middle nasal concha

It is located midway at the anterior edge of the middle nasal concha, directly above the atrium of the middle meatus.

It consists of a thin lamella, which descends from the under surface of the cribriform plate, and ends below in a free, convoluted margin, the middle nasal concha.

Superior to inferior nasal concha are the middle nasal concha and superior nasal concha which arise from the cranial portion of the skull.

The posterior group (sometimes the posterior ethmoid sinus) drains into the superior meatus above the middle nasal concha; sometimes one or more opens into the sphenoidal sinus.

Below, and in front of the superior meatus, is the convex surface of the middle nasal concha; it extends along the whole length of the medial surface of the labyrinth, and its lower margin is free and thick.