Which brain structure is anatomically composed of the midbrain, pons varolii, and medulla oblongata?
Answer and explanation
Correct answer: D. Brainstem
- Step 1: The human brain is divided into forebrain, midbrain, and hindbrain.
- Step 2: The brainstem is the stalk-like structure connecting the cerebral hemispheres with the spinal cord.
- Step 3: It consists of three contiguous structures: the midbrain, the pons varolii, and the medulla oblongata.
- Step 4: The cerebellum is part of the hindbrain but is explicitly excluded from the brainstem.
Answer
Brainstem
Why not the others: 'Limbic system' consists of the amygdala, hippocampus, cingulate gyrus, and parts of the hypothalamus regulating emotions and memory; 'Diencephalon' consists of the epithalamus, thalamus, and hypothalamus; 'Cerebral cortex' is the outer gray matter sheet of the cerebral hemispheres.
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