sciatic (siatik)

and n. [Formerly also sci atick; Pr. sciatic = = Sp . ciático = Pg. It. sciatico , sciatic us, a corrupt form of L. ischiadic us, the back part of the pelvis after pa ing through the great sacrosciatic foramen. Sciatic foramen, Same as sacro sciatic foramen (which see, under sacrosciatic ). - Sciatic hernia, a rare hernia through the sacrosciatic foramen, below the pyriform is muscle. - Sciatic nerves, two divisions of the sacral plexus, the great and the small. The great sciatic, the largest nerve in the body, i ues from pelvis through the great sciatic foramen, and descends vertically behind the thigh to about the middle, where it divides into the internal popliteal and the peroneal. It gives branches to the hip-joint and to the muscles of the post femoral group. The small sciatic arises by two roots from the second and third sacral nerves, and receives also a descending branch of the inferior gluteal nerve. This is a posterior cutaneous nerve, which i ues with the great sciatic, and is distributed to the buttock, perineum, back of the thigh, and upper and back part of the leg.Sciatic notch. See notch, and cut under in nomina tum. Sciatic region, the region of the hip. Sciatic spine, the spine of the ischium. Sciatic veins, the venæ comites of the sciatic arteries, emptying into the internal iliac vein. II. n. 1. A sciatic part or organ; especially, a sciatic nerve.-2. pl . Sciatica. Rack'd with sciatics , martyr'd with the stone. Pope , Imit. of Hor., L. vi. 54.