Where are cortical interneurons primarily generated?

Where are cortical interneurons primarily generated?

• A. Ventricular zone of cortex
• B. Ganglionic eminences
• C. Hippocampus
• D. Thalamus

Answer: (B)

Cortical interneurons originate from the ventral forebrain, specifically the ganglionic eminences in the developing subpallium. From there, these GABAergic interneurons migrate tangentially into the cortex to populate cortical circuits, where they provide inhibitory control over principal neurons. This is distinct from the cortical excitatory neurons, which are produced in the ventricular zone of the dorsal telencephalon and migrate radially to form the cortical layers. The hippocampus and thalamus are separate regions with their own development, but the primary source for cortical interneurons is the ganglionic eminences.

Cortical interneurons originate from the ventral forebrain, specifically the ganglionic eminences in the developing subpallium. From there, these GABAergic interneurons migrate tangentially into the cortex to populate cortical circuits, where they provide inhibitory control over principal neurons. This is distinct from the cortical excitatory neurons, which are produced in the ventricular zone of the dorsal telencephalon and migrate radially to form the cortical layers. The hippocampus and thalamus are separate regions with their own development, but the primary source for cortical interneurons is the ganglionic eminences.