Internal Intercostal
Internal Intercostal
☆intercostales interni
MusclePro
Anatomy
- Origin
- From the cartilages to the angles of the upper eleven ribs.
- Insertion
- Superior border of the rib below (each muscle fiber runs obliquely and inserts away from the costal cartilage).
- Nerve
- Intercostal nerves
- Actions
- Draw ventral part of ribs downward, decreasing the volume of the thoracic cavity for expiration.
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