What part of ethmoid bone forms superior nasal septum?
perpendicular plate
Within the nasal cavity, the perpendicular plate of the ethmoid bone forms the upper portion of the nasal septum. The ethmoid bone also forms the lateral walls of the upper nasal cavity.
Is the ethmoid bone part of the nasal septum?
The ethmoid bone is an unpaired cranial bone that is a significant component of the upper nasal cavity and the nasal septum. The ethmoid bone also constitutes the medial orbit wall.
What bone forms the nasal septum?
The Septum. The nasal septum is the key midline support structure of the nose and is composed of the quadrilateral cartilage, perpendicular plate of the ethmoid bone, and vomer bone (Figure 6-4).
Does the ethmoid bone contains the Crista Galli?
The crista galli is a thick, midline, smooth triangular process arising from the superior surface of the ethmoid bone, projecting into the anterior cranial fossa. It separates the olfactory bulbs, which lie either side of it in the olfactory fossae of the cribriform plate.
What happens if the ethmoid bone breaks?
Clinical Relevance – Ethmoid Fracture This may cause anosmia (loss of sense of smell). Fracture of the labyrinth – may allow communication between the nasal cavity and the orbit. It is then possible for air to enter the orbit and cause orbital emphysema.
Does a nose have a bone?
Your nose is supported by bone (at the back and bridge) and by cartilage (in the front).
Can you break your ethmoid bone?
The porous fragile nature of the ethmoid bone makes it particularly susceptible to fractures. The ethmoid is usually fractured from an upward force to the nose.
What happens if the cribriform plate of the ethmoid bone is damaged?
Fractures of the cribriform plate can be associated with septal hematoma, olfactory dysfunction, cerebral spinal fluid leak, or infection, which can progress to meningitis.
Where is the infundibulum of the ethmoid bone?
The ethmoid infundibulum is a curved cleft of the ethmoid bone which leads into the anterior portion of the hiatus semilunaris.
The ethmoid bone is an unpaired cranial bone that is a significant component of the upper nasal cavity and the nasal septum. The ethmoid bone also constitutes the medial orbit wall.
What are the three parts of the ethmoid bone?
It contributes to the medial wall of the orbit, the nasal cavity, and the nasal septum. The ethmoid has three parts: cribriform plate, ethmoidal labyrinth, and perpendicular plate.
Where is the hiatus semilunaris and the infundibulum located?
Ethmoidal infundibulum. The hiatus semilunaris is bounded inferiorly by the sharp concave margin of the uncinate process of the ethmoid bone, and leads into a curved channel, the infundibulum, bounded above by the bulla ethmoidalis and below by the lateral surface of the uncinate process of the ethmoid .
