In 'Drosophila melanogaster' larvae, brain stem cells are called neuroblasts that, upon division, generate another stem cell and a glanglion mother cell (GMC) that is committed to differentiation. Later, the GMC specialises in neuron or glial cell (cells that support neurons). This cell division strategy, called asymmetric mitosis, allows stem cells to produce large amounts of tissue in a relatively long period of time.