This information has been displayed with the kind permission of SportsInjuryClinic and Get Body Smart who can be found at the links below:
Origin: Medial epicondyle of the humerus
Insertion: Base of the 2nd and 3rd metacarpals
Actions: Flexion of the wrist . Radial deviation of the wrist
Innervation: Median nerve
Daily uses: Pulling a rope towards you
Other muscles …
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