Questions and Answers
What is the frontal bone?
The large cranial bone forming the front part of the cranium: the forehead and the upper part of the orbits.
What does the parietal bone form?
It forms the top and sides of the cranium.
What is the function of the temporal bone?
It forms parts of the side of the skull and the floor of the cranial cavity.
What is the mastoid process?
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What does the styloid process resemble?
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Where is the supraorbital foramen located?
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Where does the sagittal suture lie?
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What is the coronal suture?
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What does the lambdoidal suture separate?
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What is the squamosal suture?
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What does the optic foramen transmit?
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What is the external auditory meatus?
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What passes through the jugular foramen?
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What is the mandibular fossa?
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What is the temporomandibular joint (TMJ)?
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What does the occipital bone form?
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What is the foramen magnum?
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What are occipital condyles?
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What is the middle nasal concha?
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What does the crista galli provide?
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What is the cribiform plate?
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What does the maxilla form?
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What does the palatine process form?
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What is the alveolar process?
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What does the lacrimal bone make up?
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What does the lacrimal fossa accommodate?
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What does the nasal bone form?
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What does the palatine bone form?
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What does the inferior nasal concha help with?
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What is the vomer?
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What is the zygomatic bone?
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Study Notes
Cranial Bones
- Frontal Bone: Forms the forehead and upper portion of the orbits.
- Parietal Bone: Two bones located between the frontal and occipital bones, forming the top and sides of the cranium.
- Temporal Bone: Paired bones forming parts of the skull's sides and floor of the cranial cavity.
Processes and Foramina
- Mastoid Process: Projection of the temporal bone located behind the ear.
- Styloid Process: Spike-like projection from the temporal bone on each side of the skull.
- Supraorbital Foramen: Located above the orbit, beneath the forehead, directly under the eyebrow.
Sutures
- Sagital Suture: Mid-line suture between both parietal bones; immovable joint.
- Coronal Suture: Suture separating the frontal bone from the parietal bones.
- Lambdoidal Suture: Suture that separates the parietal bones from the occipital bone.
- Squamosal Suture: Between the parietal and temporal bones, bordered behind by the occipital bone.
Foramina Function
- Optic Foramen: Transmits optic nerve (CN II) and the ophthalmic artery.
- External Auditory Meatus: Passage in the temporal bone leading to the inner ear.
- Jugular Foramen: Passage for cranial nerves IX, X, XI, and several veins.
Joint and Bone Structure
- Mandibular Fossa: Depressions where the mandible meets the cranium.
- Temporomandibular Joint (TMJ): Joint connecting the lower jawbone to the temporal bone.
- Occipital Bone: Saucer-shaped bone at the back of the skull.
- Foramen Magnum: Large opening at the skull's base for spinal cord passage.
Nasal Structure
- Occipital Condyle: Ridges alongside the foramen magnum.
- Middle Nasal Concha: Thin bony plate that separates nasal cavity meatuses.
- Crista Galli: Vertical projection serving as an attachment for the dura mater.
Additional Bones and Features
- Cribiform Plate: Perforated surface allowing passage of olfactory nerves for the sense of smell.
- Maxilla: Forms the upper jaw and part of the hard palate; contains upper teeth.
- Palatine Process: Forms anterior hard palate and contributes to nasal cavity structure.
- Alveolar Process: Ridge forming borders of upper and lower jaws, containing tooth sockets.
- Lacrimal Bone: Small bone forming front inner walls of the eye sockets for lacrimal ducts.
- Nasal Bone: Rectangular bone forming the bridge of the nose.
- Palatine Bone: Forms back of the hard palate and contributes to nasal cavity.
- Inferior Nasal Concha: Located on each side of the nasal septum, increasing air turbulence.
- Vomer: Trapezoidal bone forming the posterior and inferior nasal septum.
- Zygomatic Bone: Forms the prominent cheekbone and lateral part of the eye socket.
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Description
This study guide covers key facial and cranial bones essential for anatomy students. Each card features terms and definitions related to the structure and function of the human skull. Perfect for quick reviews and reinforcing your understanding of cranial anatomy.