Overview of Skull and Meninges Flashcards

1
Q

Falx cerebri

A

CT layer that separates the 2 hemispheres

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2
Q

Tentorium cerebelli

A

CT layer that separates the cerebellum from the cortex

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3
Q

What does the external carotid supply?

A

Everything outside the skull

Middle meningeal artery

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4
Q

What does the internal carotid supply?

A

Everything inside the skull

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5
Q

Where do the vertebral arteries branch from?

A

Subclavian arteries

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6
Q

5 layers of the scalp

A
Skin
Connective tissue
Aponeurotic layer
Loose CT
Periosteum
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7
Q

Where are the neurovascular structures found in the scalp?

A

The dense CT layer

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8
Q

Periosteum

A

Last layer of the scalp
Stays attached to the bone
Osteogenic (bone forming)

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9
Q

What is the “danger area”

A

The loose CT layer of the scalp
Where scalping injuries occur
Spread of infection and hemorrhage
The neurovascular structures of the scalp are getting ripped off

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10
Q

The skull bone consists of what 3 parts?

A
Outer table (dense)
Diploe (medullary bone)
Inner table (dense)
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11
Q

What are the 2 layers of the dura?

A

Periosteal layer

Meningeal layer

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12
Q

Where are the venous sinuses found?

A

Between the periosteal and meningeal layers of the dura

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13
Q

Middle meningeal artery

A

Branch of external carotid artery
Found in the bone forming layer of the skull
If you damage it, blood will collect between the dura and bone, resulting in an epidural hematoma

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14
Q

What vessels are ruptured to get a
1. Epidural
2. Subdural
hematoma?

A
  1. Middle meningeal artery

2. Bridging veins

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15
Q

Emissary veins

A

Connect intercranial and extracranial veins
No valves
Infection can spread :(

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16
Q

Where does the innervation of the head switch from trigeminal nerve to cervical nerves?

A

At the vertex (top of the head)