Question

Select the INCORRECT statement regarding cerebrum from the following.

• A. Cerebral cortex is made up of grey matter and white matter lies inside it.
• B. Gyri and sulci of cerebral cortex increase surface area of grey matter.
• C. Two lateral ventricles are connected to diocoel by the duct of Sylvius.
• D. Grey matter shows presence of cell bodies, dendrons and non medullated fibres.

Hint:

The duct of Sylvius connects the third and fourth ventricles, not the lateral ventricles to the diocoel.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept
The cerebrum has an outer grey matter cortex, inner white matter and fluid-filled ventricles.

Step 2: Check A, B and D
The cortex is grey matter with white matter inside. Gyri and sulci increase the surface area of grey matter. Grey matter has cell bodies, dendrons and non-medullated fibres. All these are correct.

Step 3: Check C
The two lateral ventricles open into the diocoel (third ventricle) through the foramen of Monro. The duct of Sylvius joins the diocoel to the fourth ventricle.

Final Answer:
Statement C is the incorrect one. \[ \boxed{\text{(C) }\text{Two lateral ventricles are connected to diocoel by the duct of Sylvius.}} \]