Skull 3 Flashcards
Which bone forms the inferior and posterior part of the nasal
vomer
What are the three conchae in the nasal cavity, and which bone are they part of?
Conchae: Superior, Middle, and Inferior nasal conchae.
Bone: Superior and Middle conchae are part of the ethmoid bone, while the Inferior concha is a separate bone.
Which bone forms the anterior cranial fossa, and what structure does it support?
Bone: Ethmoid bone.
Structure: Olfactory bulbs (CN I).
What is the pterion, and why is it clinically significant?
Definition: The junction of the frontal, parietal, temporal, and sphenoid bones.
Clinical Significance: It overlies the middle meningeal artery; trauma here can cause an epidural hematoma.
Which bone forms the hard palate, and what are its two parts?
Bone: Palatine bone (posterior) and Maxilla (anterior).
Parts: Horizontal plate of the palatine bone and palatine process of the maxilla.
What are the three foramina in the sphenoid bone, and which cranial nerves pass through them?
Optic Canal: CN II (Optic nerve).
Superior Orbital Fissure: CN III, IV, V1, and VI.
Foramen Rotundum: CN V2 (Maxillary branch of Trigeminal).
Which bone contains the mastoid process, and what is its clinical significance?
Bone: Temporal bone.
Clinical Significance: It is a site for muscle attachment and contains air cells connected to the middle ear; infections can lead to mastoiditis.
What is the bony orbit, and which seven bones contribute to its structure?
Definition: The bony cavity that houses the eyeball and associated structures.
Bones: Frontal, Zygomatic, Maxillary, Ethmoid, Sphenoid, Lacrimal, and Palatine bones.
Which bone forms the zygomatic arch, and what are its two components?
Bone: Zygomatic bone and Temporal bone.
Components: Temporal process of the zygomatic bone and zygomatic process of the temporal bone.
What is the clinical significance of the cribriform plate of the ethmoid bone?
It supports the olfactory bulb and has perforations for olfactory nerve fibers (CN I).
