Neuronal network in the cerebellum
Fluorescence microscopy image showing the cerebellar network of Purkinje neurons from a mouse. The neurons are visualised by labelling the cells with green fluorescent protein (GFP). Purkinje cells are specialised neurons found in layers within the cerebellum (at the back of the brain). In humans they are one of the longest types of neurons in the brain and are involved in transmitting motor output from the cerebellum.