Question

Which statement is incorrect regarding cerebral cortex?

• A. It shows prominent fields
• B. Large area of cortex neither clearly sensory nor motor
• C. It consists of grey matter
• D. Fibres of tract in cortex are covered with myelin sheath

Answer 1

The correct option is D Fibres of tract in cortex are covered with myelin sheath

The outermost part of the brain is a thick piece of nervous system tissue called the cerebral cortex. It is covered by the meninges and often referred to as grey matter. The cortex is grey because nerve fibres in this area lack the covering with myelin sheath that makes most other parts of the brain appear to be white. It consists of folded bulges.

So the correct option is D.d gyri that create deep furrows or fissures called sulci. The cerebral cortex contains sensory areas and motor areas and a large area of the cortex is neither clearly sensory nor motor.

So the correct option is D