TEST 4 ANATOMY OF SKULL Flashcards
Deals with the bones that surround the brain
Neurocranium
Skull is divided into what two “craniums”
Neurocranium (braincase)
Viscerocranium (face)
Bones that make up the face
Viscerocranium
If Bone has a left side and right Side to it = ______
Paired
If Bone is unpaired, it extends ?
From one side of the skull to the other (typically)
A total of ___ bones make up the skull
22 bones
Frontal bone is PAIRED/UNPAIRED
UNPAIRED
Parietal bone is PAIRED/UNPAIRED.
PAIRED
What are the Parietal bones separated from the frontal bone by?
The Coronal suture
Separates the Left parietal bone from the right parietal bone
Sagittal suture
The occipital bone is PAIRED/UNPAIRED.
Separated from the parietal bones with the ______ suture.
Occipital bone is unpaired
Separated from parietal bones by the lambdoid suture
Temporal bone is PAIRED/UNPAIRED.
PAIRED.
This is an air filled bone that can become infected.
Mastoid process
What type of condition could lead to hearing loss with mastoiditis?
Frequent ear infections
Where the vertebral column, C1, articulates with the skull. (How the skull sits on top of the vertebral column)
Occipital condyle
Separates the temporal bone from the other bones
Squamous suture
What exits through foramina (foramen)
Nerves and blood vessels
Where the upper teeth are inserted
Maxilla
These form the zygomatic arch
Zygomatic process of the temporal bone
Temporal process of the zygomatic bone
Where we hold jaw lift.
Why is this the best place for a jaw lift? (2 reasons)
Angle of the mandible
Opens airway anteriorly
Pain= stimulus for breathing
Attachment point for the tongue and other muscles of the throat and mouth.
Styloid processes
Where sound enters on its way to the ear drum
External acoustic meatus
Forms the roof of the orbit
2
Frontal bone
Sphenoid bone
Makes “butt chin”
Genu
Forms the medial wall of the orbit (3)
Ethmoid bone
Lacrimal bone
Palatine bone
Forms the floor of the orbit
Maxilla
Forms the lateral aspect of the orbit (2)
Zygomatic bone
Sphenoid bone
Very small bone part of the medial wall of the orbit
Palatine bone
Weak point of the orbit
Where zygomatic bone meets the frontal bone
Fossa where the frontal lobes sit
Anterior cranial fossa
These 3 structures make up the ethmoid bone
Crista Galli
Olfactory foramina
Cribriform plate
One of the attachment sites for the dura mater (outer most meningeal membrane) (in the ethmoid bone)
Crista galli
What passes through the olfactory foramina?
Olefactory neurons; cranial nerve I
One of the parts of the skull that is broken a lot in MVAs. Causes CSF to leak out of someone’s nose when this is broken.
Cribriform plate
Has a greater wing and a lesser wing
Sphenoid bone
The optic foramen are located in what wing of the sphenoid bone?
What passes through it?
The lesser wing
Where the ophthalmic arteries and optic pathways pass through
Pituitary gland sits in this structure
Sella turcica
What is one of the first signs/symptoms of a pituitary tumor?
Visual disturbances
Where common carotid passes through to bring blood up to the brain
Carotid canal
Fossa where the temporal lobes sit
Middle cranial fossa
Where the most superior part of the spinal cord becomes/blends in with the brainstem
Foramen magnum
Most superior part of the spinal cord is ____ which blends in with most inferior part of the brainstem, the ______
C1 blends with medulla
Fossa where cerebellum sits
Posterior cranial fossa
Internal jugulars pass through here bringing venous blood (deoxygenated bood) back to the heart
Jugular foramen
Carotid canal:
Bone location?
Structures that pass through?
Temporal bone
Internal carotid
Sympathetic nerve plexus
Jugular Foramen
Bone location?
Structures?
Between temporal and occipital bone
Internal jugular veins (L/R) CN IX (glossopharyngeal) CN X (vagus) CN XI (spinal accessory)
Optic Foramen
Bone location?
Structures that pass through?
Sphenoid bone
CN II (optic) Ophthalmic arteries
Olfactory foramen:
Bone location?
Structures that pass through?
Ethmoid bone CN I (olfactory)
Foramen Magnum:
Bone location?
Structures?
Occipital bone
Spinal cord/inferior medulla oblongata CN XI (spinal accessory) Vertebral arteries