Axial Muscles - Trunk Muscles Flashcards
Name Origin, Insertion, and Action
Diaphragm
O: Xiphoid Process, Ribs, Lumbar Vertebra
I: Central Tendon
A: Inspiration
Internal Intercostals
O: Rib Below
I: Rib Above
A: Depress Ribs (during exhale)
External Intercostals
O: Rib Above
I: Rib Below
A: Elevate Ribs (during inhale)
Internal Oblique
O: Inguinal Ligament, Iliac Crest, Thoracolumbar Fascia
I: 10th, 11th, 12th Ribs; Abdominals aponeurosis
A: Trunk Flexion, Lateral Flexion, Rotation
External Oblique
O: Lower 8 Ribs Laterally
I: Iliac Crest, Linea Alba
A: Trunk Flexion, Lateral Flexion, Rotation
Rectus Abdominis
O: Pubis
I: Xiphoid Process, Costal Cartilage of Ribs 5-7
A: Trunk Flexion, Compression of Abdomen
Transverse Abdominis
O: Inguinal Ligament, Iliac Crest, Thoracolumbar Fascia, Last 6 Ribs
I: Abdominal Aponeuroses, Linea Alba
A: Compression of Abdomen