Rectus Abdominus

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Rectus Abdominis mm    Rectus Abdominis: Origin and Insertion

Rectus Abdominus

Origin: Pubic crest and symphysis pubis

Insertion:  Costal cartilages of ribs 5-7; xiphoid processof sternum,

Actions: Flexes vertebral column; compresses abdomen.

Innervation: 7-12 intercostal nerves

Daily uses: Sit ups.


 

 

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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