Question

Crura cerebri consist of

• A. Longitudinal bands of nerve fibres
• B. Transverse bands of nerve fibres
• C. Oblique bands of nerve fibres
• D. Bands of nerve fibres that cross each other

Answer 1

Answer: (A)

Longitudinal bands of nerve fibres

The midbrain is a small and contracted region of the brain. The anterior region of the midbrain is made up of two longitudinal bands of myelinated nerve fibres called the cerebral peduncles or crus cerebri or crura cerebri. The posterior part of the midbrain is made up of projected optic lobes called the colliculi.

Hence, the correct answer is 'Longitudinal bands of nerve fibres'