Please select the eligibility criteria that correspond to the clinical trial below.
Title: The Use of Transcranial Direct Current Stimulation (tDCS) to Study Implicit Motor Learning on Patients With Brain Injury
Brief Summary: The purpose of this study is to study motor learning and recovery of patients with brain damage caused by traumatic brain injury or stroke with transcranial direct current stimulation (tDCS). It is hypothesized that anodal tDCS on the lesion side and/or cathodal tDCS on the healthy side of motor cortex could improve the recovery of motor function such as learning.


Options:
A: Inclusion Criteria:

* TBI or stroke patients
* with partially preserved fine motor function

Exclusion Criteria:

* with metal clips in head or device (e.g. pacemaker)
* with active CNS drugs
B: Inclusion Criteria:

1. Age over 21 years
2. Ischemic stroke confirmed by CT or MRI within the previous 6 weeks
3. No history of prior ischemic or hemorrhagic stroke with associated motor deficits (prior stroke with no motor symptoms is allowed)
4. Residual unilateral arm weakness with Fugl-Meyer Upper Extremity (FM-UE) score 6-40 at time of enrollment.
5. Ability to give informed consent and understand the tasks involved.

Exclusion Criteria:

1. Space-occupying hemorrhagic transformation or associated intracranial hemorrhage.
2. Arm impairment that is too severe or too mild on day of baseline testing just prior to beginning of the study intervention.
3. Recent botox injection to upper limb or planned botox injection over the course of the 7-month study duration.
4. Cognitive impairment, with score on Montreal Cognitive Assessment (MoCA) ≤ 20.
5. History of physical or neurological condition that interferes with study procedures or assessment of motor function (e.g. severe arthritis, severe neuropathy, Parkinson's disease).
6. Inability to sit in a chair and perform upper limb exercises for one hour at a time.
7. Participation in another upper extremity rehabilitative therapy study during the study period.
8. Terminal illness
9. Social and/or personal circumstances that interfere with ability to return for therapy sessions and follow up assessments.
C: Inclusion Criteria:

1. Ischemic stroke affecting the right hemisphere, confirmed by CT or MRI.
2. Persistent neglect for one month after ictus (confirmed by BIT).
3. Prestroke functional independence (modified Rankin Scale score 0-2).
4. Between 18-90 years of age

Exclusion Criteria:

1. Patients younger than 18.
2. Patients who do not understand verbal or written English (ie.need of translaters)
3. bilateral infarcts (Confirmed by CT, MRI)
4. Dementia (MOCA, Score \<26).
5. Neurological Disease (eg. Parkinson's Disease, epilepsy, MS)
6. Significant morbidity (eg cancer, severe cardiac failure) likely to affect participation.
7. Alcohol excess (more than 50/40 units a week for men/women respectively).
8. Patients who fall under the exclusion criteria for TDCS which includes patients suffering from a stroke related seizure :

History of epilepsy, medications or psychoactive drugs that can lower seizure threshold \[imipramine, amitriptyline, doxepine, nortriptyline, maprotiline, chlorpromazine, clozapine, foscarnet, ganciclovir, ritonavir, amphetamines, cocaine, (MDMA, ecstasy), phencyclidine (PCP, angel dust), ketamine, gammahydroxybutyrate (GHB), alcohol, theophylline\]. Withdrawal from alcohol, barbiturates, benzodiazepines, meprobamate, chloral hydrate. Patients who are pregnant or have suffered from a stroke-related seizure.
D: Inclusion Criteria:

* diagnosis of a stroke
* more than 6 months of stroke onset
* aged 50 years or above
* community-dwelling
* medically stable
* score ≥21 on the Montreal Cognitive Assessment (MoCA)
* score ≤ 25 on the Mini Balance Evaluation Systems Test (Mini-BESTest)
* able to ambulate without physical assistance of another person as determined during the 10-meter walk test
* ability to follow 3-step commands

Exclusion Criteria:

* having neurological conditions other than stroke
* not community-dwelling prior to the stroke event
* significant receptive and expressive aphasia
* severe and uncorrected hearing or visual deficits
* serious musculoskeletal disorders (e.g. amputation)
* serious cardiovascular conditions affecting the ability to participate in exercise training
* pain experienced at rest or movement
* other serious illnesses that preclude participation

Answer: A