The more medial part of the upper area is for the attachment of the combined origin of the semitendinosus muscle and the long head of the biceps femoris muscle.
The lateral part is for the attachment of the semimembranosus muscle.
The lower area of the ischial tuberosity is oriented horizontally and is divided into medial and lateral regions by a ridge of bone:
The lateral region provides attachment for part of the adductor magnus muscle.