Figure 2.

Alternation of electrical field: after the injury, an electric current is formed between the healthy and injured tissues, whose poles alternate with the passage of days. Initially the center of the wound is positive in relation to intact skin (A), there is a shift of charges after 72 h (B), an increase of electric current until about the 8th day (C), a decrease of the current from about the 10th day (D), and after 15–16 days the electric current turns to the original values (E). This effect may be related to changes in pH caused by tissue destruction, attracting or repelling anions and cations.