigh, the adductor longus aids in the internal rotation of the hip when the hip is flexed.

Internal Rotators of the Forearm[edit | edit source]

The primary movement of internal rotation in the forearm is referred to as pronation. The muscles involved in this action are:

  • Pronator Teres Muscle: This muscle runs from the humerus to the radius and acts to pronate the forearm, turning the hand so the palm faces downwards.

Conclusion[edit | edit source]

Understanding the internal rotators of the body is essential for comprehending how various movements are performed and for diagnosing and treating related injuries. These muscles work in coordination to allow for complex movements and stability across different joints.

WikiMD
Navigation: Wellness - Encyclopedia - Health topics - Disease Index‏‎ - Drugs - World Directory - Gray's Anatomy - Keto diet - Recipes

Search WikiMD

Ad.Tired of being Overweight? Try W8MD's physician weight loss program.
Semaglutide (Ozempic / Wegovy and Tirzepatide (Mounjaro / Zepbound) available.
Advertise on WikiMD

WikiMD's Wellness Encyclopedia

Let Food Be Thy Medicine
Medicine Thy Food - Hippocrates

Medical Disclaimer: WikiMD is not a substitute for professional medical advice. The information on WikiMD is provided as an information resource only, may be incorrect, outdated or misleading, and is not to be used or relied on for any diagnostic or treatment purposes. Please consult your health care provider before making any healthcare decisions or for guidance about a specific medical condition. WikiMD expressly disclaims responsibility, and shall have no liability, for any damages, loss, injury, or liability whatsoever suffered as a result of your reliance on the information contained in this site. By visiting this site you agree to the foregoing terms and conditions, which may from time to time be changed or supplemented by WikiMD. If you do not agree to the foregoing terms and conditions, you should not enter or use this site. See full disclaimer.
Credits:Most images are courtesy of Wikimedia commons, and templates Wikipedia, licensed under CC BY SA or similar.

Contributors: Prab R. Tumpati, MD