| ischial | <anatomy> Of or pertaining to the ischium or hip; ischiac; ischiadic; ischiatic. <zoology> Ischial callosity, one of the patches of thickened hairless, and often bright-coloured skin, on the buttocks of many apes, as the drill. Source: Websters Dictionary (01 Mar 1998) |
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| ischial bone | 1. <anatomy> The ventral and posterior of the three principal bones composing either half of the pelvis; seat bone; the huckle bone. 2. <zoology> One of the pleurae of insects. Origin: L, Gr. Source: Websters Dictionary (01 Mar 1998) |
| ischial bursa | <anatomy> The bursa between the gluteus maximus muscle and the tuberosity of the ischium. Synonym: bursa ischiadica musculi glutei maximi. (05 Mar 2000) |
| ischial ramus | The branch of the ischial bone, formerly called inferior branch of the ischium; the portion of the bone that passes forward from the ischial tuberosity to join the inferior ramus of the pubic bone, thus forming the ischiopubic ramus. Synonym: ramus ossis ischii. (05 Mar 2000) |
| ischial spine | A pointed process from the posterior border of the ischium on a level with the lower border of the acetabulum; gives attachment to the sacrospinous ligament; the pudendal nerve passes dorsal to the ischial spine, which is palpable per vagina or rectum, and thus is used as a target for the needle-tip in administering a pudendal nerve block. Synonym: spina ischiadica, ischiadic spine, sciatic spine. (05 Mar 2000) |
| ischial tuberosity | The rough bony projection at the junction of the lower end of the body of the ischium and its ramus; this is a weight-bearing point in the sitting position; provides attachment for the sacrotuberous ligament and is the site of origin of the hamstring muscles. Synonym: tuber ischiadicum, tuber of ischium. (05 Mar 2000) |
| ischialgia | 1. Pain in the hip; specifically, the ischium. Synonym: ischiodynia. 2. Rarely used term for sciatica. Synonym: ischioneuralgia. Origin: G. Ischion, hip, + algos, pain (05 Mar 2000) |