A deep brain stimulation device comprising: - a stimulation probe comprising: ▪ a longilineal body having a central channel void of material running therethrough, extending between a distal portion and a proximal end of the probe, the central channel being open at said proximal end and the distal portion of the body being capable of transmitting a predetermined wavelength; ▪ electrodes (20a, 20b, 20c, 20d) affixed to an outer surface of the body in the distal portion of the probe for electric brain stimulation; and ▪ electrical terminals (22a, 22b, 22c, 22d) affixed to an outer surface of the body in the proximal end of the probe and connected to the electrodes (20a, 20b, 20c, 20d) for their electric power supply; - an electrical housing comprising a channel having electrical terminals (66a, 66b, 66c, 66d) housed therein, said channel being open at one of its ends to receive the proximal portion of the probe to place into contact the electrical terminals (22a, 22b, 22c, 22d) of the probe and the electrical terminals (22a, 22b, 22c, 22d) of the housing; the channel of the electrical housing being open at a second end, opposed to first end, through which is inserted the proximal portion of the probe, - an electrical extension lead affixed to the electrical housing and connected to the electrical terminals (66a, 66b, 66c, 66d) of the housing, said device further comprising: - a waveguide capable of guiding the predetermined wavelength, housed at least partly in the central channel of the probe body, and extending all the way to the distal portion of the probe for the illumination of the brain therethrough; and - a transmitter housing capable of being connected to the proximal end of the waveguide for the injection into it of the predetermined wavelength; the device being characterized: - in that the channel is cylindrical and having a diameter slightly smaller than the diameter of the proximal portion of probe, so that when the proximal portion of the probe is inserted into the channel through the end, the electrical terminals (22a, 22b, 22c, 22d) of the housing of the probe come respectively into contact with the electrical terminals (66a, 66b, 66c, 66d) of the housing; - and in that said electrical extension lead is affixed to the housing without obstructing the second end of the channel of the housing. - a stimulation probe comprising: ▪ a longilineal body having a central channel void of material running therethrough, extending between a distal portion and a proximal end of the probe, the central channel being open at said proximal end and the distal portion of the body being capable of transmitting a predetermined wavelength; ▪ electrodes (20a, 20b, 20c, 20d) affixed to an outer surface of the body in the distal portion of the probe for electric brain stimulation; and ▪ electrical terminals (22a, 22b, 22c, 22d) affixed to an outer surface of the body in the proximal end of the probe and connected to the electrodes (20a, 20b, 20c, 20d) for their electric power supply; ▪ a longilineal body having a central channel void of material running therethrough, extending between a distal portion and a proximal end of the probe, the central channel being open at said proximal end and the distal portion of the body being capable of transmitting a predetermined wavelength; ▪ electrodes (20a, 20b, 20c, 20d) affixed to an outer surface of the body in the distal portion of the probe for electric brain stimulation; and ▪ electrical terminals (22a, 22b, 22c, 22d) affixed to an outer surface of the body in the proximal end of the probe and connected to the electrodes (20a, 20b, 20c, 20d) for their electric power supply; - an electrical housing comprising a channel having electrical terminals (66a, 66b, 66c, 66d) housed therein, said channel being open at one of its ends to receive the proximal portion of the probe to place into contact the electrical terminals (22a, 22b, 22c, 22d) of the probe and the electrical terminals (22a, 22b, 22c, 22d) of the housing; the channel of the electrical housing being open at a second end, opposed to first end, through which is inserted the proximal portion of the probe, - an electrical extension lead affixed to the electrical housing and connected to the electrical terminals (66a, 66b, 66c, 66d) of the housing, - a waveguide capable of guiding the predetermined wavelength, housed at least partly in the central channel of the probe body, and extending all the way to the distal portion of the probe for the illumination of the brain therethrough; and - a transmitter housing capable of being connected to the proximal end of the waveguide for the injection into it of the predetermined wavelength; the device being characterized: - in that the channel is cylindrical and having a diameter slightly smaller than the diameter of the proximal portion of probe, so that when the proximal portion of the probe is inserted into the channel through the end, the electrical terminals (22a, 22b, 22c, 22d) of the housing of the probe come respectively into contact with the electrical terminals (66a, 66b, 66c, 66d) of the housing; - and in that said electrical extension lead is affixed to the housing without obstructing the second end of the channel of the housing.