Corpus Callosum MCQs

ANATOMY AIIMS, GROSS ANATOMY, EMBRYOLOGY, NEUROANATOMY, MICROANATOMY, APPLIED/ CLINICAL ANATOMY, CORPUS CALLOSUM 

1. What is the corpus callosum?

   • A. A part of the brain that controls vision
   • B. A white matter tract connecting the two brain hemispheres
   • C. A region responsible for motor coordination
   • D. A structure involved in memory processing
   • Answer: B. 

2. What does the term “corpus callosum” mean in Latin?

   • A. “Brain bridge”
   • B. “Tough body”
   • C. “White matter”
   • D. “Cerebral connection”
   • Answer: B. 

3. How many axonal projections are there between the two hemispheres through the corpus callosum?

   • A. 100 million
   • B. 200 million
   • C. 300 million
   • D. 400 million
   • Answer: B. 

4. Which part of the corpus callosum connects the frontal lobes of the left and right hemispheres?

   • A. Rostrum
   • B. Genu
   • C. Body
   • D. Splenium
   • Answer: A. 

5. What type of connections does the corpus callosum facilitate?

   • A. Homotopic (similar regions) and heterotopic (dissimilar areas)
   • B. Ipsilateral (same side) and contralateral (opposite side)
   • C. Sensory and motor connections
   • D. Temporal and occipital connections
   • Answer: A. 

6. Which part of the corpus callosum tapers away at the posterior section?

   • A. Rostrum
   • B. Genu
   • C. Body
   • D. Splenium
   • Answer: D.

7. What is the primary function of the corpus callosum?

   • A. Memory consolidation
   • B. Depth perception
   • C. Communication between brain hemispheres
   • D. Motor control
   • Answer: C. 

8. Which vascular supply primarily feeds the corpus callosum?

   • A. Middle cerebral artery
   • B. Anterior cerebral artery
   • C. Pericallosal arteries
   • D. Posterior cerebral artery
   • Answer: C

9. What is the approximate length of the corpus callosum?

   • A. 5 cm
   • B. 10 cm
   • C. 15 cm
   • D. 20 cm
   • Answer: B. 

10. Which part of the corpus callosum connects the temporal lobes of the hemispheres?

• A. Rostrum
• B. Genu
• C. Body
• D. Splenium
• Answer: C

11. 11. Which part of the corpus callosum is located anteriorly and connects the frontal lobes?

        • A. Rostrum
        • B. Genu
        • C. Body
        • D. Splenium
        • Answer: B. The genu of the corpus callosum connects the frontal lobes of the left and right hemispheres.

    12. What is the primary type of fibers found in the corpus callosum?

        • A. Projection fibers
        • B. Association fibers
        • C. Commissural fibers
        • D. Arcuate fibers
        • Answer: C. The corpus callosum primarily contains commissural fibers, which connect corresponding areas of the two hemispheres.

    13. Which part of the corpus callosum is involved in connecting the parietal lobes?

        • A. Rostrum
        • B. Genu
        • C. Body
        • D. Splenium
        • Answer: C. The body of the corpus callosum connects the parietal lobes.

    14. What is the function of the splenium in the corpus callosum?

        • A. Motor coordination
        • B. Auditory processing
        • C. Visual integration
        • D. Transfer of visual information
        • Answer: D. The splenium is involved in the transfer of visual information between the two hemispheres.

    15. Which imaging technique is commonly used to visualize the corpus callosum?

        • A. X-ray
        • B. CT scan
        • C. MRI
        • D. PET scan
        • Answer: C. MRI (Magnetic Resonance Imaging) is commonly used to visualize the corpus callosum and other brain structures.

    16. What disorder is associated with agenesis of the corpus callosum?

        • A. Alzheimer’s disease
        • B. Parkinson’s disease
        • C. Schizophrenia
        • D. Agenesis of the corpus callosum (ACC)
        • Answer: D. Agenesis of the corpus callosum (ACC) is a congenital condition where the corpus callosum fails to develop fully or is absent.

    17. Which part of the corpus callosum is most vulnerable to injury due to its thinness?

        • A. Rostrum
        • B. Genu
        • C. Body
        • D. Splenium
        • Answer: A. The rostrum is the thinnest part of the corpus callosum and is susceptible to injury.

    18. What is the role of the corpus callosum in split-brain patients?

        • A. Enhancing memory
        • B. Facilitating language processing
        • C. Preventing seizures
        • D. Separating sensory input
        • Answer: D. In split-brain patients (those who have undergone corpus callosotomy), the corpus callosum is severed to prevent seizures from spreading between hemispheres. This separation leads to distinct sensory input processing in each hemisphere.

    19. Which neurotransmitter is involved in communication across the corpus callosum?

        • A. Acetylcholine
        • B. Dopamine
        • C. Glutamate
        • D. Serotonin
        • Answer: C. Glutamate is the primary neurotransmitter involved in communication between neurons across the corpus callosum.

    20. What is the term for the bundle of fibers connecting the two hemispheres in the absence of the corpus callosum?

    • A. Fornix
    • B. Anterior commissure
    • C. Posterior commissure
    • D. Septum pellucidum
    • Answer: B. In the absence of the corpus callosum, the anterior commissure serves as an alternative pathway for interhemispheric communication.