chapter 5 Flashcards

1
Q

the scalp consist of 5 layers that cover the

A

calvaria

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2
Q

The first 3 layers of the scalp are collectively called the ___________ and are clinically regarded as a single layer because they remain together when cut during surgery or torn off during an accident

A

Scalp proper

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3
Q

Which layer of skin of the scalp commonly found containing hair and SUBACEOUS glands

A

Layer1 (skin)

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4
Q

Which layer of the scalp has close subcutaneous tissue (connective tissue) that is richly VASCULARIZED and well supplied with nerves

A

Layer 2 (close subcutaneous tissue)

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5
Q

Which layer of the scalp is aponeurosis is a flattened tendon?

A

Layer 3 (aponeurotica)

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6
Q

What layer of the scalp is found between the frontalis muscle anteriorly and the OCCIPITALIS muscle posteriorly and is also referred to as the EPICRANIUM?

A

layer 3 (aponeurotica)

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7
Q

Which layer of the scalp is has loose subaponeutotic tissue which allows free movement of the scalp proper?

A

Layer 4
-remember scalp proper is layers 1-3

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8
Q

Which layer of the scalp has loose connective tissue that allows free movement also contains many potential spaces with fluid and allowing pus or blood to spread easily through here?

A

layer 4 (loose subaponeurotic tissue)

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9
Q

The veins (emissary vein) connect this layer with the dural sinus and can potentially lead to spread of infection from this layer to the cranial cavity? Which layer is this?

A

Layer 4 (loose subaponeurotic tissue)

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10
Q

This layer is also known as the DANGER Layer of the scalp?

A

Layer 4 (loose subaponeurotic tissue)

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11
Q

This layer of the scalp is the deepest, and is firmly anchored to the skull?

A

layer 5 (pericranium)

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12
Q

S
C
A
L
P

A

Skin
Close subcutaneous tissue
Aponeurosis
Loose subaponeurotic tissue
Pericranium

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13
Q

What is the name of the blood vessels that connect the danger layer of the scalp to the dural sinus?

A

The emissary veins

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14
Q

Which is the danger layer?

A

Layer 4

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15
Q

The cranial bone is made up of __ layers that can be seen when looking at the skull.

A

3

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16
Q

Cranial Bone: On the external surface of the outer table is ________________________________ which is the 5th layer of the scalp

A

Periosteum and pericranium

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17
Q

Cranial Bone: The external layer is called the ________________ and is made of compact bone

A

outer table

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18
Q

Cranial Bone: The middle layer is made of __________________ bone and is called DIPLOE

A

Spongy bone

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19
Q

Cranial Bone: The internal layer is called the ____________________ and is made of compact bone

A

inner table

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20
Q

Different cranial bones vary in thickness; the occipital and frontal regions are _____________, and the temporal region is __________________

A

Thick
thinner

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21
Q

Blood supply to the scalp comes from vessels below, specifically the branches off the ?

A

External carotid and internal carotid

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22
Q

Branches off the INTERNAL CAROTID ARTERIES supply the?

A

Frontal region

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23
Q

Branches supplying the temporal and occipital regions come off the?

A

External carotid

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24
Q

Blood supply of the scalp: Veins accompany the arteries in the __________________________ arrangement (in which 2 veins lie on either side of the artery) and have the same names as the arteries

A

Venae comitantes

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25
Q

Innervation of the scalp anterior to the external ears is through branches of the 3 divisions CN V, trigeminal nerve:

A

1) V1, ophthalmic
2) V2, maxillary
3) V3, mandibular

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26
Q

Posterior to the ear, nerve supply to the scalp is from the?

A

Cervical spinal nerves

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27
Q

What are the 3 layers of meninges surrounding the brain?

A

1) Dura mater
2) Arachnoid mater
3) Pia mater

28
Q

The dura mater consist of 2 layers what are these layers?

A

1) Endocranium (endosteum)
2) Meningeal dura

29
Q

what is the INNER layer of the dura mater called?

A

Meningeal dura

30
Q

What is the outer layer of the dura mater that fuses to the skull called?

A

Endocranium (also known as the endosteal dura)

31
Q

What are the types of Dural folds?

A

1) Falx cerebri
2) tentorium cerebelli
3) Falx cerebelli
4) Diaphragma sella

32
Q

This separates the superior portion of the right and left sides of cerebrum and it attaches anteriorly to the crista galli and posteriorly to the tentorium cerebelli at the level of the INTERNAL OCCIPITAL protuberance. what is this?

A

Falx cerebri

33
Q

What forms a tent over the cerebellum?

A

Tentorium cerebelli

34
Q

This is sickle-shaped dural fold inferior to the surface of the tentorium cerebelli
-it separates the right and left cerebellar hemispheres

A

Falx cerebelli

35
Q

This is a small, circular, horizontal sheet of dura that forms a roof over the HYPOPHYSEAL fossa in the sella turcica
-it is pierced by the HYPOPHYSEAL STALK (infundibulum)

A

Diaphragma Sella

36
Q

What are the two attachment points, anterior and posterior, of the flax cerebri?

A

The falx cerebri attaches anteriorly to the crista galli and posteriorly to the tentorium cerebelli at the location of the internal occipital protuberance

37
Q

Both the endocranium (endosteal dura) and the meningeal dura adhere to each other except at certain locations where they separate, called?

A

Dural sinuses

38
Q

What are spaces that contain blood and absorbed cerebrospinal fluid?

A

Dural sinuses

39
Q

Dura blood supply comes from the?

A

Middle meningeal artery

40
Q

What branches off the maxillary artery coming oof the external carotid and courses external to the dura mater
-the inner surface of the calvaria contains indentations vessels

A

middle meningeal artery

41
Q

Major type of brain herniations

A

1) Subfalcine/cingulate
2) Transtentorial/ uncal
3) Tonsillar

42
Q

When the 2 layers of dura mater separate this is called?

A

Sinus

43
Q

What is actually a vein lined with endothelium that is not collapsible?

A

Sinus

44
Q

The dural sinus drain blood and absorbed CSF from the brain; they all flow toward what?

A

INTERNAL jugular vein

45
Q

What lies in the median plane on the superior portion of the falx cerebri?

A

Superior sagittal sinus

46
Q

the superior sagittal sinus connects with the diploic veins, and lateral expansions of the superior sagittal sinus called ?

A

lateral lacunae

47
Q

What drains posteriorly into the confluence of sinuses (or CONFLUENCE)

A

Superior sagittal sinus

48
Q

What lies in the median plane but on the inferior portion of the falx cerebri?
-it drains posteriorly into the STRAIGHT sinus

A

Inferior sagittal sinus

49
Q

What is found between the junction of the falx cerebri and the tentorium cerebelli?

A

straight sinus

50
Q

What receives blood from the inferior sagittal sinus and cerebral veins

A

straight sinus

51
Q

what drains posteriorly into the confluence?

A

Straight sinus

52
Q

The superior sagittal sinus directly connects with each of the following except?
a) Diploic vein
b) Lateral lacunae
c) Inferior sagittal sinus
d) Cerebral veins

A

C) inferior sagittal sinus

53
Q

What begins at the confluence and courses LATERALLY?

A

Transverse sinus

54
Q

What is found within the external border of the tentorium cerebelli?

A

Transverse sinus

55
Q

What passes anteriorly toward the petrous portion of the temporal bone to the SIGMOID sinus?

A

Transverse sinus

56
Q

What extends from the transverse sinus and courses in an S-shape along the petrous portion of the temporal bone to the jugular foramen, where it continues in the neck as the INTERNAL, jugular vein?

A

Sigmoid sinus

57
Q

What are found LATERAL to the sella turcica on each side?
-they are named this because of there cavelike appearance

A

two Cavernous sinuses

58
Q

What is a polygonal anastomosis between the right and left internal carotid arteries and the right and left vertebral arteries?

A

Circle of willis

59
Q

The internal carotid artery, after entering the cranial cavity, will divide into 2 cerebral arteries what are they?

A

1) anterior cerebral artery
2) middle cerebral artery

60
Q

Which artery courses within the LONGITUDINAL fissure of the cerebrum?

A

Anterior cerebral artery

61
Q

Which artery courses in the LATERAL fissure of the cerebrum?

A

Middle cerebral artery

62
Q

The vertebral artery branches off of the ________________ artery and travels upward through the foramina in the transverse processes of the cervical vertebrae
It passes through the foramen magnum and joins the vertebral artery from the opposite side to form the ___________________
This vessel courses along a groove on the PONS and divides into the two ____________________________________

A

1) SUBCLAVIAN
2) Basilar artery
3) Posterior cerebral arteries

63
Q

The circle of willis is formed by:

A

1) Basilar arteries
2) 2 posterior cerebral arteries
3) 2 posterior communicating arteries
4) 2 internal carotid arteries
5) 2 anterior cerebral arteries
6) 1 anterior communicating artery

64
Q

the circle of willis is supplied by which 4 major blood vessels?

A

1) 2 internal carotid arteries
2) 2 vertebral arteries

65
Q

The posterior cerebral arteries are terminal branches of the basilar artery. the anterior communicating artery is formed by an anastomoses of which blood vessels?

A

The right and left anterior cerebral arteries, which are branches off the internal carotid artery