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Head and Neck > Lecture 5 - Meninges > Flashcards

Lecture 5 - Meninges Flashcards

1
Q

Meningeal layers

A

Dura mater
Arachnoid mater
Pia mater

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2
Q

Dura mater

A 
Tough fibrous
Smooth 
Doesn't dip into sulci and fissure 
Double layer in cranium
Fuses with the periosteum lining the inner table of the vault bones
Single layer in spinal cord
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3
Q

Leptomeninges

A

Pia mater and arachnoid mater

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4
Q

Arachnoid mater

A

Dips into fissures but not sulci
Loose CT
Soft and translucent

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5
Q

Pia mater

A

Thin and delicate
Adherent to the brain
Runs along with sulci and fissure

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6
Q

subarachnoid space

A

Between the arachnoid mater and pia mater

Contains CSF and blood vessels

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7
Q

” layers of dura

A

Periosteal dura

Meningeal dura

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8
Q

Dural venous sinus

A

Separation of the 2 layers of dura filled with venous blood

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9
Q

Dural folds

A

Elongation of the meningeal layer

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10
Q

Falx cerebri

A

Elongation of the meningeal layer of the dura mater
Attached to the crista galli of the cribriform plate
Separates the 2 hemispheres in the longitudinal fissure

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11
Q

Tentorium cerebelli

A

Horizontal and attached to the falx cerebri superiorly

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12
Q

Confluence of sinuses

A

Connects the superior saggital sinus with the inferior saggital sinus

and:
Occipital, transverse and straight sinus

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13
Q

Bridging veins

A

Connect the cerebral veins within the subarachnoid space to the dural venous sinuses by traversing the subdural space

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14
Q

Emissary veins

A

Connect scalp veins with the dural venous sinus by traversing the bone

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15
Q

Types of intracranial haemorrhage

A

Extradural
Subdural
Subarachnoid

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16
Q

Extradural haemorrhage

A

Bleeding between the inner table of bone and the periosteal layer of dura

Lemon shaped
Lucid interval
Fractures pterion damages the middle meningeal artery

17
Q

Subdural haemorrhage

A

Bleeding between the dura mater and the arachnoid mater

Common in elderly due to brain atrophy causing the bridging veins to stretch with increased tension. Increasing the risk of tear

Banana shaped

18
Q

Subarachnoid haemorrhage

A

Between the arachnoid mater and pia mater

Can occur due to ruptured aneurysm or secondary to trauma

Bleed in the circle of Willis

Blood can mix with CSF - sudden often fatal

CT and lumbar puncture if inconclusive

19
Q

Intracerebral haemorrhage

A

Bleeding within brain itself due to:

  • contusions
  • tearing of white matter

Head and Neck (15 decks)

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