Exploring the Primitive yet Vital Functions of the Brainstem in CNS Regulation

The most primitive part of the CNS is thediencephaloncerebrumcerebellumbrainstem

brainstem

The most primitive part of the CNS is the brainstem. The brainstem is the most inferior (lower) part of the brain that connects the cerebrum, cerebellum, and spinal cord. It consists of three structures, the medulla oblongata, pons, and midbrain that regulate basic life-supporting functions such as breathing, heart rate, swallowing, digestion, blood pressure, and sleep-wake cycles. The brainstem is considered the most primitive part of the CNS because the functions it controls are essential for survival, and it is one of the earliest regions of the brain to evolve during embryonic development.

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