Origin
Common tendinous ring.
Insertion
Anterior part of the sclera – medial surface.
Blood supply
Occulomotor nerve.
Nerve supply
Ophthalmic artery.
Action
It helps to control the movement of eye. It helps to move the eye towards the nose.
Disease/Injury
In medial rectus muscle palsy, the 3rd cranial nerve supplying this muscle gets affected. The eye movement becomes difficult, along with double vision.
Muscle Exercise
To improve the vision, hold the pencil or any object at a distance of one hand from you and try to concentrate on it.
Interesting fact
Due to injury, or sometimes by birth, the muscle is affected, which leads to movement of eye towards the nose, causing squint (esotropia).
