Skull Flashcards
What is contained within the Petrous part of the temporal bone?
The inner and middle ear
What is the pterion?
H shaped area where frontal, parietal, greater wing of sphenoid and squamous part of temporal bones meet
Thin and can damage middle meningeal artery if hit
Name the 4 parts of the temporal bone
Squamous part (w/zygomatic process)
Petrous part (w/mastoid process)
Tympanic part
Styloid process
What is contained within the mastoid process?
Mastoid air cells that communicate with the middle ear (only develop in 3rd year of life)
Where is the pituitary gland located?
In the sella turcica (saddle shaped hollow of sphenoid bone)
What does the viscerocranium consist of?
Maxilla and mandible (involved in eating)
What’s the top of the skull called?
The vault
What are the small holes in the vault for?
Transmitting emissary veins
What is the bregma?
Where the coronal suture and saggital suture meet
What’s the lambda?
Where the lambdoid suture and saggital suture meet
What type of joint is the temperomandibular joint?
Atypical synovial with articular disc
Jaw
What movements can occur at the temperomandibular joint?
Depression, elevation, protraction, retraction of the mandible
Also lower jaw side to side
What passes through the incisive fossa?
The nasopalatine nerve (branch of opthalmic- V1)
What’s the crista galli?
Vertical midline projection between the cribiform plate (of the ethmoid bone)
What does the formanen rotundum lead to?
The pterygopalatine fossa
What is contained in the internal acoustic meatus?
Facial nerve (CN VII), vestibulocochlear nerve (CNVIII) and the labyrinthine artery
What are the 3 parts of the sphenoid bone?
Greater wings, lesser wings and body
What divides the nasal cavity into 2 halves?
Vomer bone
What is the hard palate made up from?
Palatine bone and palatine process of the maxilla
What passes through the foramen spinosum?
Middle meningeal vessels
What passes through the greater and lesser palatine foramina?
Palatine nerves (part of maxillary branch of opthalmic of CN V)
What passes through the carotid canals?
Internal carotid artery and sympathetic nerves
Where is the pituitary gland?
In a hollow of the sphenoid called the sella turcica
What part of the brain is found in the middle temporal fossa?
Temporal lobes
Where do the opthalmic arteries originate from?
From the internal carotid arteries
What forms the superior orbital fissure?
Between the lesser and greater wings of the sphenoid bone
Where is the mental foramen?
In the mandible, laterally
What passes through the foramen magnum?
Medulla oblongata, meninges, spinal accessory nerves (CNXI) and 2x vertebral arteries
What passes through the foramen rotundum?
Maxillary branch of trigeminal (CNV)
What is found in the posterior cranial fossa?
The cerebellum, with the tentorum cerebelli roofing it.
Why is the face small at birth compared to the rest of the head?
Teeth are unerrupted, nasal sinuses are undeveloped
Can fit through birth canal
