The Biological Neuron The synapse Soma Axon Terminal button Dendrite Nucleus Synap Ne euro gap transmitters Terminal buttons Dentate Schematic of biological neuron 10 billion neurons in human brain 10 billion synapses in human brain Summation of input stimuli Chemical transmission and Spatial (signals) modulation of signals emporal (pulses) · Inhibitory synapses Threshold over composed inputs · Excitatory synapses Constant firing strength 02/02/2021 Artificial Neural Networks02/02/2021 Artificial Neural Networks - I 4 The Biological Neuron • 10 billion neurons in human brain • Summation of input stimuli – Spatial (signals) – Temporal (pulses) • Threshold over composed inputs • Constant firing strength • billion synapses in human brain • Chemical transmission and modulation of signals • Inhibitory synapses • Excitatory synapses 6 10