This information has been displayed with the kind permission of Get Body Smart who can be found at the links below:
Humeral Head: Medial epicondyle
Ulnar Head: Coronoid process
Radial Heal: Just inferior to radial tuberosity.
Insertion: Middle phalanx of digits 2-5
Actions: Flexes proximal and middle phalanges (2-5 digit) and flexes wrist.
Innervation: Median nerve (C7, T1)
Daily uses: Picking up a book.
Other muscles …
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
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: Anterior (costal) surface of the scapula
Insertion: Lesser tuberosity of the humerus
Actions: Internal rotation , Adduction
Innervation: Upper and lower subscapular nerves
Daily uses: Tucking the back of your shirt into your trousers