Dendritic development in cultured hippocampal neurons after 17 days in vitro. Neurons were immunostained for MAP2, a microtubule associated protein localized to dendrites but not axons to show the ex...

Synapse formation in cultured hippocampal neurons after 7 days in vitro. Cells were immunostained for MAP2, a microtubule associated protein localized to dendrites but not axons (green), and synapsin...

Synapse formation in cultured hippocampal neurons after 7 days in vitro. Cells were immunostained for MAP2, a microtubule associated protein localized to dendrites but not axons (green), and synapsin...

Synapse formation in cultured hippocampal neurons after 7 days in vitro. Cells were immunostained for MAP2, a microtubule associated protein localized to dendrites but not axons (green), and synapsin...

Synapse formation in cultured hippocampal neurons after 7 days in vitro. Cells were immunostained for MAP2, a microtubule associated protein localized to dendrites but not axons (green), and synapsin...

Synapse formation in cultured hippocampal neurons after 7 days in vitro. Cells were immunostained for MAP2, a microtubule associated protein localized to dendrites but not axons (green), and synapsin...

Synapse formation in cultured hippocampal neurons after 7 days in vitro. Cells were immunostained for MAP2, a microtubule associated protein localized to dendrites but not axons (green), and synapsin...

Synapse formation in cultured hippocampal neurons after 7 days in vitro. Cells were immunostained for MAP2, a microtubule associated protein localized to dendrites but not axons (green), and synapsin...

Confocal image of "Brainbow" mouse cerebral cortex. In Brainbow mice, neurons randomly choose combinations of red, yellow and cyan fluorescent proteins, so that they each glow a particular color. Thi...

Confocal image of an axonal rainbow of oculomotor nerve motor axons from a "Brainbow" mouse brain, with each neuron expressing a distinct color. In Brainbow mice, neurons randomly choose combination...