Head and Neck 7 Flashcards
How many fossa is the floor of the skull divided into?
3
What do grooves and depressions in the skull indicate?
Where, in life, blood vessels and other structures ran
Which bone forms the posterior boundary of the anterior cranial fossas?
Sphenoid
What is A?
Frontal bone
What is B?
Olfactory foramina
What is C?
Optic canal
What is D?
Foramen rotundum
What is E?
Foramen ovale
What is F?
Foramen spinosum
What is G?
Foramen lacerum
What is H?
Internal acoustic meatus
What is I?
Jugular foramen
What is J?
Hypoglossal canal
What is K?
Foramen magnum
What is L?
Occipital bone
What is M?
Parietal bone
What is N?
Posterior cranial fossa
What is O?
Temporal bone (petrous part)
What is P?
Middle cranial fossa
What is Q?
Hypophyseal fossa of sella turcica
What is R?
Greater wing of sphenoid
What is S?
Lesser wing of sphenoid
What is T?
Anterior cranial fossa
What is U?
Crista galli of ethmoid bone
What is V?
Cribiform plate of ethmoid bone
What bone forms the anterior boundary of the middle cranial fossa?
Sphenoid
Which bones form the floor of the middle cranial fossa?
Sphenoid and temporal bone (squamous and petrous parts)
Which bone forms the posterior border of the middle cranial fossa?
Occipital bone
What four bones come together to form the H-shaped pterion?
Frontal
Parietal
Temportal
Sphenoid
What bones form the anterior and posterior borders of the posterior cranial fossa?
Anterior - sphenoid
Posterior - occipital
What structures pass through small foramina of the skull?
Nerves
What structures pass through large foramina of the skull?
Nerves and blood vessels
What foramina is present in the anterior cranial fossa?
Foramina of the cribiform plate
What passes through the foramina of the cribiform plate?
Olfactory nerve
What foramina are present in the middle cranial fossa?
Optic foramen
Superior orbital fissure
Foramen rotundum
Foramen ovale
Foramen spinosum
Foramen lacerum
Carotid canal
What structures pass through the optic foramen?
Optic nerve
Opthalmic artery
What structures pass through the superior orbital fissure?
Superior and inferior divisions of occulomotor nerve
Abducen nerve
Trochlear nerve
Opthalmic division of trigeminal nerve
What structures pass throughj the foramen rotundum?
Maxillary division of trigeminal nerve
What structures pass through the foramen ovale?
Mandibular division of trigeminal nerve(v3)
What structures pass through the foramen spinosum?
Middle meningeal artery
What structures pass through the foramen lacerum?
Internal carotid artery
What structures pass through the carotid canal?
Internal carotid artery
What foramina is present in the posterior cranial fossa?
Internal acoustic foramen
Jugular foramen
Hypoglossal foramen
Foramen magnum
What structures pass through the internal acoustic foramen?
Vestibulotrochlear nerve
Facial nerve
What structures pass through the jugular foramen?
Internal jugular vein/sigmoid sinus
Vagus nerve
Glossopharyngeal nerve
What structures pass through the hypoglossal foramen?
Hypoglossal nerve
What structures pass through the foramen magnum?
Medulla oblongata
Vertebral arteries
Spinal accessory nerves
What is A?
Optic canal
What is B?
Foramen rotundum