I
- IDIOPATHIC SCOLIOSIS
- Structural lateral curvature of an unknown cause.
- ILIAC BONE
- A part of the pelvic bone that is above the hip joint and from which autogenous bone grafts are frequently obtained.
- ILIAC CREST
- The large, prominent portion of the pelvic bone at the belt line of the body.
- ILIOPSOAS MUSCLE
- Large muscles starting at L-1 and becoming wider as it picks up segments from the lower lumbar spine; combines with the iliacus muscle before attatching to the lesser trochanter of the hip.
- IMMOBILIZATION
- Limitation of motion or fixation of a body part usually to promote healing.
- INFANTILE SCOLIOSIS
- Lateral curvature of the spine that begins before age 3.
- INFRATENTORIAL
- Beneath the tentorium.
- INFUNDIBULUM
- A stalk extending from the base of the brain to the pituitary gland.
- INSTRUMENTATION
- The use of instruments such as metal screws or braces during a surgical procedure to support bone as it heals.
- INTERBODY
- Between the bodies of two adjacent vertebrae
- INTERCOSTALS
- The muscles between the ribs.
- INTERNAL FIXATION
- The immobilization of bone fragments or joints with implants in order to promote healing or fusion.
- INTERSPINOUS LIGAMENT
- Ligament between each of the spinous processes.
- INTERSPINOUS PSEUDARTHROSIS
- Formation of a false joint between two spinous processes.
- INTERVERTEBRAL DISC
- See Disc (Intervertebral).
- INTERVERTEBRAL DISC NARROWING
- Narrowing of the space between any two vertebral bodies.
- INTRA-AORTIC BALLOON COUNTER PULSATION DEVICE
- A pump which is inserted into the main vessel of the body, the aorta, to help the heart deliver blood to critical organs such as the brain or kidneys.
- INTRACEREBELLAR
- Within the cerebellum.
- INTRA-ARTERIAL CATHETERIZATION ANGIOGRAPHY
- An invasive study in which a catheter (a small tube) is placed in the artery and contrast material is injected to which makes the blood vessels visible on an x-ray image. The catheter is inserted in the groin into the femoral artery (the artery to he leg) through a needle, and is guided into the arteries in the neck and head. This study is associated with a very small (less than 0.05 % chance of serious complications) and requires the patient to lie in bed for approximately six hours to allow the leg vessel to heal.
- INTRACEREBRAL
- Within the cerebrum.
- INTRACEREBRAL HEMATOMA
- A blood clot within the brain.
- INTRACRANIAL
- Within the cranium of the skull.
- INTRACRANIAL PRESSURE (ICP)
- The overall pressure inside the skull.
- INTRAOPERATIVE CISTERNOGRAPHY
- Administration of a contrast dye into the ventricles which are chambers in the brain that contain brain fluid.
- INTRAMEDULLARY
- Refers to medullaris, marrow; (1) withing the medulla oblongata of the brain, (2) within the spinal cord, and (3) within the marrow cavity of bone.
- INTRINSIC
- Situated entirely within or pertaining exclusively to a part.
- IN VITRO
- Describing biological phenomena that are made to occur outside the living body traditionally in a test tube. In vitro is Latin for in glass.
- IN VIVO
- Within a living body. In vivo is Latin for in life.
- INFERIOR
- Situated below or directed downward.
- INFORMED CONSENT
- Consent of the patient who has received sufficient information to have surgery, receive medication, or participate in a clinical study.
- INSTITUTIONAL REVIEW BOARD (IRB)
- A committee designated by an institution, such as a hospital, to review and approve research projects; e.g., clinical studies in that institution.
- INVESTIGATIONAL DEVICE EXEMPTION (IDE)
- A FDA regulatory status which permits the human use of an unapproved medical device for the purposes of collecting clinical data under strictly controlled conditions.
- ISCHEMIA
- Inadequate circulation of blood generally due to a blockage of an artery.
- ISOLA
- A posterior fixation device.
- ISOMETRIC
- Of equal dimensions. In physiology, denoting the condition when the ends of a contracting muscle are held fixed so that contraction produces increased tension at a constant overall length.
- ISOTONIC
- Relating to isotonicity or isotonia. Having equal tension; denoting solutions possesing the same osmotic pressure; more specifically, limited to situations in which cells can neither swell nor shrink.
- ISTHMIC
- The lesion is in the pars interarticularis. Three types occur: lytic, fatigue fracture of the pars interarticularis; elongated but intact pars interarticularis; and acute fracture of the pars interarticularis.
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- Published: July 22, 2002
- Updated: March 17, 2008
