This information has been displayed with the kind permission of SportsInjuryClinic and Get Body Smart who can be found at the links below:
Origin: Anterior iliac crest, lateral half of inguinal ligament, and thoracolumbar fascia.
Insertion: Costal cartilages of ribs 8-12; abdominal aponeurosis to linea alba.
Actions: Flexes vertebral column;(draws thorax downwards); rotates vertebral column(torso); laterally flexes vertebral column(torso); compresses abdomen.
Innervation: 8-12 intercostal, iliohypogastric, and ilioinguinal, nerves
Daily uses: Raking leaves.
Insertion: Anterior iliac crest and abdominal aponeurosis to linea alba.
Actions: Flexes vertebral column (draws thorax downward); rotates vertebral column(torso); laterally flexes vertebral column(torso); compresses abdomen.
Innervation: 8-12 intercostal, iliohypogatric and ilioinguinal, nerves.
Daily uses: Touching toes. Reaching up to shelf with some rotation.
Other muscles of the Upper Limb
Origin: Posterior surface of the scapula (below the spine of the scapula) .
Insertion: Greater tuberosity on the humerus .
Actions: Shoulder abduction, External rotation.
Innervation: Suprascapular nerve .
Daily uses: Brushing hair.
Origin: Mid section of the lateral border of the scapula
Insertion: Greater tuberosity on the humerus
Actions:External rotation, Shoulder adduction
Innervation: Axillary nerve
Daily uses: Brushing hair
Origin: Supraspinous fossa
Insertion: Greater tuberosity of the humerus
Actions: Abduction Stabilisation of the humerus
Innervation: Suprascapular nerve
Daily uses: Holding shopping bags away from the body