Muscles

Question 1

Name, Origin, Insertion, Action

Answer 1

Name: Rectus Abdominis

Origin (red): Pubic crest and symphysis pubis

Insertion (blue): Costal cartilages of ribs 5-7, xiphoid process of sternum

Action: compresses abdomen, flexes vertebral column

Question 2

Name, Origin, Insertion, Action

Answer 2

Name: External Oblique

Origin (red): external surfaces of ribs 5-12

Insertion (blue): anterior iliac crest and abdominal aponeurosis to linea alba

Action: flexes and rotates vertebral column

Question 3

Name, Origin, Insertion, Action

Answer 3

Name: Internal Oblique

Origin (red): anterior iliac crest, lateral half of inguinal ligament, and thoracolumbar fascia

Insertion (blue): costal cartilages of ribs 8-12, abdominal aponeurosis to linea alba

Action: flexes and rotates vertebral column

Question 4

Name, Origin, Insertion, Action

Answer 4

Name: Transversus Abdominis

Origin (red): anterior iliac crest, lateral half of inguinal ligament, thoracolumbar fascia, and cartilages of ribs 6-12

Insertion (blue): abdominal aponeurosis to linea alba, xiphoid process, and pubic symphysis

Action: compresses abdomen

Question 5

Name, Origin, Insertion, Action

Answer 5

Name: Trapezius

Origin (red): occipital bone, spinous process of C7-T12

Insertion (blue): lateral clavicle, acromion, and spine of scapula

Action: elevates scapula