Cranium Anatomy Flashcards
How many bones does the “cranium” have and what are their purpose?
there is 8 bones that PROTECT and surround the brain.
What is the spongy bone between the inner and outer layer of bone in the cranium?
Diploe
What part of the cranium houses the frontal lobes of the cerebellum and the olfactory bulbs?
the anterior cranial fossa (hint hint : FRONTAL lobe)
What is another word for the middle cranial fossa?
the temporal fossa
What part of the cranium houses the cerebellum, brainstem, pons, medulla oblongata, midbrain and cranial nerves?
the posterior cranial fossa
What part of the brain houses the pituitary gland, hypothalamus and the temporal lobes of the brain, internal carotid artery?
The middle cranial fossa
Where is the occipital bone adjacent to?
anterior to the cerebellum.
The parietal bones articulate with the frontal, occipital and temporal.
True or False
True
How many parietal bones are there in the cranium?
2
Where are the parietal bones located?
each side of cranium
The frontal bone as a vertical AND horizontal portion.
True or False
True
The vertical portion of the frontal bone is called?
squamous portion
The vertical portion of the frontal bone forms what facial part?
the forehead and frontal sinuses
The glabella is located in which part of the cranium?
in the frontal cranium
The supraciliary arches are joined together in the vertical portion of the frontal cranium at what location?
glabella
The horizontal plate of the frontal bone forms the roof over each orbital plate
True
the cribriform plate of the ethmoid bone is joined at the ______ notch?
ethmoid or supraorbital notch
ethmoid
The passage way of the supraorbital nerve is called the ______ or _____ notch
Foramen or supraorbital
What is the smallest bone in the cranium?
the ethmoid bone
the ethmoid bone is located in the posterior cranium fossa.
True or False
FALSE its located in the anterior fossa.
The ethmoid bone is cube shaped and made up of two masses called labryniths and a vertical/horizontal portion.
True or False
TRUE
What is the butterfly shaped bone in the cranium called?
the sphenoid
has 2 big wings and 2 small wings) :
The pituitary gland is located in the sphenoid portion of cranium.
True
How many temporal lobes are there in the cranium?
2
The _____ bones form part of the sides and base of cranium.
temporal bones
How many parts are there to the temporal bone? and what are they
4
Squamous, tympanic, mastoid, petrous
What part of the ear is responsible for “hearing”
the cochlea
The cochlea lies in the internal auditory canal
True or false
True
Explain how the cochlea works in order for us to listen
In the cochlea there is a round window that allows the fluid from the inner ear to move around in order to hear sound waves.
Inner ear/bony labyrinth has the vestibule and semicircular canals which control balance and equilibrium
True or False
True
What is the largest facial bone ?
the mandible
What is the only movable bone inthe skull?
the mandible
What is the inferior tip of the mandible called?
the chin or “mentum”
In pertains to muscles of mastication
Which muscle “keeps your chin up” or raises the mandible?
the temporalis muscle
In pertains to muscles of mastication
Which muscle is the strongest muscle of the jaw?
the masseter
In pertains to muscles of mastication
Which muscle “closes your jaw”?
The medial pterygoid muscle
In pertains to muscles of mastication
Which muscle opens the jaw and allows you to move the mandible from side to side
the lateral pterygoid muscle
What is the widest portion of the orbits called?
the base (located anteriorly)
the optic nerve is the nerve of _____.
sight
