The Living Circuit

From the Lesson

THE LIVING CIRCUIT — HOW ROCKS BECAME WIRES

Biology is an electrical phenomenon. Every nerve impulse, every heartbeat, every thought is an electrical event. The brain consumes 20% of the body's energy (~20 watts out of ~100 watts total metabolic output; Raichle and Gusnard, 2002, "Appraising the Brain's Energy Budget," Proceedings of the National Academy of Sciences, 99, pp. 10237-10239) to maintain its electrical fields. Cell membranes hold a voltage potential of approximately -70 millivolts — scale this up by the thinness of the membrane (~7 nm), and it represents an electric field of roughly 10 million volts per meter, comparable to a lightning bolt.

We are not chemical machines that happen to use electricity. We are electrical systems that happen to be built from chemistry. And the question that connects the Expanding Earth series to the deepest mysteries of biology is: where did biological electricity come from?

The answer is in the rocks.

ROBERT O. BECKER — THE BODY ELECTRIC

In the 1960s and 70s, orthopaedic surgeon Robert O. Becker conducted a series of experiments at the VA Hospital in Syracuse, New York, that should have revolutionised medicine. They were instead marginalised, defunded, and largely forgotten — because their implications threatened too many established paradigms simultaneously. His findings were published in over 100 peer-reviewed papers and summarised in "The Body Electric: Electromagnetism and the Foundation of Life" (Becker, R.O. & Selden, G., William Morrow, 1985) and "Cross Currents: The Perils of Electropollution, the Promise of Electromedicine" (Becker, R.O., Tarcher, 1990).

Becker discovered that the human body runs on a DC (direct current) electrical system that is entirely separate from, and more fundamental than, the AC (alternating current) nerve impulse system taught in medical schools. His findings:

BONE PIEZOELECTRICITY: Bone is piezoelectric — like quartz. When bone is stressed (by weight-bearing, impact, or muscle tension), it generates electrical voltages. Becker demonstrated that these voltages are not random — they follow precise patterns that guide bone growth, repair, and remodelling (Becker, R.O., Bassett, C.A.L., and Bachman, C.H., 1964, "Bioelectric Factors Controlling Bone Structure," in "Bone Biodynamics," ed. H.M. Frost, Little Brown, pp. 209-232). A fracture generates a specific electrical signal — the "current of injury" — that recruits osteoblasts (bone-building cells) to the injury site.

This is now well-established: Bassett, Pawluk, and Becker (1964, "Effects of Electric Currents on Bone In Vivo," Nature, 204, pp. 652-654) demonstrated that applied DC currents stimulate osteogenesis. By 1979, FDA-approved bone growth stimulators based on Becker's work were in clinical use. Today, pulsed electromagnetic field (PEMF) therapy for non-union fractures is standard orthopaedic practice, validated by meta-analyses (Victoria et al., 2009, "Bone Stimulation for Fracture Healing: What's All the Fuss?" Indian Journal of Orthopaedics, 43, pp. 117-120).

Bone is made of hydroxyapatite — Ca₁₀(PO₄)₆(OH)₂ — a calcium phosphate mineral embedded in a collagen protein matrix. The mineral component provides the piezoelectric response (Fukada and Yasuda, 1957, "On the Piezoelectric Effect of Bone," Journal of the Physical Society of Japan, 12, pp. 1158-1162). Your skeleton is a quartz-like transducer array, converting mechanical stress into electrical signals — the same function that quartz performs in the Earth's crust.

DC CURRENT SYSTEM: Becker mapped a perineural (alongside-the-nerve) DC current system that flows through the body via Schwann cells and glial cells — the "support" cells that surround neurons. This current is not the nerve impulse (which is a rapid AC signal traveling along axons at ~1-120 m/s). It is a slow, steady, analog current that Becker demonstrated controls:

Regeneration — He stimulated partial limb regeneration in rats using DC currents matching the body's own patterns (Becker, R.O., 1972, "Stimulation of Partial Limb Regeneration in Rats," Nature, 235, pp. 109-111). This was a landmark: mammals do not normally regenerate limbs, but Becker showed that the electrical signal, not a chemical growth factor, is the primary trigger.

Healing — Fractures healed faster and more completely when their natural piezoelectric currents were supplemented. The "current of injury" at a wound site is measurable at ~10-100 μA/cm² (microamperes per square centimeter; Zhao et al., 2006, "Electrical Signals Control Wound Healing through Phosphatidylinositol-3-OH Kinase-γ and PTEN," Nature, 442, pp. 457-460).