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The figure depicts three-dimensional reconstructions showing the development of the apical trunk, layer V pyramidal cells, visual cortex, cat, Cajal histological preparations, Golgi-method. (a) Newborn cat. (b) 9-day-old cat. (c) 20-day-old cat. (d, e) one-month-old cat. Filopodia and protospines are color coded in green, and their number decreases with the animal age.
