Embryologically, the hippocampus originates from which brain region?

Embryologically, the hippocampus originates from which brain region?

• A. Telencephalon (medial temporal lobe)
• B. Diencephalon
• C. Mesencephalon
• D. Rhombencephalon

Answer: (A)

Think about how the forebrain develops: the prosencephalon splits into the telencephalon and the diencephalon. The hippocampus is a limbic structure housed in the medial temporal lobe, and it forms from the telencephalon. So, its embryologic origin is the telencephalon, specifically the cerebral hemispheres’ medial temporal region that gives rise to the hippocampal formation. The diencephalon forms the thalamus and hypothalamus, the mesencephalon becomes the midbrain, and the rhombencephalon becomes the hindbrain (pons, cerebellum, and medulla).

Think about how the forebrain develops: the prosencephalon splits into the telencephalon and the diencephalon. The hippocampus is a limbic structure housed in the medial temporal lobe, and it forms from the telencephalon. So, its embryologic origin is the telencephalon, specifically the cerebral hemispheres’ medial temporal region that gives rise to the hippocampal formation. The diencephalon forms the thalamus and hypothalamus, the mesencephalon becomes the midbrain, and the rhombencephalon becomes the hindbrain (pons, cerebellum, and medulla).