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Origin: Outer(external) surface of ilium between the anterior and inferior gluteal lines.
Insertion: Anterior surface of the greater trochanter of the femur
Actions: Abducts thigh at hip. Anterior fibres medially rotate hip.
Innervation: Superior gluteal nerve (L5, S1)
Daily uses:
Other muscles…

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
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