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Active, not recruitingNCT07905729Updated Nov 3, 2026

Comparative Effects of tDCS and tACS on Pain, Dexterity, and Strength in Diabetic Peripheral Neuropathy

An interventional study of Transcranial Direct Current Stimulation (tDCS) and Transcranial Alternating Current Stimulation (tACS) in Diabetic Peripheral Neuropathy (DPN), sponsored by University of Management and Technology Lahore. Active, not recruiting at 1 site in Pakistan. Open to participants aged 45 Years to 70 Years. Per ClinicalTrials.gov, last updated 2026-11-03.

Sponsored by University of Management and Technology Lahore · Not applicable, Interventional, and Treatment

Updated Nov 3, 2026Eligibility revisedNewly registeredGo to Updates ↓
Phase
Not applicable
Study type
Interventional
Enrollment
46
Allocation
Randomized
Ages
45 Years to 70 Years
Sex
All
01

Study summary

This study will be to compare the effects of transcranial direct current stimulation and transcranial alternating current stimulation on neuropathic pain, manual dexterity and isometric muscle strength in diabetic peripheral neuropathic patients. Study design will be randomized clinical trial. Evaluation will be done by using McGill Pain Questionnaire-2, Digital force gauge sf-500 and wooden 9 hole peg board. Non-probability convenient sampling will be used and 38 subjects will be allocated to two groups by random allocation. Group A will receive TDCS and Group B will receive TACS. Both groups will receive hot pack, and ROM exercises of upper extremity before techniques application. Both groups will receive 20 sessions for the period of 4 weeks. Measurements of all the outcome variables will be taken at baseline and 4th week.

02

Conditions studied

  • Diabetic Peripheral Neuropathy (DPN)

Keywords

  • Transcranial direct current stimulation
  • Transcranial alternating current stimulation
  • neuropathic pain
  • muscle strength
  • Diabetic Neuropathy
03

In context

Neuralgia

1,100 studies on the registry are indexed under Neuralgia; 241 are open to participants now.

This study's enrollment of 46 is below the median of 52 across 831 interventional studies indexed under Neuralgia.

Browse Neuralgia studies →

Lead sponsor

University of Management and Technology Lahore is the lead sponsor of 39 studies on the registry; 20 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

The criteria were revised on the registry on Nov 3, 2026. See what changed

Ages eligible
45 Years to 70 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Age 45 to 70 years ,
  • Both Gender male and female
  • (>6.5%)
  • Neuropathic symptoms, Diabetic Neuropathic Questionnaire (DN-4= >4)
  • Visual Analogue Scale VAS (4 or higher)
  • Stable chronic pain for at least 3 preceding months.
  • Persistent pain after taking medications, such as non-steroidal anti-inflammatory drugs, tramadol, antidepressants, antiepileptic drugs, or opioids.
  • Mini Mental Status Examination (>24)

Exclusion criteria

Exclusion Criteria:

  • Any uncontrolled clinical disease (as evaluated by each patient's clinician), such as thyroid, cardiovascular, pulmonary, haematological, pulmonary, or renal disease or psychiatric disorder
  • history of substance abuse or neuropsychiatric comorbidity
  • implanted devices for pain control, such as vagal or deep brain stimulators
  • Pain attributable to other causes, such as spinal stenosis, peripheral blood vessel disease, lower extremity edema-related pain, and neuropathic pain due to a brain lesion or peripheral nerve injury,
  • for tDCS, such as an intracranial or orbital metallic implant or pacemaker
  • alcoholism
  • dizziness and amputation
Terms in these criteria, in plain language(3)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

HbA1c

A blood test of average blood sugar over the past two to three months, given as a percentage or in mmol/mol. 6.5% (48 mmol/mol) or more is the usual threshold for diabetes, normally confirmed by a second test.

MMSE and MoCA

Short tests of memory and thinking, each scored out of 30. Lower scores suggest more difficulty; criteria give a range, either to include people with memory problems or to leave them out.

Contraindication

A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.

05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Outcomes assessor)
Enrollment
46 participants (actual)

Study arms

  • Experimental
    Transcranial Direct Current Stimulation (tDCS) with Conventional Physical Therapy

    Transcranial Direct Current Stimulation (tDCS) will be applied over the primary motor cortex (M1) hand area corresponding to the C3 position according to the International 10-20 EEG system. The anodal electrode will be positioned over C3, while the cathodal electrode will be placed over the right supraorbital region. Saline-soaked sponge electrodes measuring 5 × 5 cm will be used for stimulation. A direct current of 2 mA will be delivered for 20 minutes per session. The intervention will be administered once daily, five days per week, for a total of 20 sessions over a period of 4 weeks

    Other: Transcranial Direct Current Stimulation (tDCS)

  • Active comparator
    Transcranial Alternating Current Stimulation (tACS) with Conventional Physical Therapy

    Transcranial Alternating Current Stimulation (tACS) will be applied targeting the frontal cortex and the primary motor cortex (M1). Stimulation will be delivered at an intensity of 2 mA with a frequency of 5 -10 Hz bilaterally. Each treatment session will last 20 minutes. The intervention will be administered daily for five days per week according to the treatment schedule. Standardized electrode placement and stimulation parameters will be maintained throughout the intervention period to ensure consistency across sessions

    Other: Transcranial Alternating Current Stimulation (tACS)

Interventions

  • OtherTranscranial Direct Current Stimulation (tDCS)

    Transcranial Direct Current Stimulation (tDCS) will be applied over the primary motor cortex (M1) hand area corresponding to the C3 position according to the International 10-20 EEG system. The anodal electrode will be positioned over C3, while the cathodal electrode will be placed over the right supraorbital region. Saline-soaked sponge electrodes measuring 5 × 5 cm will be used for stimulation. A direct current of 2 mA will be delivered for 20 minutes per session. The intervention will be administered once daily, five days per week, for a total of 20 sessions over a period of 4 weeks.

  • OtherTranscranial Alternating Current Stimulation (tACS)

    Transcranial Alternating Current Stimulation (tACS) will be applied targeting the frontal cortex and the primary motor cortex (M1). Stimulation will be delivered at an intensity of 2 mA with a frequency of 5 -10 Hz bilaterally. Each treatment session will last 20 minutes. The intervention will be administered daily for five days per week according to the treatment schedule. Standardized electrode placement and stimulation parameters will be maintained throughout the intervention period to ensure consistency across sessions.

06

What researchers measure

Primary outcomes

  1. Pain by McGill Pain Questionnaire-2

    The MPQ-2 is a self-report questionnaire designed to evaluate different dimensions of pain, including continuous, intermittent, neuropathic, and affective pain descriptors. The questionnaire consists of 22 pain descriptors, each rated on an 11-point numerical scale ranging from 0 (none) to 10 (worst possible).

    Time frame: at baseline and after 4th week

  2. Isometric Muscle Strength by digital force gauge SF-500

    It will measure muscle groups such as shoulder flexors, extensors, abductors, adductors, elbow flexors and extensors, wrist flexors and extensors in Kg. Before the test, a standard instruction of "push as hard as you can" will give, and during the test, the patients will be encourage to apply maximal effort. Maximal strength will exerted for 3 to 5 seconds, at which point the examiner instructed the person to relax. Maximal isometric muscle strength will recorded for all measured upper-extremity muscle groups

    Time frame: at baseline and after 4th week

  3. Manual Dexterity by Wooden 9 hole peg test

    The NHPT consists of a rectangular base and 9 pegs (7 mm in diameter, 32 mm in length). The base is divided into two parts; the container is located where the pegs will be housed in one, while a pegboard composed of 9 holes (10 mm in diameter, 15 mm deep) in which each of the pegs will be inserted is in the other. The pegboard will centered in front of the subject with the container side on the same side as the hand being tested. The dominant hand will tested first. Subjects completed one practice trial followed by the actual timed test for each hand

    Time frame: at baseline and after 4th week

07

Study locations

1 site
08

References and documents

Publications

  • Hu K, Wan R, Liu Y, Niu M, Guo J, Guo F. Effects of transcranial alternating current stimulation on motor performance and motor learning for healthy individuals: A systematic review and meta-analysis. Front Physiol. 2022 Nov 18;13:1064584. doi: 10.3389/fphys.2022.1064584. eCollection 2022. PubMed 36467691 ↗
  • Kim YJ, Ku J, Kim HJ, Im DJ, Lee HS, Han KA, Kang YJ. Randomized, sham controlled trial of transcranial direct current stimulation for painful diabetic polyneuropathy. Ann Rehabil Med. 2013 Dec;37(6):766-76. doi: 10.5535/arm.2013.37.6.766. Epub 2013 Dec 23. PubMed 24466511 ↗

Related links

Individual participant data

Plan to share: Yes — The results data collected , de-identified individual participant data will be shared.

Supporting information: Study protocol, Statistical analysis plan, Informed consent form

Time frame: 6 months after the publication of the manuscript.

Access criteria: The data can be requested from the corresponding author.

09

Updates

2 registry updates since Sep 25, 2026
Eligibility
1 inclusion criterion edited, 6 added; 1 exclusion criterion edited, 6 added, 1 removed
What changed in the criteria
Inclusion criteria
  • AddedAge 45 to 70 years ,
  • AddedBoth Gender male and female
  • AddedHbA1c (>6.5%)
  • AddedNeuropathic symptoms, Diabetic Neuropathic Questionnaire (DN-4= >4)
  • AddedVisual Analogue Scale VAS (4 or higher)
  • AddedStable chronic pain for at least 3 preceding months.
  • EditedAge 45 to 70 years , Both Gender male and female HbA1c (>6.5%) Neuropathic symptoms, Diabetic Neuropathic Questionnaire (DN-4= >4) Visual Analogue Scale VAS (4 or higher) Stable chronic pain for atleast 3 preceding months. Persistent pain after taking medications, such as non-steroidal anti-inflammatory drugs, tramadol, antidepressants, antiepileptic drugs, or opioids.
Exclusion criteria
  • AddedAny uncontrolled clinical disease (as evaluated by each patient's clinician), such as thyroid, cardiovascular, pulmonary, haematological, pulmonary, or renal disease or psychiatric disorder
  • Addedhistory of substance abuse or neuropsychiatric comorbidity
  • Addedimplanted devices for pain control, such as vagal or deep brain stimulators
  • EditedAny uncontrolled clinical disease (as evaluated by each patient's clinician), such as thyroid, cardiovascular, pulmonary, hematological, pulmonary, or renal disease or psychiatric disorder history of substance abuse or neuropsychiatric comorbidity implanted devices for pain control, such as vagal or deep brain stimulators Pain attributable to other causes, such as spinal stenosis, peripheral blood vessel disease, lower extremity edema-related pain, and neuropathic pain due to a brain lesion or peripheral nerve injury, Contraindication for tDCS, such as an intracranial or orbital metallic implant or pacemaker alcoholism dizziness and amputation
  • Removed-
  • AddedContraindication for tDCS, such as an intracranial or orbital metallic implant or pacemaker
  • Addedalcoholism
  • Addeddizziness and amputation
Nov 3, 2026
Registered
First appeared on the registry
Oct 29, 2026
Show all 2 updates
  1. Nov 3, 2026
    Eligibility 1 inclusion criterion edited, 6 added; 1 exclusion criterion edited, 6 added, 1 removed
    What changed in the criteria
    Inclusion criteria
    • AddedAge 45 to 70 years ,
    • AddedBoth Gender male and female
    • AddedHbA1c (>6.5%)
    • AddedNeuropathic symptoms, Diabetic Neuropathic Questionnaire (DN-4= >4)
    • AddedVisual Analogue Scale VAS (4 or higher)
    • AddedStable chronic pain for at least 3 preceding months.
    • EditedAge 45 to 70 years , Both Gender male and female HbA1c (>6.5%) Neuropathic symptoms, Diabetic Neuropathic Questionnaire (DN-4= >4) Visual Analogue Scale VAS (4 or higher) Stable chronic pain for atleast 3 preceding months. Persistent pain after taking medications, such as non-steroidal anti-inflammatory drugs, tramadol, antidepressants, antiepileptic drugs, or opioids.
    Exclusion criteria
    • AddedAny uncontrolled clinical disease (as evaluated by each patient's clinician), such as thyroid, cardiovascular, pulmonary, haematological, pulmonary, or renal disease or psychiatric disorder
    • Addedhistory of substance abuse or neuropsychiatric comorbidity
    • Addedimplanted devices for pain control, such as vagal or deep brain stimulators
    • EditedAny uncontrolled clinical disease (as evaluated by each patient's clinician), such as thyroid, cardiovascular, pulmonary, hematological, pulmonary, or renal disease or psychiatric disorder history of substance abuse or neuropsychiatric comorbidity implanted devices for pain control, such as vagal or deep brain stimulators Pain attributable to other causes, such as spinal stenosis, peripheral blood vessel disease, lower extremity edema-related pain, and neuropathic pain due to a brain lesion or peripheral nerve injury, Contraindication for tDCS, such as an intracranial or orbital metallic implant or pacemaker alcoholism dizziness and amputation
    • Removed-
    • AddedContraindication for tDCS, such as an intracranial or orbital metallic implant or pacemaker
    • Addedalcoholism
    • Addeddizziness and amputation
    + 1 other change: verification date
  2. Oct 29, 2026
    First appeared on the registry

From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗

10

Registry details

Key details

Study ID
NCT07905729
Lead sponsor
University of Management and Technology Lahore
Responsible party
Zainab Hassan (Assistant Professor, University of Management and Technology Lahore) — Principal investigator
First posted
Oct 29, 2026
Start date
Oct 22, 2026
Primary completion
Dec 31, 2026 (estimated)
Completion
Dec 31, 2026 (estimated)
Last update
Nov 3, 2026

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

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