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MRI > Cranium Anatomy > Flashcards

Cranium Anatomy Flashcards

1
Q

How many bones does the “cranium” have and what are their purpose?

A

there is 8 bones that PROTECT and surround the brain.

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2
Q

What is the spongy bone between the inner and outer layer of bone in the cranium?

A

Diploe

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3
Q

What part of the cranium houses the frontal lobes of the cerebellum and the olfactory bulbs?

A

the anterior cranial fossa (hint hint : FRONTAL lobe)

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4
Q

What is another word for the middle cranial fossa?

A

the temporal fossa

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5
Q

What part of the cranium houses the cerebellum, brainstem, pons, medulla oblongata, midbrain and cranial nerves?

A

the posterior cranial fossa

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6
Q

What part of the brain houses the pituitary gland, hypothalamus and the temporal lobes of the brain, internal carotid artery?

A

The middle cranial fossa

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7
Q

Where is the occipital bone adjacent to?

A

anterior to the cerebellum.

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8
Q

The parietal bones articulate with the frontal, occipital and temporal.

True or False

A

True

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9
Q

How many parietal bones are there in the cranium?

A

2

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10
Q

Where are the parietal bones located?

A

each side of cranium

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11
Q

The frontal bone as a vertical AND horizontal portion.

True or False

A

True

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12
Q

The vertical portion of the frontal bone is called?

A

squamous portion

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13
Q

The vertical portion of the frontal bone forms what facial part?

A

the forehead and frontal sinuses

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14
Q

The glabella is located in which part of the cranium?

A

in the frontal cranium

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15
Q

The supraciliary arches are joined together in the vertical portion of the frontal cranium at what location?

A

glabella

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16
Q

The horizontal plate of the frontal bone forms the roof over each orbital plate

A

True

17
Q

the cribriform plate of the ethmoid bone is joined at the ______ notch?

ethmoid or supraorbital notch

A

ethmoid

18
Q

The passage way of the supraorbital nerve is called the ______ or _____ notch

A

Foramen or supraorbital

19
Q

What is the smallest bone in the cranium?

A

the ethmoid bone

20
Q

the ethmoid bone is located in the posterior cranium fossa.

True or False

A

FALSE its located in the anterior fossa.

21
Q

The ethmoid bone is cube shaped and made up of two masses called labryniths and a vertical/horizontal portion.

True or False

A

TRUE

22
Q

What is the butterfly shaped bone in the cranium called?

A

the sphenoid

has 2 big wings and 2 small wings) :

23
Q

The pituitary gland is located in the sphenoid portion of cranium.

A

True

24
Q

How many temporal lobes are there in the cranium?

A

2

25
Q

The _____ bones form part of the sides and base of cranium.

A

temporal bones

26
Q

How many parts are there to the temporal bone? and what are they

A

4

Squamous, tympanic, mastoid, petrous

27
Q

What part of the ear is responsible for “hearing”

A

the cochlea

28
Q

The cochlea lies in the internal auditory canal

True or false

A

True

29
Q

Explain how the cochlea works in order for us to listen

A

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.

30
Q

Inner ear/bony labyrinth has the vestibule and semicircular canals which control balance and equilibrium

True or False

A

True

31
Q

What is the largest facial bone ?

A

the mandible

32
Q

What is the only movable bone inthe skull?

A

the mandible

33
Q

What is the inferior tip of the mandible called?

A

the chin or “mentum”

34
Q

In pertains to muscles of mastication

Which muscle “keeps your chin up” or raises the mandible?

A

the temporalis muscle

35
Q

In pertains to muscles of mastication

Which muscle is the strongest muscle of the jaw?

A

the masseter

36
Q

In pertains to muscles of mastication

Which muscle “closes your jaw”?

A

The medial pterygoid muscle

37
Q

In pertains to muscles of mastication

Which muscle opens the jaw and allows you to move the mandible from side to side

A

the lateral pterygoid muscle

38
Q

What is the widest portion of the orbits called?

A

the base (located anteriorly)

39
Q

the optic nerve is the nerve of _____.

A

sight

MRI (14 decks)

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