Skull Flashcards
Name the paired bones of the cranium
Parietal Temporal Nasal Lacrimal Inferior Nasal Concha
Name the unpaired bones of the cranium
Frontal Sphenoid Occipital Ethmoid Vomer
How many bones in the cranium?
15
How many bones of the face?
7
Name the paired bones of the face
Maxilla
Palatine
Zygomatic
Name the unpaired bones of the face
Mandible
What is diploe?
Inner spongy portion of the flat bones
What are pneumatic bones?
Spongy bone partially replaced by cavities
What are the two types of pneumatic bones?
Paranasal sinuses
Mastoid air cells
In what bones are the paranasal sinuses present?
Maxilla
Ethmoid
Sphenoid
Frontal
What are mastoid air cells?
Air cavities in the mastoid process developing from the middle ear cavity
What are Wormian bones?
Small bits of bones located in some sutures
What’s another name for Wormian bones?
Sutural bones
What are the landmarks/structures that are part of the frontal bone?
Superciliary arches Glabella Supraorbital Foramen (notch) Orbital Process Frontal Sinus Foramen Cecum
What are the landmarks/structures that are part of the parietal bones?
Superior Temporal Line
Inferior Temporal Line
What structures are associated with the landmarks of the parietal bones?
Temporal fascia is attached to the superior temporal line and the temporalis muscle is attached to the inferior temporal line
What are the divisions of the temporal bone?
Squamosal portion
Mastoid portion
Styloid process
Petrous portion
On what portion of the temporal bone would you find the inner ear?
Petrous portion
What is the name of the flat portion of the temporal bone?
Squamosal portion
What are the landmarks/structures of the temporal bone?
Mastoid foramen Stylomastoid foramen Carotid Canal Jugular Canal Foramen lacerum External Acoustic Meatus Internal Acoustic Meatus
Of which bone is the mastoid foramen and what does it transmit?
Temporal bone
Emissary vein
Of which bone is the stylomastoid foramen and what does it transmit?
Temporal bone Facial nerve (CN VII)
Of which bone is the carotid canal and what does it transmit?
Temporal bone
Internal carotid artery
Of which bone is the jugular canal and what does it transmit?
Temporal bone Internal jugular vein Glossopharyngeal nerve Vagus nerve Spinal accessory nerve
Of which bone is the foramen lacerum and what does it transmit?
Temporal bone and generally is filled with cartilage
Of what bone is the external acoustic meatus and what does it transmit?
Temporal bone
Sound waves - opening of the external ear
Of what bone is the internal acoustic meatus and what does it transmit?
Temporal bone
Facial nerve
Vestibulocochlear nerve
What are the landmarks/structures associated with the occipital bone?
Foramen Magnum Occipital condyles External Occipital Protuberance Superior Nuchal Line Inferior Nuchal Line Condylar Canal Hypoglossal Canal Clivus Sulcus for Sigmoid Sinus Internal Occipital Protuberance Sulcus for Transverse Sinus
Of what bone is the foramen magnum associated and what does it transmit?
Occipital Bone
Spinal cord
Spinal Accessory Nerve
Vertebral Artery
Of which bone are the occipital condyles?
Occipital bone
Of which bone is the external occipital protuberance?
Occipital bone
Of which bone is the condylar canal and what does it transmit?
Occipital bone
Emissary vein
Of which bone is the superior nuchal line and what is its approximate location?
Occipital bone
Extends laterally from the EOP
Of which bone is the inferior nuchal line and what is its approximate location?
Occipital bone
Extends laterally from inferior to the EOP about halfway between the EOP and the foramen magnum
Of which bone is the hypoglossal canal and what does it transmit?
Occipital bone Hypoglossal nerve (CN XII)
Of which bone is the clivus; what is its approximate location and function?
Occipital bone
Anterior to the foramen magnum
Provides space for the pons
Of which bone is the sulcus of the sigmoid sinus; what is its approximate location and function?
Occipital bone
Extends from jugular foramen of the temporal bone
Transmits venous blood and allows exit through internal jugular vein
Of which bone is the internal occipital protuberance?
Occipital bone
Of which bone is the sulcus for the transverse sinus; what is its approximate location and function?
Occipital bone
Inner, transverse sulcus approx at the level of the superior nuchal line
The tentorium cerebri attaches to the margins
What are the divisions of the sphenoid?
Body
Greater and Lesser wings
Pterygoid Processes
What are the associated landmarks and structures of the body of the sphenoid?
Sella Turcica
Sphenoid Sinus
Of what bone is the sella turcica; what is its approximation location and its function?
Sphenoid
Body of sphenoid
Houses the pituitary gland
Of what bone is the sphenoid sinus and what is its approximate location?
Sphenoid bone
Located on the body of the sphenoid
What are the associated landmarks and structures of the greater wings of the sphenoid?
Foramen rotundum
Foramen ovale
Foramen spinosum
Of what bone is the foramen rotundum; what is its approximate location and function?
Sphenoid
Greater wings of sphenoid
Transmits maxillary division of the trigeminal nerve
Connects the middle cranial fossa and pterygopalatine fossa
Of what bone is the foramen ovale; what is its approximate location and function?
Sphenoid bone
Greater wings of the sphenoid
Transmits the mandibular division of the trigeminal nerve (and others)
Of what bone is the foramen spinosum; what is its approximate location and function?
Sphenoid
Greater wings of sphenoid
Transmits the middle meningeal artery
What are the associated landmarks and structures of the lesser wings of the sphenoid?
Optic Foramen (canal)
Superior Orbital Fissure
Anterior clinoid process
Chiasmatic groove
Of what bone is the optic foramen (canal); what is its approximate location and function?
Sphenoid
Lesser wings of the sphenoid
Transmits optic nerves and ophthalmic arteries