Which structures are major derivatives of the telencephalon?

Which structures are major derivatives of the telencephalon?

• A. Cerebral cortex, basal ganglia, lateral ventricles
• B. Thalamus, hypothalamus, retina, third ventricle
• C. Midbrain, pons
• D. Cerebellum

Answer: (A)

The telencephalon forms the cerebrum, including the cerebral cortex and the deep gray matter known as the basal ganglia, and its growing mantle creates the lateral ventricles. Because these structures arise from the telencephalon, they are its major derivatives, making this the best choice. Other structures listed come from other parts of brain development: the thalamus, hypothalamus, retina, and the third ventricle come from the diencephalon; the midbrain and pons originate from the mesencephalon and related hindbrain regions; and the cerebellum arises from the metencephalon.

The telencephalon forms the cerebrum, including the cerebral cortex and the deep gray matter known as the basal ganglia, and its growing mantle creates the lateral ventricles. Because these structures arise from the telencephalon, they are its major derivatives, making this the best choice. Other structures listed come from other parts of brain development: the thalamus, hypothalamus, retina, and the third ventricle come from the diencephalon; the midbrain and pons originate from the mesencephalon and related hindbrain regions; and the cerebellum arises from the metencephalon.