✅Meninges, Ventricles And Blood Supply

Question 1

What are meninges?

Answer 1

Noneural tissue that surround the central nervous system

Question 2

What does meninges act as?

Answer 2

Protective housing

Question 3

What are examples of meninges?

Answer 3

Dura mater
Arachnoid
Pia mater

Question 4

How many layers are the dura mater?

Answer 4

2

Question 5

What are the two layers of the dura mater?

Answer 5

Periosteal layer

Meningeal layer

Question 6

What does the dura mater do?

Answer 6

Holds in the CSF

Protects the CNS

Question 7

What is the arachnoid mater?

Answer 7

Thin membrane underside of dura mater

Sub arachnoid chamber ( find fluid within)

Question 8

What is the pia mater?

Answer 8

Extremely thin membrane

Question 9

Where is the pia mater?

Answer 9

Close to cerebral cortex

Question 10

What does the subarachnoid chamber contain?

Answer 10

CSF

Question 11

What is CSF?

Answer 11

Cerebrospinal Fluid

Question 12

What is the progress of CSF?

Answer 12

Fluid is produced, circulated and delivered back via Ventricles

Question 13

What is the lateral ventricle?

Answer 13

a C-shaped chamber

Question 14

Where is the lateral ventricle located?

Answer 14

In all 4 lobes

Around caudate nucleus

Question 15

Where is the third ventricle found?

Answer 15

Connected to lateral ventricle, narrows into third ventricle

Sits between 2 thalami

Question 16

What is the progression of Cerebral aqueduct and the 4th ventricle?

Answer 16

3rd ventricle (top of midbrain) cavity narrows= cerebral aqueduct

Opens in pons/medulla as 4th ventricle

4th supplies CSF to spinal cord and subarachnoid space.

Question 17

What is the aorta?

Answer 17

Largest artery in body

Question 18

What does the internal carotid Artery (IC) supply?

Answer 18

The brain

Question 19

What does the External Cartoid Artery supply blood to?

Answer 19

Pharynx, tongue, face and eyes

Question 20

What does the middle cerebral artery supply to? (MCA)

Answer 20

Speech, language and hearing

Question 21

What does the Anterior Cerebral Artery (ACA) supply to?

Answer 21

Frontal, parietal, corpus callosum, basal ganglia

Question 22

What does the subclavian artery vertebral artery (VA)

Answer 22

Basilar Artery

Question 23

What does the Basilar artery (BA) and Posterior Cerebral Artery (PCA) supply to?

Answer 23

Occipital lobe, thalamus and corpus callosum

Question 24

What is the circle of willis?

Answer 24

2 routes to the brain (Internal Carotid & Vertebral artery) connect and other major arteries arise

Question 25

Where are the anterior cerebral arteries connecting to?

Answer 25

Frontal and parietal lobes

Question 26

Where are the posterior cerebral arteries connecting to?

Answer 26

Occipital and temporal lobes

Question 27

Where does the middle cerebral artery connect?

Answer 27

Frontal, parietal and temporal lobes

Question 28

What is affect if there is damage to the MCA?

Answer 28

Broca’s area, primary auditory cortex, most of primary motor and somatosensory cortex, Wernicke’s area, angular and supramarginal gyri, arcuate fasciculus

Question 29

What happens if there is a infarct at junction between internal carotid artery (ICA) and MCA

Answer 29

interrupts blood flow to all speech & language areas

Question 30

What may deeper infarcts further into cerebral hemisphere do?

Answer 30

produce more localized deficits of blood supply

Question 31

What is the foetal neural development?

Answer 31

▹ Embryo (gestational week 8 onwards)
▸Major compartments of CNS & PNS are defined
▸Rapid growth of cortical and subcortical structures

Question 32

When does foetal development begin?

Answer 32

▸Neuron production begins 42 days post conception

Question 33

What is the neural development of a pre-school child?

Answer 33

▸Brain increases four-fold
▸90% adult volume by age 6
▸Structural changes (of grey & white matter) continue through childhood and adolescence