In a child with hydrocephalus and developmental delays, which division of the neural tube is likely affected during development?

• A. Diencephalon
• B. Mesencephalon
• C. Metencephalon
• D. Prosencephalon

Answer: (C)

The correct answer is the metencephalon. In the context of hydrocephalus and developmental delays, the development of the hindbrain structures, which include the metencephalon, is particularly relevant. The metencephalon gives rise to the pons and cerebellum, both of which play crucial roles in various neurological functions, including motor control and coordination.

Hydrocephalus often results from an obstruction of cerebrospinal fluid (CSF) flow, which can affect the development and function of the neural tube derivatives in this region. Abnormalities in the metencephalon can manifest in ways that lead to both the physical symptoms of hydrocephalus and accompanying developmental delays, as the structures formed by this division of the neural tube are critical for cognitive and motor development.

The interplay between hydrocephalus and developmental delays often suggests that there may be underlying developmental malformations linked to the embryological origins of these brain structures, making the metencephalon a focal point in the examination of such developmental issues in a child.