Ethmoid: What is it? Anatomy, Ossification, Function and Pathologies

, under the frontal bone and anteriorly to the sphenoid bone.

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The ethmoid is a cubic bone, which is characterized by 4 anatomical elements: the cribroso plate, the vertical plate and the two ethmoidal labyrinths.
The ethmoid is an important bone, because: it contributes to the formation of the anterior cranial fossa, constitutes the medial wall of the eye sockets, forms the roof of the nasal cavities and the nasal septum, fixes the nasal cartilage, hooks the cerebral sickle and, finally, through the holes of the cribroso plate, it allows the transit of the nerve fibers of the olfactory nerve (1st cranial nerve).

, known to form the medial wall (or inner wall) of the eye sockets, part of the nasal cavity and part of the nasal septum.
Cubic in shape, the ethmoid is one of the 8 bony elements that make up the so-called neurocranium (or skull); the neurocranium is the upper skeletal complex of the skull, which has the important task of enclosing and protecting the brain.