Podcast
Questions and Answers
Which bone is NOT part of the cranium?
Which bone is NOT part of the cranium?
- Sphenoid
- Frontal
- Maxilla (correct)
- Occipital
What is the function of the cribriform plate in the Ethmoid bone?
What is the function of the cribriform plate in the Ethmoid bone?
- Support for the olfactory bulbs (correct)
- Connection to the temporal bone
- Formation of the nasal septum
- Attachment for jaw muscles
Which suture connects the left and right parietal bones?
Which suture connects the left and right parietal bones?
- Squamous suture
- Lambdoid suture
- Coronal suture
- Sagittal suture (correct)
How many foramina connect the infratemporal and pterygopalatine fossae to adjacent cavities?
How many foramina connect the infratemporal and pterygopalatine fossae to adjacent cavities?
Which bone does NOT contribute to the formation of the hard palate?
Which bone does NOT contribute to the formation of the hard palate?
What structure is found in the sphenoid bone?
What structure is found in the sphenoid bone?
Which of the following is NOT a bone of the facial skeleton?
Which of the following is NOT a bone of the facial skeleton?
What is the primary role of the orbit bones?
What is the primary role of the orbit bones?
Which structure unites the frontal bone with the parietal bones?
Which structure unites the frontal bone with the parietal bones?
Which bone is primarily found at the back of the nasal cavity?
Which bone is primarily found at the back of the nasal cavity?
Which cranial fossa is the shallowest and most anterior part of the skull?
Which cranial fossa is the shallowest and most anterior part of the skull?
Where is the hyoid bone located in relation to the mandible?
Where is the hyoid bone located in relation to the mandible?
What shape is the middle cranial fossa described as?
What shape is the middle cranial fossa described as?
Which function does the hyoid bone NOT support?
Which function does the hyoid bone NOT support?
Which cranial fossa accommodates the brain stem and cerebellum?
Which cranial fossa accommodates the brain stem and cerebellum?
What is one of the functions of the anterior cranial fossa?
What is one of the functions of the anterior cranial fossa?
What anatomical feature is characteristic of the hyoid bone?
What anatomical feature is characteristic of the hyoid bone?
Which of the following muscles are associated with the cranial nerves near the palatine?
Which of the following muscles are associated with the cranial nerves near the palatine?
Which structure does NOT lie in the middle cranial fossa?
Which structure does NOT lie in the middle cranial fossa?
Which cranial fossa is considered the deepest?
Which cranial fossa is considered the deepest?
Flashcards
What is the Coronal suture?
What is the Coronal suture?
The frontal bone joins with the two parietal bones.
What is the Sagittal suture?
What is the Sagittal suture?
This suture joins the two parietal bones in the middle of the skull.
What is the Lambdoid suture?
What is the Lambdoid suture?
This suture connects the parietal bones with the occipital bone at the back of the head.
What is the Squamous suture?
What is the Squamous suture?
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What is the Metopic suture?
What is the Metopic suture?
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What is the Lesser wing of the Sphenoid?
What is the Lesser wing of the Sphenoid?
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What are the Pterygoid processes of the Sphenoid?
What are the Pterygoid processes of the Sphenoid?
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What is the Foramen Rotundum?
What is the Foramen Rotundum?
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What is the Foramen Ovale?
What is the Foramen Ovale?
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Within the Ethmoid bone, what is the Cribriform plate?
Within the Ethmoid bone, what is the Cribriform plate?
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Hyoid Bone
Hyoid Bone
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Anterior Cranial Fossa
Anterior Cranial Fossa
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Middle Cranial Fossa
Middle Cranial Fossa
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Posterior Cranial Fossa
Posterior Cranial Fossa
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Oculomotor Nerve
Oculomotor Nerve
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Trigeminal Nerve
Trigeminal Nerve
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Optic Nerve
Optic Nerve
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Cochlear Nerve
Cochlear Nerve
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Frontal Bone
Frontal Bone
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Frontal Lobe
Frontal Lobe
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Study Notes
Cranium Bones and Sutures
- Cranial Bones: Frontal (1), Parietal (2), Temporal (2), Occipital (1), Sphenoid (1), Ethmoid (1)
- Sutures:
- Coronal: Joins frontal and parietal bones
- Sagittal: Joins two parietal bones
- Lambdoid: Joins parietal and occipital bones
- Squamous: Joins temporal and parietal bones
- Metopic (if present): Joins two frontal bones
Sphenoid Bone Features
- Lesser wing
- Pterygoid process
- Pterygoid canal
- Foramen rotundum
- Foramen ovale
Ethmoid Bone Features
- Cribriform plate
- Perpendicular plate
- Ethmoidal labyrinths
- Crista galli
- Orbital plate
- Medial sheet
Infratemporal and Pterygopalatine Fossae
- Location: Below the temporal bone and near the palate
- Structures/ Branches: Maxillary nerve, pterygopalatine ganglion, maxillary artery
- Connections: Orbit, nasal cavity, oral cavity, middle cranial fossa, and infratemporal fossa
- Foramina: 7 foramina for connections
Facial Skeleton Bones
- Vomer (1)
- Conchae (2)
- Nasal bones (2)
- Maxilla (2)
- Mandible (1)
- Palatine bones (2)
- Zygomatic bones (2)
- Lacrimal bones (2)
Palatine Bones
- Location: Posterior nasal cavity
- Composition: Greater and lesser palatine
- Functions: Contributes to the hard palate, lateral nasal walls, maxillary sinuses, and orbital floors
- Articulations: Sphenoid, ethmoid, maxilla, inferior nasal concha, vomer, and opposite palatine
- Foramina: Important foramina for nerves and blood vessels
Orbit Bones
- Function: Enclose the eyeball and associated structures, providing mechanical protection
- Bones: Sphenoid, zygomatic, frontal, ethmoid, lacrimal, maxilla, palatine
- Nerves/ Muscles: Ocular motor, trigeminal, optic, cochlear muscles surround the orbit
Intracranial Fossae
- Anterior Cranial Fossa
- Structure: Shallow, anterior
- Location: Above nasal and orbital cavities
- Function: Accommodates part of the frontal lobe
- Middle Cranial Fossa
- Structure: Butterfly shape
- Location: Central
- Function: Accommodates the pituitary gland and lateral parts for temporal lobes
- Posterior Cranial Fossa
- Structure: Deepest
- Location: Most posterior
- Function: Accommodates brainstem and cerebellum
Hyoid Bone
- Structure: U-shaped, slender bone
- Location: Suspended under the mandible, anterior upper neck
- Functions:
- Aids in tongue movement and swallowing
- Supports the larynx
- Facilitates jaw opening and movement (up, down, forward, backward) through muscle attachments
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