outer sheath of optic nerve
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sheath — 1. Any enveloping structure, such as the membranous covering of a muscle, nerve, or blood vessel. Any sheathlike structure. SYN: vagina (1). 2. The prepuce of male animals, especially of the horse. 3. A specially designed tu … Medical dictionary
Optic disc — Interior of posterior half of bulb of left eye. The veins are darker in appearance than the arteries … Wikipedia
Nerve fiber layer — Section of retina. (Stratum opticum labeled at right, second from the top.) … Wikipedia
Outer nuclear layer — Section of retina. (Outer nuclear layer labeled at right, fourth from the bottom.) … Wikipedia
Outer plexiform layer — Section of retina. (Outer plexiform layer labeled at right, sixth from the top.) … Wikipedia
Optic cup (anatomical) — The optic cup is the white, cup like area in the center of the optic disc.[1] The ratio of the size of the optic cup to the optic disc (or cup to disc ratio) is measured to diagnose glaucoma. References ^ Algazi VR, Keltner JL, Johnson CA… … Wikipedia
Vagus nerve — Nerve: Vagus nerve Plan of upper portions of glossopharyngeal, vagus, and accessory nerves. Course … Wikipedia
Vagina — The muscular canal extending from the cervix to the outside of the body. It is usually six to seven inches in length, and its walls are lined with mucus membrane. It includes two vaultlike structures, the anterior (front) vaginal fornix and the… … Medical dictionary
vagina externa nervi optici — [TA] external sheath of optic nerve: the thick outer sheath of the optic nerve, continuous with the dura mater and connecting it with the sclera; called also fibrous or outer sheath of optic nerve and dural sheath … Medical dictionary
Peripheral nerve — This article is about the part of the nervous system. For other uses, see nerve (disambiguation). Nerves (yellow) A peripheral nerve, or simply nerve, is an enclosed, cable like bundle of peripheral axons (the long, slender projections of… … Wikipedia
