Learn all about your latissimus dorsi
Your latissimus dorsi, also known as your "lats," is a large fan-shaped muscle covering much of your back. The name latissimus dorsi is actually latin, meaning "broadest muscle of the back."
The lats attach in a number of places, although there is quite a large variation in the total number of attachment points from individual to individual:
- Spinous processes ("jagged" point of your spine) from the 7th thoracic vertebrae all the way down to your 5th lumbar vertebrae (4 to 8 total vertebrae, based on the individual)
- Iliac crest of your sacrum (based on the individual)
- Inferior angle of your scapula
- Lower 3 or 4 ribs (based on individual)
Despite the large variation in attachment points, all lats insert to the back side (distal portion) of the humerus, just beneath the head of the humerus.
- Torso/spine extension
- Torso/spine lateral flexion
- Arm/Shoulder extension
- Transverse extension/Horizontal abduction
- Flexion from an extended position
- Internal rotation of the shoulder/humerus