In addition to cilia formation, the control of cilia disassembly is also critical in determining cortical growth, for example mutations in Cenpj or centrosomal-P4.1-associated protein (CPAP) cause dwarfism, microcephaly and intellectual disability (Al-Dosari et al., 2010) through a depletion of the cortical stem cell pool (Gabriel et al., 2016; Lin et al., 2020). Here, CPAP is linked to microcephaly.