The Heart and Brain SpikerBox though, is completely different from the Muscle SpikerBox Box, as heart and EEG rhythms are much slower that EMG action potentials, so you can’t record muscle or individual neuron activity with the Heart and Brain SpikerBox. But….Showing EKGs and EEGs in a classroom is super compelling, as students love seeing their heart and brain rhythms, something sorta magical happens in a student when they see their own heart  rhythm for the first time.