ethmoid bone การใช้

• The porous fragile nature of the ethmoid bone makes it particularly susceptible to fractures.
• The instrument would be inserted through a hole punched into the ethmoid bone near the nose.
• The amoeba follows the olfactory nerve fibers through the cribriform plate of the ethmoid bone into the skull.
• This fibrous perpendicular plate of the ethmoid bone as well as between the vomer and the gap between the maxilla and palatine.
• Its name lamina papyracea is an appropriate description, as this part of the ethmoid bone is paper-thin and fractures easily.
• The shape of the nose is determined by the ethmoid bone and the nasal septum, which consists mostly of cartilage and which separates the nostrils.
• From the olfactory mucosa, the nerve ( actually many small nerve fascicles ) travels up through the cribriform plate of the ethmoid bone to reach the surface of the brain.
• The nasal septum is composed of the quadrangular cartilage, the vomer bone ( the perpendicular plate of the ethmoid bone ), aspects of the premaxilla, and the palatine bones.
• At the beginning of the 20th century, Ren?Le Fort mapped typical locations for facial fractures; these are now known as orbital floor, and often involve the ethmoid bone.
• The eight cranial bones are separated by sutures : one frontal bone, two parietal bones, two temporal bones, one occipital bone, one sphenoid bone, and one ethmoid bone.
• It is bounded inferiorly and anteriorly by the sharp concave margin of the uncinate process of the ethmoid bone, superiorly by the ethmoidal bulla, and posteriorly by the inferior nasal concha.
• The first step in this procedure is an uncinectomy ( also known as infundibulotomy ), which is an incision given to the uncinate process of ethmoid bone and removal of the same.
• Olfactory nerves and fibers transmit information about odors from the peripheral olfactory system to the central olfactory system of the brain, which is separated from the epithelium by the cribriform plate of the ethmoid bone.
• The anterior ethmoidal nerve then continues into the cranial cavity at the side of the cribiform plate of the ethmoid bone, sends sensory fibers to the meninges, and then enters the nasal cavity via the nasal slit.
• The internal roof of the nose is composed by the horizontal, perforated cribriform plate ( of the ethmoid bone ) through which pass sensory filaments of the olfactory nerve ( "'Cranial nerve I "'); finally, below and behind ( posteroinferior ) the cribriform plate, sloping down at an angle, is the bony face of the sphenoid sinus.
• The sphenoidal conchae are each developed from a center that makes its appearance about the fifth month; at birth they consist of small triangular laminae, and it is not until the third year that they become hollowed out and coneshaped; about the fourth year they fuse with the labyrinths of the ethmoid bone, and between the ninth and twelfth years they unite with the sphenoid bone.