Results^$ obtained from the screening experiments for seeding densities.

CP: cultivation period; SD: seeding density. $For a better overview, only results from one preparation were shown for 5 days of cultivation. §spheroidal morphology with no or short neurites (restricted neuronal morphology); Confluency: rated confluency in per cent; optical evaluation of the whole well under bright-field conditions using a 40-fold magnification; Cell debris, conglomerates, and neuronal yield. −: no debris, conglomerates, or neurons; +: poor amount; +(+): poor-middle; ++: middle amount; ++(+): middle-high; +++: high amount.