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Rad Anaphy > Cerebral Cranium/Cranial Bone > Flashcards

Cerebral Cranium/Cranial Bone Flashcards

1
Q

This single bone forms the
forehead and part of the roof of the
skull.
• It’s smooth part forms the
forehead;
• It’s orbital parts form the roof
of the orbits;
• And nasal parts help to form
the nasal cavities.

A

Frontal bone

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2
Q

Are the ridges forming the upper margins of the circular
openings of the orbits.

A

Supra orbital borders/ supra orbital margin

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3
Q

Is a smooth, rounded bony prominence above
the nose.
It lies between the supra-orbital borders of the
frontal bone.

A

GLABELLA

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4
Q

Are paired cavities in the squamous or
forehead part of the frontal bone, one on each
side. They communicate with the nose and vary in
size and/or maybe absent.

A

Fontal sinuses

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5
Q

Is the middle point of the Fronto-Nasal suture.

A

Nasion

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6
Q

Lies towards the medial end of each supra-orbital border
allowing blood vessels and nerves to pass.

A

Supra orbital notch/supra orbital foramen

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7
Q

Are paired bones, one on each side of the Cerebral
Cranium.

A

Parietal bones

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8
Q

is a bony prominence on the outer surface of each parietal bone
which is the greatest transverse diameter of the skull.

A

Parietal eminence

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9
Q

Is a single bone which forms the posterior part as
well as the part of the base or floor of the cerebral cranium.

A

Occipital bone

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10
Q

Enumerate the 5 parts of frontal bone

A

-Supra orbital borders/supra orbital margin
-glabella
-frontal sinuses
-nasion
-supra orbital notch/supra orbital foramen

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11
Q

Is the flat posterior part of the occipital bone.

A

Squamous part

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12
Q

is an opening in the lower part of the
occipital bone through which the Medulla of the brain leaves the
skull, which is formed entirely by the occipital bone.

A

Foramen Magnum

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13
Q

lie on each side of the
Foramen Magnum.

A

Lateral parts of the occipital bone

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14
Q

– are two oval
prominences on the under surface of the
lateral parts of the foramen magnum
- form the joints with the superior
articular surfaces of the first cervical
vertebra or Atlas.

A

Occipital condyles

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15
Q

part in front of the Foramen
Magnum which unite with the Sphenoid bone in front and
forms part of the floor of the skull.

A

Based of the occipital bone

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16
Q

– is the bony prominence on the outer
surface of the squamous part of the occipital bone which is
readily palpable.

A

External occipital protuberance/innion

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17
Q

Enumerate the parts of occipital bone

A

-squamous part
-foramen magnum
-occipital condyles
-lateral part of the occipital bone
-based of the occipital bone
-external occipital protuberance/innion

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18
Q

Forms part of the lateral walls and base of the skull.

A

Temporal bone

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19
Q

is a slender bony process
that extends forward from the squamous part
to meet a similar process of the Zygomatic bone
forming the “Zygomatic Arch”

A

Zygomatic process

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20
Q

is a large rounded bony
prominence extending down behind the ear.

A

Mastoid process

21
Q

are small cavities in the
mastoid process and adjacent part that
communicate with the middle ear

A

Mastoid air cells

22
Q

Infection in the middle ear may spread into these cells

A

Mastoiditis

23
Q

is shaped like a pyramid that extends from
the ear medially and forward in the base of the skull. Its inner
end is pointed and contains the organ of hearing.

A

Petrous part

24
Q

is a sharp pointed process that extends
down from the base of the petrous part which is seen in
lateral view of the skull outlined behind the mandible. It is an
attachment point for muscles and ligaments of the neck

A

Styloid process

25
Q

– a tube-like passage extending into
the petrous part of the temporal bone.

A

External auditory meatus

26
Q

lies in the middle or inner
part of the petrous, medial to the middle ear

A

Internal auditory meatus

27
Q

lies in the petrous part and is the organ of
hearing.

A

Internal ear

28
Q

a depression on the
temporal bone in front of the EAM.

A

Mandibular/ articular fossa

29
Q

– is an opening medial to the styloid
process through which the internal jugular vein and
cranial nerves IX, X and XI pass.

A

Jugular foramen

30
Q

is an opening medial to the styloid
process through which the internal carotid artery passes into the cranial cavity.

A

Carotid canal

31
Q

is a tiny opening between the mastoid and Styloid
processes through which cranial nerve VII leaves the cranium.

A

Stylomastoid foramen

32
Q

is an opening between the petrous temporal bone and the
sphenoid providing passage for a number of small nerves and for the internal
carotid artery to enter the middle cranial fossa.

A

Foramen lacerum

33
Q

What are the parts of temporal bones?

A

Zygomatic process
Mastoid process
Mastoid air cella
Petrous parts
Styloid process
External auditory meatus
Internal auditory meatus
Internal aer
Mandibular/ articular fossa
Jugular foramen
Carotid canal
Stylomastoid foramen
Foramen lacerum

34
Q

A single bone that help to form a small part of the lateral wall of the skull on
each side as well as part of the base of the skull. It is compared to a Bat with two
pairs of wings extended.

A

Sphenoid bone

35
Q

is the central part that lies in the midline of the floor of the skull, in front
of the occipital bone.

A

Body

36
Q

extended laterally from the body.

A

Wings

37
Q

are two cavities within the body of the bone, one on
each side of the midline that lie behind the nasal fossae and open into
them.

A

Sphenoid sinuses

38
Q

is an opening at the front on each side of the body of the
sphenoid.

A

Optic foramen

39
Q

is a depression
hallowed out on the upper surface of
the body which is shaped like a saddle
wherein the Pituitary gland/
Hypophysis lies in this depression.

A

Sella turcica

40
Q

Is the posterior wall of the
Sella Turcica where it curve upward like the back of a saddle.

A

Dorsum sella

41
Q

are two small rounded
bony processes that extend up and forward from the top
of the
Dorsum Sella.

A

Posterior clinoid processes

42
Q

are two similar processes
that extends back from the lesser wings of the sphenoid
over the Sella Turcica.

A

Anterior clinoid processes

43
Q

WHAT ARE THE PARTS OF THE SPHENOID BONE

A

body
Wings
Pterygoid process/plates
Sphenoid sinuses
Optic foramen
Sella turcica
Dorsum sella
Posterior clinoid processes
Anterior clinoid processes

44
Q

Lies in the anterior part of
the base of the skull between
orbits. Like the Sphenoid bone,
this bone is only partly visible
because of the adjacent bones.

A

Ethmoid bone

45
Q

it fills in a small gap between the orbital parts of the frontal
bone.

A

Cribriform plate

46
Q

is a sharp flat pointed process that extends up from the cribriform
plate in the midline wherein the Falx Cerebri is attached to it.

A

Crista galli

47
Q

is a thin, flat, downward
extension from the cribriform plate that forms a part of
the nasal septum.

A

Perpendicular plate

48
Q

are many small cavities in the labyrinth on each side.

A

Ethmoid sinuses

49
Q

What are the parts of ethmoid bone

A

Cribriform plate
Crista galli
Perpendicular plate
Ethmoid sinuses

Rad Anaphy (4 decks)

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