Table of Contents
Summary
- Origins
- Posterior surface of inferior angle of 🦴 scapula
- Lower one third of lateral border of 🦴 scapula
- Blends with the deep surface of latissimus dorsi via the thoracolumbar fascia
- Lower one third of lateral border of 🦴 scapula
- Insertions
- Medial lip of intertubercular (bicipital) sulcus of 🦴 humerus
- Actions
- Extends the shoulder
- Adducts the shoulder
- Medially rotates the shoulder
- Adducts the shoulder
Illustrations
Relative Positions of Teres Major and Minor Insertions
💪 Teres major attaches just behind and above on the greater tubercle, while 💪 teres minor grips the front of the 🦴 humerus along the medial edge of the 📍 bicipital groove.
Etymology
The term “teres major” refers to a muscle in the upper limb, specifically located in the shoulder area. The etymology of “teres major” comes from Latin:
- “Teres” means “round” or “smooth,” indicating the shape of the muscle.
- “Major” means “greater” or “larger,” distinguishing it from the “teres minor” muscle, which is smaller and has a different function.
So, “teres major” essentially translates to “the larger round muscle.” This muscle is involved in the movement of the shoulder and the upper arm, specifically aiding in actions such as internal rotation, adduction, and extension of the humerus.
References
- Wikipedia
- đź’Ş Teres Minor
- 📕 Gf, 162–63