Please select the eligibility criteria that correspond to the clinical trial below.
Title: Transcranial Direct Current Stimulation in Older Persons With Knee Pain: Randomized Pilot Study
Brief Summary: The purpose of this research is to study the effects of Transcranial Direct Current Stimulation (tDCS) on clinical pain, mobility disability, and pain sensitivity to gain a better understanding of the factors that cause pain and disability in people with knee osteoarthritis (OA). In particular, people from different ethnic and racial groups may experience OA pain differently which is why the focus will be on older Asian Americans and non-Hispanic whites. It is important to find a reason for such difference so that a better treatment can be found for all OA patients. In addition, the research study will examine if there is any ethnic differences in pain and mobility disability. The investigator hypothesize that Asian Americans will report greater pain and mobility disability than non-Hispanic whites, and that active tDCS will result in improvement in pain and disability compared to sham tDCS.


Options:
A: Inclusion Criteria:

* Female or male patient, aged from 18 to 65 years
* Patient presenting a primary fibromyalgia answering the criteria of the ACR
* At present painful patient with a digital echelle of the briefing inventory bread superior or equal to 4/10
* Patient presenting a stable treatment since at least 1 less

Exclusion Criteria:

* Patient minor
* pregnant woman
* women in age to procreate without contraception
* patient deprived of freedom further to a court or administrative order
* patient presenting a secondary fibromyalgia
B: Inclusion Criteria:

* they have self-reported unilateral or bilateral knee OA pain according to American College of Rheumatology criteria
* they can understand, speak and read English
* they are able to walk for 6-minutes
* they are willing to be randomized to either the intervention or control group
* they are available for five consecutive daily sessions and for a follow-up phone interview each week for three weeks post-stimulation sessions
* they have no plan to change medication regimens for pain throughout the trial
* they are willing and able to provide written informed consent

Exclusion Criteria:

* knee replacement or non-arthroscopic surgery to the affected knee
* serious medical illness, such as uncontrolled hypertension (i.e., Systolic Blood Pressure/Diastolic Blood Pressure of ≥ 150/95), congestive heart failure, pacemaker, or history of acute myocardial infarction
* peripheral neuropathy
* systemic rheumatic disorders, including rheumatoid arthritis, systemic lupus erythematosus, and fibromyalgia
* alcohol/substance abuse
* cognitive impairment (i.e., Mini-Mental Status Exam score ≤ 23)
* history of brain surgery, tumor, seizure, stroke, or intracranial metal implantation
* pregnancy or lactation for females
* hospitalization within the preceding year due to psychiatric illness
C: Inclusion Criteria:

* Over 18 years of age
* History of moderate to severe sublesional pain

Exclusion Criteria:

* Active alcohol or drug dependence, as self-reported
* A history of bipolar disorder or psychosis, as self-reported
* Inability to travel to the study site,
* Current use of any of the following anti-epileptic medications or dopaminergic medications known to reduce or inhibit the benefits of tDCS treatment \[53\]: carbamazepine, oxcarbazepine, phenytoin, ropinirole (Requip), pramipexole (Mirapex), and cabergoline (Dostinex),
* The following contradictions to tDCS: implanted metal plates in the head, or deep brain stimulator (spinal cord implants, including baclofen pumps, are not a contraindication as cranial currents do not reach the spinal cord \[24\]).
* Pregnancy at time of enrollment
* Current use of ventilator.
D: Inclusion Criteria:

1. Males and females greater than equal to 18 years old.
2. Females with a confirmed negative pregnancy test (which is conducted within 24 hours of admission to the hospital as part of standard of clinical care).
3. Confirmed diagnosis of chronic pain.
4. Must be admitted to the Pain Management Program at The Menninger Clinic.

Exclusion Criteria:

1. Presence of actively psychosis, cognitively impairment.
2. Contraindications to tDCS:

   1. Presence of any preexisting irritation, cuts, or lesions where the tDCS will be placed (i.e., the forehead).
   2. Presence of any preexisting unstable medical conditions, or conditions that may increase the risk of stimulation such as uncontrolled epilepsy.
   3. Presence of history of severe cranial trauma with alteration of the cranial anatomy or metallic intracranial implants.
3. None fluent in the English language.
4. Presence of known sensitivity to Lidocaine 4%.

Answer: B