| IRP | immunoreactive plasma; immunoreactive proinsulin; incus replacement prosthesis; insulin-releasing po... |
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| IRTIS | Integrated Radiation Therapy Information System |
| LASER | light amplification by stimulated emission of radiation |
| LRT | local radiation therapy; long terminal repeat; lower respiratory tract |
| MASER | microwave amplification by stimulated emission of radiation |
| pubic branch of inferior epigastric artery | <anatomy, artery> Branch arising from the inferior epigastric artery medial to the deep inguinal ring; runs medial to femoral ring onto posterior pubis; anastomosis, pubic branch of obturator artery. This anastomosis is frequently large, referred to as an "accessory obturator artery." In 20-30%, this anastomosis replaces the obturator artery, as an "aberrant" or "replaced" obturator artery. Synonym: ramus pubicus arteriae epigastricae inferioris. (05 Mar 2000) |
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| serratus posterior inferior | <anatomy, muscle> Origin, with latissimus dorsi, from spinous processes of two lower thoracic and two upper lumbar vertebrae; insertion, into lower borders of last four ribs; action, draws lower ribs backward and downward; nerve supply, ninth to twelfth intercostal. Synonym: musculus serratus posterior inferior, inferior posterior serratus muscle. (05 Mar 2000) |
| sinus petrosus inferior | A paired dural venous sinus running in the groove on the petrooccipital fissure connecting the cavernous sinus with the superior bulb of the internal jugular vein. Synonym: sinus petrosus inferior, Englisch's sinus. (05 Mar 2000) |
| sinus sagittalis inferior | An unpaired dural venous sinus in the lower margin of the falx cerebri, running parallel to the superior sagittal sinus and merging with the great cerebral vein to form the the straight sinus. Synonym: sinus sagittalis inferior, inferior longitudinal sinus. (05 Mar 2000) |
| skeleton of free inferior limb | The bones of the lower limb except the hip bones, i.e., all lower limb bones including and distal to the femur. (05 Mar 2000) |
| spina iliaca anterior inferior | Spine on the anterior border of the ilium between the anterior superior iliac spine and the acetabulum; site of origin for the direct head of the rectus femoris muscle. Synonym: spina iliaca anterior inferior. (05 Mar 2000) |
| spina iliaca posterior inferior | Spine at the inferior end of the posterior border of the ilium between the posterior superior iliac spine and the greater sciatic notch; it forms the upper margin of the latter. Synonym: spina iliaca posterior inferior. (05 Mar 2000) |
| nervus alveolaris inferior | <anatomy, nerve> One of the terminal branches of the mandibular, it enters the mandibular canal to be distributed to the lower teeth, periosteum, and gingiva of the mandible; a branch, the mental nerve, passes through the mental foramen to supply the skin and mucosa of the lower lip and chin. Synonym: nervus alveolaris inferior, inferior dental nerve. (05 Mar 2000) |
| nervus cardiacus cervicalis inferior | <anatomy, nerve> A nerve passing from the stellate ganglion to the cardiac plexus. Synonym: nervus cardiacus cervicalis inferior. (05 Mar 2000) |
| nervus cutaneus brachii lateralis inferior | <anatomy, nerve> A branch of the radial nerve supplying the skin of the lower lateral aspect of the arm; it frequently is a branch of the posterior antebrachial nerve. Synonym: nervus cutaneus brachii lateralis inferior, lower lateral cutaneous nerve of arm. (05 Mar 2000) |
| nervus gluteus inferior | <anatomy, nerve> Arises from the fifth lumbar and first and second sacral nerves, and supplies the gluteus maximus muscle. It is subject to injury by compression and ischemia in sedentary individuals, resulting in difficulty in rising from a sitting position and difficulty climbing stairs. Synonym: nervus gluteus inferior. (05 Mar 2000) |
| nervus laryngeus inferior | <anatomy, nerve> The terminal branch of the recurrent laryngeal nerve; it supplies the laryngeal mucosa inferior to the vocal folds and all laryngeal muscles except the cricothyroid. Synonym: nervus laryngeus inferior. (05 Mar 2000) |
| norma inferior | External aspect of the base of skull Synonym: norma basilaris, basis cranii externa, norma inferior, norma ventralis. (05 Mar 2000) |
| sulcus frontalis inferior | A sagittal fissure on the lateral convex surface of each frontal lobe of the cerebrum demarcating the middle from the inferior frontal gyrus. Synonym: sulcus frontalis inferior. (05 Mar 2000) |
| sulcus temporalis inferior | The sulcus on the basal aspect of the temporal lobe that separates the fusiform gyrus from the inferior temporal gyrus on its lateral side. Synonym: sulcus temporalis inferior, Clevenger's fissure. (05 Mar 2000) |