Effects of different therapeutic physical factors of electromagnetic (millimeter wavelengths waves, polychromatic light) and mechanical (high- and low-frequency ultrasound) nature on the pulsed electrical activity of afferent somatic fibers in n. saphenus were evaluated in acute experiments using anesthetized rats. It was shown that the action of these factors on the afferent nerve impulsation frequency (its increase or decrease) depends on the choice of dosimetric parameters.

Acute and chronicle experiments on rats showed that EMI EHF and LILI on skin surface of rat paw caused changes (increase or decrease) in the pattern of afferent impulsation in n. saphenus depending on parameters of the applied irradiation. LILI and EMI EHF activates basic metabolism. EMI EHF with 5,6 mm wave length demonstrates the most pronounced activating effect on metabolic processes, while EMI EHF with 7,1 wave length evokes opposite effect.

Change of impulse activity in branches of n. saphenus caused by influence of linearly polarized light with various wave lengths on the skin of rat's hind limb was studied. It was established that polarized light effect on skin receptor endings depended on wave length. Exposure of skin to red and blue parts of spectrum increased afferent impulsing of peripheral nerve for a short time, and influence of polychromatic polarized light (400-2000 nm) significantly decreased it for a long time (like lidocaine effect).