Ventricular System

Question 1

Ventricular system is Continous with the ———— of spinal cord

Answer 1

central canal

Question 2

Ventricles Contains specialised capillaries from —— matter called
the ————

Answer 2

Contains specialised capillaries from pia matter called
the Choroid plexuses

Question 3

Ventricles are filled with the

Answer 3

CSF

Question 4

Choroid plexuses
• Cavity with vascularization - —— cells
• Capillaries of the pia mater or ——— constantly seep cerebrospinal fluid into it. It supplies brain because ———

Answer 4

Choroid plexuses
• Cavity with vascularization - ependyma
• Capillaries of the pia mater or leptomeninx constantly seep cerebrospinal fluid into it. It supplies brain because circulation cannot penetrate the main tissue.

Question 5

Which ventricle is the Largest cavity within the cerebral hemisphere

Answer 5

Lateral ventricles

Question 6

Lateral ventricles
• Body lies medial to ———
• Ant horn is in front of the———
• Post horn is in the ——-
• Inferior horn is in the ——-
• Roof is formed by ———
• Floor is by ——— and ———
• A ——— is where the post, inf and body meets

Answer 6

Largest cavity within the cerebral hemisphere • Body lies medial to caudate nucleus
• Ant horn is in front of the intervent- foramen • Post horn is in the occipital lobe
• Inferior horn is in the temporal lobe
• Roof is formed by corpus callosum
• Floor is by caudate nucleus and thalamus • A trigone — post, inf and body meets

Question 7

Which ventricle is a Narrow slit-like cavity

Answer 7

3rd ventricle

Question 8

THIRD VENTRICLE
• Narrow slit-like cavity
• Lies b/t the two ——
• Floor is by ———
• Roof is by ———
• Connect the lateral vent thru ——— and the fourth vent thru the ———
• Has 4 recesses-

Answer 8

THIRD VENTRICLE
• Narrow slit-like cavity
• Lies b/t the two thalamii in the diencephalon
• Floor is by hypothalamic structures
• Roof is by choroid plexuses
• Connect the lateral vent thru intervent. Foramen and the fourth vent thru the cerebral aqueduct
• Has 4 recesses- suprapineal (roof) infundibular (floor) ,optic (ant) and pineal (post) walls

Question 9

FOURTH VENTRICLE
• ——— shaped cavity in the hind brain
• Roof is by ——— and ———
• Floor is by ——— and ———
• Has 3 recesses : which are
• Has 3 foramina – which are
• Has both ——— and —— plexuses and a ——— fossa

Answer 9

FOURTH VENTRICLE
• Diamond shaped cavity in the hind brain
• Roof is by cerebellum and medullary velum
• Floor is by pons and medulla
• Has 3 recesses – 1 median and 2 lateral
• Has 3 foramina – 1 median (Magendie)
2 lateral (Luschka)
• Has both vertical and horinzontal plexuses and a fossa (Rhomboid fossa)

Question 10

CONTENT OF THE RHOMBOID FOSSA

Answer 10

CONTENT OF THE FOSSA
• Cranial nerve nucleii (5,6 &7)
• Fascial colliculus
• Superior and inferior fovea
• Hypoglossal nucleii and trangle • Vagal nucleii and triangle
• Vestibular nucleii and area
• Obex ( apex of the 4th ventricle)

Question 11

——— formed by the secretory and filtering activity of the choroid plexuses in the ventricles

Answer 11

CSF

Question 12

REABSOPTION OF CSF
• Reabsorption takes place in the ——— space thru the ——— & ——— into the,
a)———- sinus
b)———- sinuses
c)——— around cranial nerves —,—,—
d)——— plexuses around ——— nerves

Answer 12

REABSOPTION OF CSF
• Reabsorption takes place in the subarachnoid space thru the arachnoid villi & granulations into the,
a)Superior sagittal sinus
b)Dural venous sinuses
c)Peripheral lymphatics around C N.2,7 & 8 d)Venous plexuses around spinal nerves

Question 13

COMPOSITION OF CSF
• Similar to ———- composition
• contains:
• contains——-, ——-, ——- & —— (increased)
• contains ———, ——— ion (reduced)
• Total quantity within the ventricles–—-mls
• Total quantity bathing CNS—- —— to ——mls
• Total quantity produced/day —-—— to ——mls

Answer 13

COMPOSITION OF CSF
• Similar to blood plasma composition (clear)
• Proteins, glucose, urea, white blood cells
• Sodium, chloride, magnesium & hydrogen (increased)
• Calcium, potassium ion (reduced)
• Total quantity within the ventricles—20mls
• Total quantity bathing CNS—- 140—200mls
• Total quantity produced/day —–500– 800mls

Question 14

FUNCTION OF THE CSF includes

Answer 14

FUNCTION OF THE CSF
• Protection from mechanical injury
• Nutrition
• Excretory pathway for metabolic waste from nervous tissues
• Route for the spread of neuroactive hormones
• Control of the extracellular fluid of the brain

Question 15

APPLIED ANATOMY

Answer 15

APPLIED ANATOMY
• Lumbar puncture
• Diagnostic values in some diseases
• Hydrochephalus in children
• Increased intracranial pressure in adults • Meningitis – inflamation of the meninges • Papillomas – tumours of choroid plexus

Question 16

APPLIED ANATOMY
• ——— – inflamation of the meninges
• ——— – tumours of choroid plexus

Answer 16

APPLIED ANATOMY
• Meningitis – inflamation of the meninges
• Papillomas – tumours of choroid plexus