Abdominals

Question 1

Obliquus abdominis externus

Answer 1

O: Lateral surface of ribs 4-18; thoracolumbar fascia
I: Abdominal tendon; Linea alba + Prepubic tendon; Pelvic tendon; Tuber coxae; Inguinal ligament
F: Compresses abdominal viscera as in defecation + expiration etc., Flexes trunk
N: Local intercostal + Ventral brr. of lumbar nn.

Question 2

Obliquus abdominis internus

Answer 2

O: Tuber coxae + Adjacent inguinal ligament
I: Last rib; Cartilages of last five ribs; Linea alba + Prepubic tendon
F: Compresses abdominal viscera as in defecation + expiration etc., Flexes trunk
N: Local intercostal + Ventral brr. of Lumbar nn.

Question 3

Transversus abdominis

Answer 3

O: Medial surface of costal cartilages 7-18; Lumbar TPs
I: Linea alba
F: Compresses abdominal viscera as in defecation + expiration etc., Flexes trunk
N: Local intercostal + Ventral brr. of Lumbar nn.

Question 4

Rectus abdominis

Answer 4

O: Lateral surface of costal cartilages 4-9
I: Prepubic tendon + Via accessory ligament on head of femur
F: Flexes lumbar spine + Lumbosacral joint, Compresses abdominal viscera, Flexes trunk
N: Local intercostal + Ventral brr. of Lumbar nn.