Eliciting analgesia by transcranial electrical stimulation

A method of transcranial electrical stimulation, comprising:

• a) removably fixing a first electrode and a pair of second electrodes to the skin of said subject's head;
• b) supplying electrical current to said first electrode and to said pair of second electrodes, wherein said electrical current comprises rectangular current pulses superimposed on direct current, and wherein said current pulses are supplied at a particular frequency of between approximately 30 Hz and approximately 65 Hz, wherein a total current value supplied is between approximately 0.2 mA and approximately 20 mA, wherein said total current value is a sum of said direct current and a Mean Absolute Deviation (MAD) value of said current pulses;
• and
• c) periodically changing said particular frequency to a different frequency.

A method of treating a medical condition in a human subject, comprising:

• a) removably fixing a first electrode and a pair of second electrodes to the skin of said subject's head;
• b) supplying electrical current to said first electrode and to said pair of second electrodes, wherein said electrical current comprises rectangular current pulses superimposed on direct current, and wherein said current pulses are supplied at a particular frequency of between approximately 30 Hz and approximately 65 Hz, wherein a total current value supplied is between approximately 0.2 mA and approximately 20 mA, wherein said total current value is a sum of said direct current and a Mean Absolute Deviation (MAD) value of said current pulses;
• and
• c) periodically changing said particular frequency to a different frequency;
• wherein said medical condition is selected from the group consisting of acute and chronic pain syndrome, immune system depression, and decreased wound healing.

A method of treating a medical condition in a human subject, comprising:

• a) removably fixing a first electrode and a pair of second electrodes to the skin of said subject's head;
• b) supplying electrical current to said first electrode and to said pair of second electrodes, wherein said electrical current comprises rectangular current pulses superimposed on direct current, and wherein said current pulses are supplied at a particular frequency of between approximately 30 Hz and approximately 65 Hz, wherein a total current value supplied is between approximately 0.2 mA and approximately 20 mA, wherein said total current value is a sum of said direct current and a Mean Absolute Deviation (MAD) value of said current pulses;
• and
• c) periodically changing said particular frequency to a different frequency;
• wherein said medical condition is selected from the group consisting of alcohol withdrawal, opiate withdrawal, Attention Deficit Disorder, anxiety, depression, mood disturbance, Post-Traumatic Stress Disorder, appetite disturbance, sexual dysfunction, Parkinson's disease, Alzheimer's disease, and neurological dysfunction.

A method of producing a desired effect in a human subject, comprising:

• a) removably fixing a first electrode and a pair of second electrodes to the skin of said subject's head;
• b) supplying electrical current to said first electrode and to said pair of second electrodes, wherein said electrical current comprises rectangular current pulses superimposed on direct current, and wherein said current pulses are supplied at a particular frequency of between approximately 30 Hz and approximately 65 Hz, wherein a total current value supplied is between approximately 0.2 mA and approximately 20 mA, wherein said total current value is a sum of said direct current and a Mean Absolute Deviation (MAD) value of said current pulses;
• and
• c) periodically changing said particular frequency to a different frequency;
• wherein said desired effect is selected from the group consisting of elevated mood, increased attention, and stimulated immune system.