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The activity has an image with defined hotspot areas. The hotspot areas in the image are labeled as:

Corpus Callosum
Fornix
Lateral Ventricle
Lateral Dorsal Nucleus
Mediodorsal Nucleus
Internal Medullary Lamina
Ventral Posterolateral Nucleus
Zona Incerta
Thalamic Fasciculus, nerve fibers forming a composite bundle containing cerebellothalamic (crossed) and pallidothalamic (uncrossed) fibres that is insinuated between the thalamus and zona incerta. Notably, connects the Medial Globus Pallidus (GPm or Globus Pallidus Interna - GPi) to the VA and VL Nucleus of the Thalamus.
Optic Tract, originates from Retinal Ganglion Cells, called "tract" after the Chiasm. Terminates in the LGN.
Mammillary Bodies, main afferent is through the Fornix
Amygdala
Third Ventricle