Quantum Bayesian Networks

July 28, 2009

The Human Brain, the Mother of All Bayesian Networks

Filed under: Uncategorized — rrtucci @ 2:02 am

number of neurons in human brain: 10^11
number of connections (synapses) entering each neuron: 7,000
neuronal firing rate: 100/sec

Each neuron acts like a node of a gigantic Bayesian network. The synapses are like the arrowheads of the arrows entering each node of the B net. Maybe only small subsets of nodes are working together at any given time.

Refs:

  • From Wikipedia for neuron:
    “The human brain has a huge number of synapses. Each of the 10^11 (one hundred billion) neurons has on average 7,000 synaptic connections to other neurons. It has been estimated that the brain of a three-year-old child has about 10^15 synapses (1 quadrillion). This number declines with age, stabilizing by adulthood. Estimates vary for an adult, ranging from 10^14 to 5 x 10^14 synapses (100 to 500 trillion).[13]”
  • From here:
    “THE NERVE IMPULSE (primarily an electrical event): Each neuron is like a tiny biological battery ready to be discharged. It takes about one-thousandth of a second for a neuron to fire an impulse and return to its resting level. Thus, a maximum of 1,000 nerve impulses per second is possible. However, firing rates of 1 per second to 300-400 per second are more typical.”
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