The neural canal expands into in the brain vesicles?

The neural canal expands into in the brain vesicles?

• A. Lateral ventricle
• B. Fourth ventricle
• C. Primitive ventricle
• D. Central canal

Answer: (C)

In early brain development, the hollow center of the neural tube, the neural canal, expands to form the ventricular system. The first enlargement is into a primitive ventricle, which sits at the core of the developing brain vesicles. As the forebrain, midbrain, and hindbrain differentiate into their respective vesicles, this cavity grows and gives rise to the later ventricles we learn about—the lateral ventricles from the forebrain’s telencephalon, the third ventricle from the diencephalon, and the fourth ventricle from the hindbrain region. The central canal is the continued tube lumen that runs through the spinal cord and brainstem, not a newly formed ventricle in the brain vesicles. That makes the primitive ventricle the correct initial expansion of the neural canal.

In early brain development, the hollow center of the neural tube, the neural canal, expands to form the ventricular system. The first enlargement is into a primitive ventricle, which sits at the core of the developing brain vesicles. As the forebrain, midbrain, and hindbrain differentiate into their respective vesicles, this cavity grows and gives rise to the later ventricles we learn about—the lateral ventricles from the forebrain’s telencephalon, the third ventricle from the diencephalon, and the fourth ventricle from the hindbrain region. The central canal is the continued tube lumen that runs through the spinal cord and brainstem, not a newly formed ventricle in the brain vesicles. That makes the primitive ventricle the correct initial expansion of the neural canal.