What does the perpendicular plate articulate with?
The anterior border articulates with the spine of the frontal bone and the crest of the nasal bones. The posterior border articulates by its upper half with the sphenoidal crest, by its lower with the vomer.
What is the perpendicular plate?
Medical Definition of perpendicular plate 1 : a flattened bony lamina of the ethmoid bone that is the largest bony part assisting in forming the nasal septum. 2 : a long thin vertical bony plate forming part of the palatine bone — compare horizontal plate.
Which structures are present on the perpendicular plate of the palatine bone?
The perpendicular plate of the palatine bone makes up a portion of the sidewall of the nasal cavity at the point where it joins the sphenoid bone and pterygoid process (essential for jaw and mouth movement).
What are the surfaces of the perpendicular plate of the palatine bone which is the medial one?
Together, the horizontal plate of palatine bone and the maxilla comprise the hard palate. The posterior border faces the posterior wall of the pharynx. The medial ends of the posterior surfaces of both horizontal plates together form a bony projection in the midline, called the median posterior nasal spine.
Where is the lamina papyracea located?
the ethmoid bone
The lamina papyracea, also known as the orbital lamina of the ethmoid bone, is the principal component of the medial wall of the orbit, and also the lateral surface of the ethmoid air cells.
What is the cribriform plate?
The cribriform plate is a sieve-like partition between the olfactory bulb and nasal passage. The nasal passage is divided in half by the nasal septum and is filled with thinly scrolled conchae (Fig. 11.2).
Where is vomer?
The vomer is a small, thin, plow-shaped, midline bone that occupies and divides the nasal cavity. It articulates inferiorly on the midline with the maxillae and the palatines, superiorly with the sphenoid via its wings, and anterosuperiorly with the ethmoid.
What articulates with the palatine bone?
The human palatine articulates with six bones: the sphenoid, ethmoid, maxilla, inferior nasal concha, vomer and opposite palatine. There are two important foramina in the palatine bones that transmit nerves and blood vessels to this region: the greater and lesser palatine.
What is the difference between the Palatine process and the palatine bone?
In human anatomy of the mouth, the palatine process of maxilla (palatal process), is a thick, horizontal process of the maxilla. It forms the anterior three quarters of the hard palate, the horizontal plate of the palatine bone making up the rest.
Is lamina papyracea part of orbital floor?
The weakest portion of the orbit consists of the thin orbital floor (maxilla) and the lamina papyracea (ethmoid bone) medially and inferiorly.
What does lamina Orbitalis of ethmoid bone form?
The orbital lamina of ethmoid bone, (or lamina papyracea or orbital lamina) is a smooth, oblong bone plate which forms the lateral surface of the labyrinth of the ethmoid bone in the skull.