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Neuro 3 > Lecture 4: Meninges and Ventricles Continued > Flashcards

Lecture 4: Meninges and Ventricles Continued Flashcards

1
Q

What sits underneath the Corpus Callosum?

A

The Lateral Ventricle

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2
Q

What seals the left and right side of the Lateral Ventricle?

A

The Septum Pellucidum

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3
Q

What does the Septum Pellucidum do?

A

It seals off the left and right side of the lateral ventricle

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4
Q

What sits on the floor of the Lateral Ventricle?

A

The choroid plexus

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5
Q

What is the Choroid Plexus?

A

The blood vessel in the Lateral Ventricle that allows the transport of ions, molecules, amino acids, nutrients and water to produce CSF

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6
Q

What structures does the Third Ventricle sit around?

A

The diencephalon which is made of the thalamus and hypothalamus

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7
Q

How does fluid travel through the midbrain?

A

Through the cerebral aqueduct

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8
Q

What sits in the posterior of the cerebral aqueduct?

A

The superior and inferior colliculi

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9
Q

How is CSF made in the fourth ventricle?

A

By more choroid plexus

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10
Q

Where does the Choroid plexus make CSF?

A

•Lateral Ventricles
•Third Ventricle

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11
Q

What are the walls of the fourth ventricle made of?

A

Posteriorly two of the walls are made of the cerebellum and in the front the brainstem

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12
Q

How does CSF get to the subarachnoid space?

A

The Median and Lateral apertures

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13
Q

What is the Cisterna Magna?

A

A space of CSF that is bigger than usual that CSF goes before it reaches the subarachnoid space

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14
Q

What are the functions of CSF?

A

•Supports mass (floats brain)
•Cushions CNS (spatial buffering)
•Contains proper electrolytes for CNS
•Route for chemical messengers

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15
Q

How does CSF leave the subarachnoid space?

A

Through arachnoid granulations

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16
Q

What are the two types of Hydrocephalus?

A

Communicating and noncommunication

17
Q

What is Communicating Hydrocephalus?

A

Hydrocephalus outside the ventricular system. Obstruction occurs at cisterns or arachnoid villi

18
Q

What is Noncommunicating Hydrocephalus?

A

Hydrocephaly within the ventricular system so there is a blockage within the ventricles

19
Q

When does Communicating Hydrocephalus occur?

A

When fluid reabsorption system fails and ventricles begin to enlarge

20
Q

When does Non communicating Hydrocephalus occur?

A

When ventricles become blocked or trapped by obstructions such as a tumour, cyst, or scarring from infection

21
Q

What are the two blood supplies of the brain?

A

•Internal Carotid
•Vertebral-Basilar

22
Q

What can the Internal Carotid be divided into?

A

•Middle Cerebral Artery (MCA)
•Anterior Cerebral Artery (ACA)

23
Q

What can the Vertebral-Basilar artery be divided into?

A

The Posterior Cerebral Artery (PCA)

23
Q

What can the Vertebral-Basilar artery be divided into?

A

The Posterior Cerebral Artery (PCA)

24
Q

What does the External Carotid Artery supply?

A

The face, neck and middle meningeal artery

25
Q

What does the Middle Meningeal Artery arise from?

A

The External Carotid Artery

26
Q

What does the Middle Meningeal Artery arise from?

A

The External Carotid Artery

27
Q

What does the Internal Carotid Artery Supply?

A

The anterior part of the brain

28
Q

What supplies the anterior part of the brain?

A

The Internal Carotid Artery

29
Q

What supplies the posterior part of the brain?

A

The Vertebro-Basilar System

30
Q

What does the Internal Carotid Artery supply?

A

The anterior part of the brain: Frontal, Parietal and temporal lobes

31
Q

What does the Verterbo-basilar system supply?

A

The Posterior part of the brain: Occipital lobe, Cerebellum, Brainstem and upper cord

32
Q

What are the two main suppliers of the Brain?

A

The Internal Carotid Arterial System and the Vertebro-Basilar System

33
Q

What is the Circle of Willis comprised of?

A

•MCS
•Posterior communicating artery
•PCA
•ACA
•Anterior Communicating artery

34
Q

What does the Circle of Willis allow for?

A

Blood can flow between the Internal carotid arterial system and Vertebro-basilar system

Neuro 3 (21 decks)

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