Figure 3.

The subcellular distribution of cerebellar energy use by cell type. (A) Purkinje cells. Most energy is used on action potentials and postsynaptic receptors. (B) Granule cells. Most energy is used to maintain the resting potential along the long parallel fibers. (C, D) Inhibitory neurons use most energy on postsynaptic receptors and action potentials. (C) Molecular layer interneurons. (D) Golgi cells. ap, action potentials; post-syn, postsynaptic receptors; pre-syn, presynaptic Ca²⁺ entry and vesicle cycling; re-cyc, transmitter recycling (ATP used on glial uptake of transmitter and its metabolic processing, and on packaging transmitter into vesicles in the releasing cell); rp, resting potential.