Question

5. Which of the following Dural Infoldings/Reflections is NOT matched up correctly with its location?

    A. Falx Cerebri; longitudinally between the two Cerebral Hemispheres

    B. Tentorium Cerebelli; forms a partial roof over the Hypophysial Fossa

    C. Falx Cerebelli; partially separates the Cerebellar Hemispheres

    D. A and B are both not matched up correctly

    E. B and C are both not matched up correctly

6. Which of the following statements regarding the Dural Venous Sinuses is/are true?

    A. Are found between the periosteal and meningeal layers of dura mater in the brain

    B. Receive cerebrospinal fluid (CSF) from the Subarachnoid Space via Arachnoid Granulations (villi) and venous

        blood from the Dural Sinus

     C. Unpaired sinuses are primarily located in the superior portion of the brain, while paired sinuses are primarily   

         located in the inferior portion of the brain

     D. A and B are true regarding the Dural/Venous Sinuses

     E. A and C are true regarding the Dural/Venous Sinuses

7. Which of the following cerebral structures listed below connects the cortex of different parts in same hemisphere?

   A. Communication Fibers

   B. Commissural Fibers

   C. Association Fibers

   D. Purkinje Fibers

   E. Projection Fibers

8. What is the function of Basal Nuclei (Ganglia)?

   A. Relay center for all sensory input into the Cerebral Cortex

   B. Major role in arousal, learning, memory, and motor control

   C. Relay information from Cerebellum to Cerebrum

   D. Controls movement in conjunction with Motor Cortex

   E. Function unclear; integrate information between Cerebral Cortex and Limbic System

9. The Superior Colliculi are part of the Corpus Quadrigemina and play a role in auditory reflexes.

    A. True

   B. False

Answer 1

5)

B. Tentorium Cerebelli; forms a partial roof over the Hypophysial Fossa

• Tentorium Cerebelli is an extension of dura mater that separate cerebellum from the inferior portion of the occipital lobes.
• Brain tumours are often characterized as supratentorial (above the tentorium ) and infratentorial ( below the tentorium).
• Option A and Option C are true statement, hence Option A and C are wrong.
• Option D and E are also wrong because , option A and Option C is correct.

6)

B) Receive cerebrospinal fluid (CSF) from the Subarachnoid Space via Arachnoid Granulations (villi) and venous blood from the Dural Sinus.

• Dural venous sinus get blood from cerebellar vein and recieve CSF from subarachanoid space via arachanoid granulations , and mainly empty into internal jugular vein.
• Option A is wrong because dural venous sinus are found in between endosteal layer and meningeal layer of duramater of brain.
• Option C is a wrong statement , becasue both paired and unpaired sinus are present at both superior and inferior position.
• Option D and E are wrong because option A and C is wrong.

7)

C. Association Fibers

• Association fibers are axons that connect cortical areas within the same cerebral hemisphere.
• The commissural fibers or transverse fibers are axons that connect the two hemispheres of the brain.Hence option B is wrong.
• Projection fibers connect each region to other parts of the brain or to the spinal cord.Hence option E is wrong.
• Purkinjee fibers are located in the heart , hence option D is wrong.
• Option A also wrong , which is not related to above statement.

8)

B. Major role in arousal, learning, memory, and motor control

• The basal ganglia (or basal nuclei) are a group of subcortical nuclei, of varied origin, which are situated at the base of the forebrain and top of the midbrain.
• It control muscle tone and reflex muscular activity.
• All otther options are wrong , because those are not the functions of basal ganglia.

9)

True

• In the brain, the corpora quadrigemina are the four colliculi two inferior, two superior located on the tectum of the dorsal aspect of the midbrain.
• The corpora quadrigemina are reflex centers involving vision and hearing.
• The superior colliculi play an important role in the visual pathway, while the inferior colliculi are important in the auditory pathway