Ischial Tuberosity
Ischial Tuberosity : A rounded projection on the ischium. It is a point of attachment for several muscles involved in moving the femur and the knee. It can be affected by improper chair design and by situations involving trauma to the pelvic region. When seated, pressure is borne at the site of the ischial tuberosities. Chair design should provide support to the pressure projection of the ischial tuberosity through the skin of the buttocks