Complex sentence: A cortical minicolumn is a vertical column through the cortical layers of the brain, comprising perhaps 80--120 neurons, except in the primate primary visual cortex (V1), where there are typically more than twice the number.
Split into simpler sentences: A cortical minicolumn is a vertical column through the cortical layers of the brain. Minicolumns comprise perhaps 80--120 neurons, except in the primate primary visual cortex (V1), where there are typically more than twice the number.