Origin
Ischiopubic ramus, obturator membrane.
Insertion
Femur – greater trochanter.
Blood supply
Inferior gluteal artery.
Nerve supply
L5, S1, S2 nerves.
Action
It helps to rotate the hip joint internally and externally. It also helps to stabilize pelvis to prevent injury during movement.
Disease/Injury
Overstretching of the obturator internus muscle can injure it.
Muscle exercise
To strengthen this muscle, practice ‘wall internal and external hip rotation.’ Lie on the floor with your legs propped up against the wall, keeping a shoulder-width distance between them. The buttocks should be in contact with the wall. Now, rotate your feet away from each other without moving the pelvis. Hold for 3 seconds and then repeat. These are external rotations. For internal rotations, the feet should be rotated towards each other. Hold for 3 seconds and repeat 10 times.
Interesting facts
NA
