External Intercostals
External Intercostals
☆Intercostales externi
MusclePro
Anatomy
- Origin
- Lower margin of upper eleven ribs
- Insertion
- Superior border of rib below (each muscle fiber runs obliquely and inserts toward the costal cartilage)
- Nerve
- Intercostal nerves.
- Actions
- Draw ventral part of ribs upward, increasing the volume of the thoracic cavity for inspiration
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