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
Innervation of the scalp anterior to the external ears is through branches of the 3 divisions CN V, trigeminal nerve:
1) V1, ophthalmic 2) V2, maxillary 3) V3, mandibular
26
Posterior to the ear, nerve supply to the scalp is from the?
Cervical spinal nerves
27
What are the 3 layers of meninges surrounding the brain?
1) Dura mater 2) Arachnoid mater 3) Pia mater
28
The dura mater consist of 2 layers what are these layers?
1) Endocranium (endosteum) 2) Meningeal dura
29
what is the INNER layer of the dura mater called?
Meningeal dura
30
What is the outer layer of the dura mater that fuses to the skull called?
Endocranium (also known as the endosteal dura)
31
What are the types of Dural folds?
1) Falx cerebri 2) tentorium cerebelli 3) Falx cerebelli 4) Diaphragma sella
32
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?
Falx cerebri
33
What forms a tent over the cerebellum?
Tentorium cerebelli
34
This is sickle-shaped dural fold inferior to the surface of the tentorium cerebelli -it separates the right and left cerebellar hemispheres
Falx cerebelli
35
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)
Diaphragma Sella
36
What are the two attachment points, anterior and posterior, of the flax cerebri?
The falx cerebri attaches anteriorly to the crista galli and posteriorly to the tentorium cerebelli at the location of the internal occipital protuberance
37
Both the endocranium (endosteal dura) and the meningeal dura adhere to each other except at certain locations where they separate, called?
Dural sinuses
38
What are spaces that contain blood and absorbed cerebrospinal fluid?
Dural sinuses
39
Dura blood supply comes from the?
Middle meningeal artery
40
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
middle meningeal artery
41
Major type of brain herniations
1) Subfalcine/cingulate 2) Transtentorial/ uncal 3) Tonsillar
42
When the 2 layers of dura mater separate this is called?
Sinus
43
What is actually a vein lined with endothelium that is not collapsible?
Sinus
44
The dural sinus drain blood and absorbed CSF from the brain; they all flow toward what?
INTERNAL jugular vein
45
What lies in the median plane on the superior portion of the falx cerebri?
Superior sagittal sinus
46
the superior sagittal sinus connects with the diploic veins, and lateral expansions of the superior sagittal sinus called ?
lateral lacunae
47
What drains posteriorly into the confluence of sinuses (or CONFLUENCE)
Superior sagittal sinus
48
What lies in the median plane but on the inferior portion of the falx cerebri? -it drains posteriorly into the STRAIGHT sinus
Inferior sagittal sinus
49
What is found between the junction of the falx cerebri and the tentorium cerebelli?
straight sinus
50
What receives blood from the inferior sagittal sinus and cerebral veins
straight sinus
51
what drains posteriorly into the confluence?
Straight sinus
52
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
C) inferior sagittal sinus
53
What begins at the confluence and courses LATERALLY?
Transverse sinus
54
What is found within the external border of the tentorium cerebelli?
Transverse sinus
55
What passes anteriorly toward the petrous portion of the temporal bone to the SIGMOID sinus?
Transverse sinus
56
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?
Sigmoid sinus
57
What are found LATERAL to the sella turcica on each side? -they are named this because of there cavelike appearance
two Cavernous sinuses
58
What is a polygonal anastomosis between the right and left internal carotid arteries and the right and left vertebral arteries?
Circle of willis
59
The internal carotid artery, after entering the cranial cavity, will divide into 2 cerebral arteries what are they?
1) anterior cerebral artery 2) middle cerebral artery
60
Which artery courses within the LONGITUDINAL fissure of the cerebrum?
Anterior cerebral artery
61
Which artery courses in the LATERAL fissure of the cerebrum?
Middle cerebral artery
62
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 ____________________________________
1) SUBCLAVIAN 2) Basilar artery 3) Posterior cerebral arteries
63
The circle of willis is formed by:
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
the circle of willis is supplied by which 4 major blood vessels?
1) 2 internal carotid arteries 2) 2 vertebral arteries
65
The posterior cerebral arteries are terminal branches of the basilar artery. the anterior communicating artery is formed by an anastomoses of which blood vessels?
The right and left anterior cerebral arteries, which are branches off the internal carotid artery