Obliques (Internal/External)

 This information has been displayed with the kind permission of  SportsInjuryClinic and Get Body Smart who can be found at the links below:

Internal Obliques 


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.

External Obliques

 

Origin: External surfaces of ribs 5-12

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.

 

 

Muscles

Other muscles of the Upper Limb

Infraspinatus

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.

Teres Minor

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

Supraspinatus

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


More Anatomy

Back to muscles

Ligaments

Check out strengthening exercises for the rotator cuff

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