1. A reference to the long, thick, sciatic nerve (nervus ischiadicus) which extends from the sacrum down the back of the thigh.
2. Pertaining to, due to, or afflicted with sciatica.
3. Etymology: derived from a Latinized corruption of the Greek ischiadikos, "subject to trouble in the hips or loins"; which was taken from ischion, "the hip joint".

Displacement of the femoral head out of the hip joint, usually accompanied by pain, edema, rigidity, shortening of the leg, and loss of function in which the femoral head lies in the sciatic notch.

Either of two foramina on each side of the pelvis that are formed by the hip bone: "The sacrospinous ligament, and the sacrotuberous ligament which form a passage from the pelvis to the gluteal area (buttock region formed by the gluteal muscles) and the peroneal regions (outer parts of the legs below the knees)."

A protrusion of tissue through the greater sciatic notch.

The sciatic notch consists of either of two notches on the dorsal border of the hipbone on each side that when closed off by ligaments form the corresponding sciatic foramina (opening).

It may be a relatively large notch just above the ischial spine that is converted into the greater sciatic foramen by the sacrospinous ligament called also greatersciatic notch or a smaller notch just below the ischial spine that is converted to the lesser sciatic foramen by the sacrospinous ligament and the sacrotuberous ligament; also called the "lesser sciatic notch".

1. The largest nerve in the body, which begins from nerve roots in the lumbar spinal cord in the low back (sacrum) and extends through the buttock area, sending nerve endings down through the legs and knees.
2. The largest nerve in the body, arising from the sacral plexus on either side, passing from the pelvis through the greater sciatic foramen, and down the back of the thigh, where it divides into the tibial and peroneal nerves.

An inflammation of the sciatic nerve, usually marked by pain and tenderness along the course of the nerve through the thigh and leg.

It may result in a wasting of the muscles of the lower leg over time.

The lateral curvature of the spine caused by an asymmetric spasm of the spinal muscles, often resulting in a list (tilt) to one side.

The posterior femoral cutaneous nerve, a cutaneous nerve supplying the skin of the buttocks, perineum (region of the abdomen surrounding the urogenital and anal openings), popliteal region (area behind the knee joint), and the back of the thigh and the leg.