The purpose of this study is to improve the inhibitory control functions through transcranial Direct Current Stimulation (tDCS) in adolescents with ADHD symptoms.
In this study, 20 high school students will be selected from screening of 250 students using the Wender Utah Rating Scale and Conner’s Adult ADHD Rating Scale. That is intended to measure ADHD in childhood and adulthood. The SCL-25 (Symptoms Checklist) questionnaire will be at work to measure general psychological health of the participants. All the subjects will be tested during the application of Stroop and Go/no-Go tasks used to measure inhibitory control using 1.5 mA of tDCS for 15 minutes on the left DLPFC (Dorsolateral Prefrontal Cortex). Left dorsolateral prefrontal cortex (F4) is selected as a cortical target and right orbitofrontal is selected as a reference. In this study we will use three stimulation conditions; (i) actual anodal current tDCS will be applied on the left DLPFC (F3) according to the 10-20 EEG electrode systems and the cathode electrode will be placed on the right side of the forehead above the eyebrow (Fp1). (ii) Actual cathodal current tDCS will be placed on the right side of the forehead above the eyebrow (Fp1) according to the 10-20 EEG electrode systems, and cathode electrode will be applied on the left DLPFC. (iii) The sham condition serves as a method of control that is performed and consisted of a 15 s ramp up and then 15 s down with the electrodes remaining on the head for the entire duration of the tasks. All participants will be subjected to the three tDCS conditions. Therefore, the polarity of tDCS is randomized and counterbalanced across participants, and the washout period is 72 h between each of the three sessions.
General information
Acronym
IRCT registration information
IRCT registration number:IRCT2014062318192N1
Registration date:2014-07-22, 1393/04/31
Registration timing:registered_while_recruiting
Last update:
Update count:0
Registration date
2014-07-22, 1393/04/31
Registrant information
Name
Zahra Soltaninejad
Name of organization / entity
Shahid Beheshti University
Country
Iran (Islamic Republic of)
Phone
+98 21 2243 1617
Email address
z.soltaninejad@mail.sbu.ac.ir
Recruitment status
Recruitment complete
Funding source
Shahid Beheshti University
Expected recruitment start date
2014-06-22, 1393/04/01
Expected recruitment end date
2014-09-23, 1393/07/01
Actual recruitment start date
empty
Actual recruitment end date
empty
Trial completion date
empty
Scientific title
Effect of transcranial Direct Current stimulation on improvement of inhibitory control in attention deficit and hyperactivity disorder
Public title
Effect of transcranial Direct Current stimulation on inhibitory control
Purpose
Treatment
Inclusion/Exclusion criteria
Inclusion criteria: existence of ADHD symptoms diagnosed through Conner’s Adult ADHD Rating Scale and Wender Utah Rating; existence of general psychological health via SCL-25; being right-handed; aged between 15 and 18.
Exclusion criteria: Present or past history of neurological or psychiatric disorders; head injury or loss of consciousness; subject is unable of tolerating the tDCS stimulation.
Computer tasks for assessing inhibitory control: Go/no Go and Stroop
Secondary outcomes
1
Description
tDCS side effects: headache, vertigo, tingling, itching
Timepoint
Immediately after real stimulation and Sham
Method of measurement
tDCS side effects questionnaire
Intervention groups
1
Description
Left anodal stimulation: In this intervention anode will be placed on the left DLPFC that enhance the cortical activities and cathode will be placed on the right orbitofrontal.
Category
Treatment - Other
2
Description
Left cathodal stimulation: In this intervention cathode will be placed on the left DLPFC that enhance the cortical activities and anode will be placed on the right orbitofrontal.
Category
Treatment - Other
3
Description
Sham stimulation: in this situation electrodes will be placed on the participant's head for 15 minutes without any stimulation. This session will be considered as a method of control.
Category
Treatment - Other
Recruitment centers
1
Recruitment center
Name of recruitment center
Seyedoshohada Highschool
Full name of responsible person
Mr. Mohammadreza Baghkhani
Street address
56th Alley, Sarbaz St.
City
Kerman
Sponsors / Funding sources
1
Sponsor
Name of organization / entity
Vice-presidency of Psychology faculty of Shahid Beheshti University