LATISSIMUS

DORSI

• Origin

Thoracolumbar fascia, iliac crest, lower six thoracic vertebrae, lower three or four ribs, and inferior angle of the scapula

• Insertion

Intertubercular groove of the humerus

• Agonist(s)

- Teres major

- Deltoids

• Antagonist(s)

- Pectoralis major

- Biceps

• Function

Extends, adducts, and internally rotates arm

TRIGGER POINT(S)

• Location

Trigger points can be found along the length of the muscle, particularly in the mid-portion and near the lower ribs.

• Pain Referral Pattern

Pain may refer to the lower back, posterior shoulder, and down the back of the arm.

It can cause aching, burning, or sharp pain in the mid to lower back and side of the trunk, and may contribute to discomfort or restricted movement in the shoulder and arm.

• Potential Causes

• Overuse or repetitive activities involving pulling, lifting, or overhead movements.

• Poor posture, especially slouched or rounded shoulders.

• Muscle imbalances between the latissimus dorsi and other back and shoulder muscles.

• Trauma or injury to the mid to lower back or shoulder area.

• Prevention Tips

• Use proper techniques and form during pulling and lifting exercises to avoid overloading the latissimus dorsi.

• Incorporate regular stretching and strengthening exercises for the back and shoulder muscles.

• Ensure proper warm-up and cooldown routines before and after exercise.

• Maintain good posture and ergonomics during daily activities.

• Ensure balanced strength training to avoid muscle imbalances.