The frontal, parietal, occipital, and temporal lobes are interconnected by the white matter tract, the superior longitudinal fasciculus. The large white matter tract, the corpus callosum connects both hemispheres. Directly dorsal to the corpus callosum lies the cingulate gyrus, which is part of the limbic system, specifically the circuit of Papez.

• Corpus Callosum (white): Sculpt a flat, thick ‘X’ and let this ‘X’ cover the lateral ventricles dorsally.
• Cingulate Gyrus (pink): Form thin, long rolls of pink clay. Place one roll ‘curving’ over the left side of the corpus callosum and another roll ‘curving’ over the right side.
• Superior Longitudinal Fasciculus (white): Sculpt two C-shapes and place them on both lateral sides, so the C-shape covers the ventricular model.