Ventricles (Task 3) Flashcards

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1
Q

Connection between 3rd and 4th ventricle

A

Cerebral Aquaduct

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2
Q

Connection between lateral ventricles and 3rd ventricle

A

Interventricular foramina

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3
Q

Communications of the 4th ventricle

A

Central canal of spine

Subarachnoid space

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4
Q

Cells which make CSF

A

Ependymal cells in choroid plexus of ventricles

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5
Q

Reabsorption of CSF

A

Enter dural venus sinsuses via arachnoid granulations (aka arachnoid villi) of arachnoid mater

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6
Q

Role of CSF

A
Buoyancy of brain so we can support weight of head
Protection of brain
Prevention of ischaemi
Homeostasis 
Waste clearence
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7
Q

Symptoms of occluded cerebral aqauduct in a neonate

A

Hydrocephalus
Bulging fontanelles
Enlarged head
Gaping cranial sutures

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8
Q

Symptoms of occluded cerebral aqauduct in an adult

A

Hydrocephalus

Raised ICP symptoms

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9
Q

Blood in CSF sample may signify

A

Subarachnoid haemorrhage

Traumatic LP

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10
Q

LP contraindications

A
GCS < 9 
Bradycardia and Hypertension 
Coagulopathy
Shock
Repeated seizures
Focal neurological symptoms 
Papillioedema
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11
Q

Reason for LP contraindication in raised ICP

A

LP causes a low pressure shunt which can pull brain down and cause herniation

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12
Q

Mechanism of a subfalcine herniation

A

Brain tissue pushed under falx cerebri

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13
Q

Mechanism of transtentorial (uncal) herniation

A

Uncas of temporal lobe is squeezed putting pressure on brainstem

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14
Q

Mechanism of a transtentorial (central) herniation

A

Diencephalon and parts of temporal lobe pushed through tentorial notch

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15
Q

Tonsiller herniation

A

Cerebellum pushed through foramen magunum

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