Study: NCT03102710

Intervention type: DEVICE
Group type: SHAM_COMPARATOR
Intervention: transcranial direct current stimulation (tDCS)
Description: tCDS safely applies a weak electrical current to your scalp using two sponge electrodes that look like flat circular pads. The pads will be held in place on your head with a neoprene cap. The pads will be attached to a generator that will send a weak stimulus to your scalp. This current influences the way that your brain cells work. When the stimulus starts, you might feel a tingling sensation underneath the electrode pads. That sensation is not painful and goes away in seconds.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: transcranial direct current stimulation (tDCS)
Description: tCDS safely applies a weak electrical current to your scalp using two sponge electrodes that look like flat circular pads. The pads will be held in place on your head with a neoprene cap. The pads will be attached to a generator that will send a weak stimulus to your scalp. This current influences the way that your brain cells work. When the stimulus starts, you might feel a tingling sensation underneath the electrode pads. That sensation is not painful and goes away in seconds.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: transcranial direct current stimulation (tDCS)
Description: tCDS safely applies a weak electrical current to your scalp using two sponge electrodes that look like flat circular pads. The pads will be held in place on your head with a neoprene cap. The pads will be attached to a generator that will send a weak stimulus to your scalp. This current influences the way that your brain cells work. When the stimulus starts, you might feel a tingling sensation underneath the electrode pads. That sensation is not painful and goes away in seconds.

Intervention type: OTHER
Group type: SHAM_COMPARATOR
Intervention: Lidocaine cream
Description: Lidocaine cream will be applied on the arm to reduce pain sensitivity (analgesia).

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Lidocaine cream
Description: Lidocaine cream will be applied on the arm to reduce pain sensitivity (analgesia).

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Lidocaine cream
Description: Lidocaine cream will be applied on the arm to reduce pain sensitivity (analgesia).

Intervention type: OTHER
Group type: SHAM_COMPARATOR
Intervention: Capsaicin cream
Description: Capsaicin cream will be applied on the arm to increase pain sensitivity (hyperalgesia).

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Capsaicin cream
Description: Capsaicin cream will be applied on the arm to increase pain sensitivity (hyperalgesia).

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Capsaicin cream
Description: Capsaicin cream will be applied on the arm to increase pain sensitivity (hyperalgesia).

Intervention type: OTHER
Group type: SHAM_COMPARATOR
Intervention: Control cream
Description: A neutral cream will be applied on the arm as a control.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Control cream
Description: A neutral cream will be applied on the arm as a control.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Control cream
Description: A neutral cream will be applied on the arm as a control.