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1. a narrow slit or cleft, especially one of the deeper or more constant furrows separating the gyri of the brain. 2. a deep cleft in the surface of a tooth, usually due to imperfect fusion of the enamel of the adjoining dental lobes. It can be treated with a dental sealant to decrease risk of caries.
The meaning of FISSURE is a narrow opening or crack of considerable length and depth usually occurring from some breaking or parting. How to use fissure in a sentence.
fissure . An open slit in or between bones. It usually houses nerves and blood vessels. Examples: superior and inferior orbital fissures. foramen (pl. foramina) A hole in a bone through which nerves and blood vessels pass. Examples: foramen magnum; supraorbital foramen; infraorbital foramen; mental foramen. fossa (pl. fossae)
In this way, fissures of the skull are very similar to foramina, in that they are also passageways through bone. They are called fissures simply because they are a different shape of hole, they look more like a crack or cleft, and typically occur between separate anatomical structures.
The jugular foramen is one example through which the inferior petrosal sinus, sigmoid sinus, glossopharyngeal, vagus and accessory nerves pass. Fissures are open slits, grooves or depressions in a bone, often housing nerves and blood vessels. An example is the inferior orbital fissure.
1. a narrow slit or cleft, especially one of the deeper or more constant furrows separating the gyri of the brain. 2. a deep cleft in the surface of a tooth, usually due to imperfect fusion of the enamel of the adjoining dental lobes. It can be treated with a dental sealant to decrease risk of caries.
Definition of Fissure. Fissure: A cleft or groove. A fissure can be normal or abnormal. A fissure in the cerebral cortex is a normal feature. It is a deep fold that involves the entire thickness of the brain wall. A fissure in the anus is abnormal. It is a painful crack in the edge of the anus and is very painful.
A fissure is a crack in the epidermis, often caused by excessively dry skin. Learn to define a fissure, review anal and foot fissures, and explore the signs, symptoms, and treatment of...
1. a long, narrow, deep cleft or crack. 2. a dividing or breaking into parts. 3. Anatomy. a groove between lobes or parts of an organ, as in the brain. 4. Medicine. a break or ulceration where skin and mucous membrane join. anal fissure. verb transitive, verb intransitive Word forms: ˈfissured or ˈfissuring. 5.
from class: Anatomy and Physiology I. Definition. The longitudinal fissure is a deep groove that separates the two hemispheres of the brain in the central nervous system. This fissure divides the human brain into left and right cerebral hemispheres, allowing for specialized functions in each.