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Our mental calendar involves circuits in the left angular gyrus, important for sequence discrimination and connected to the same hippocampal place cell or grid cell via a band of fibers: the inferior longitudinal fasciculus.

Connecting Broca’s area with Wernicke’s is a neural network: a thick, curving bundle of billions of nerve fibres, the arcuate fasciculus, which integrates the production and the comprehension of language.

This is an image showing a 3D-printed reconstruction of the white matter pathway connecting two areas of the human brain - the arcuate fasciculus.

So named because it forms an arch, the arcuate fasciculus connects at the front of the brain to the area of the cerebral cortex linked to speech production.

This abnormality was found in an area of the brain that connects the frontal lobe and temporal lobes, called the right arcuate fasciculus.