Teres Major Anatomy: Origin, Insertion & Action

⭐ Teres Major Muscle Anatomy ⭐
💪 Origin: Inferior angle of the medial border of the scapula.
💪 Insertion: Medial crest of the intertubercular groove (also known as the bicipital groove).
💪 Action: Internal rotation of the humerus, extension of the shoulder and adduction of the humerus.
💪 Innervation: Lower subscapular nerve (segmental levels C5 and C6)
💪 Artery: Subscapular and circumflex scapular arteries

The teres major muscle is a thick but somewhat flat muscle which connects the humerus to the scapula. It is one of seven scapulohumeral muscles.

Chapters:
0:00 - Intro
0:17 - Teres major location
0:23 - Origin
0:51 - Insertion
1:18 - Teres major surface anatomy
2:06 - Actions overview
2:40 - Muscle action internal rotation
2:56 - Muscle action shoulder extension
3:16 - Muscle action adduction
3:38 - Outro
3:48 - Teres major origin, insertion & action summary image

⭐ If you would like some help memorising this information, be sure to check out the free muscle study flashcards on bodyworksprime.com

⭐ More details about the teres major muscle can be found at: https://bodyworksprime.com/teres-major/

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