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The intervertebral foramen (also called neural foramina, and often abbreviated as IV foramina or IVF), is a foramen between two spinal vertebrae. Cervical, thoracic, and lumbar vertebrae all have intervertebral foramina. The foramina, or openings, are present between every pair of vertebrae in these areas. A number of structures pass through the foramen. These are the root of each spinal nerve, dorsal root ganglion, the spinal artery of the segmental artery, communicating veins between the internal and external plexuses, recurrent meningeal (sinu-vertebral) nerves, and transforaminal ligaments.
Noun. 1. foramen-a natural opening or perforation through a bone or a membranous structure. hiatus. foramen of Monro, interventricular foramen, Monro's foramen-the small opening (on both the right and left sides) that connects the third ventricle in the diencephalon with the lateral ventricle in the cerebral hemisphere. foramen magnum-the large opening at the base of the cranium through which the spinal cord passes. opening, gap-an open or empty space in or between things; there was a small opening between the trees; the explosion made a gap in the wall. 1  Facebook. 2  Twitter.