Effects of Transcutaneous Electrical Nerve Stimulation on Cognitive Function and Upper Limb Motor Function in People With Chronic Stroke

NCT ID: NCT05615610

Last Updated: 2025-08-20

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

NA

Total Enrollment

90 participants

Study Classification

INTERVENTIONAL

Study Start Date

2023-11-01

Study Completion Date

2025-12-15

Brief Summary

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Upper limb impairment is present in more than 85% of people with stroke, which greatly affect the quality of life, social participation, and performance of daily activities of people with stroke. Previous study also revealed that 53.4% of people after stroke experienced cognitive impairment. Different cognitive domains might be affected following stroke, such as attention, memory, language, and orientation, and the problems with memory are often prominent. Yet, there is no effective treatment for the post-stroke cognitive impairment.

Transcutaneous spinal cord stimulation (tSCS) and transcutaneous vagus nerve stimulation (tVNS) are simple and non-invasive treatment to improve upper limb motor function and cognitive function. However, no existing studies have explored on the effects of tSCS and tVNS on cognitive function in people with stroke. Therefore, the purpose of this study is to evaluate the effectiveness of transcutaneous electrical nerve stimulation (TENS) on improving upper limb function and cognitive function in people with chronic stroke.

Detailed Description

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This study aims to investigate the effects of three intervention protocols in people with stroke. The participants in Group A will receive tSCS on C6 and T5 level of the spine with upper limb exercises. The participants in Group B will receive tVNS on the cymba conchae of left outer ear with upper limb exercises. The participants in Group C will receive placebo stimulation with upper limb exercises.

Conditions

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Chronic Stroke

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

SINGLE

Outcome Assessors

Study Groups

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tSCS

The participants will be received eighteen 45-minute sessions of intervention, 3 sessions per week for 6 weeks.

Group Type EXPERIMENTAL

tSCS

Intervention Type DEVICE

The participants in Group A will receive tSCS (Burst mode, 9 pulses per burst, pulse frequency = 160 Hz, burst frequency = 2 Hz) with upper limb exercises. The electrical stimulation will be generated by the neurostimulator (MH8000P; MEDIHIGHTEC MEDICAL CO., LTD., Taiwan). Two 7.5 × 12.6 cm electrodes will be attached between C6 and T5 level on each side of spinal column and with 2 cm from the spine. Intensity of TENS will be individually selected by the participants according to tolerance levels.

tVNS

The participants will be received eighteen 45-minute sessions of intervention, 3 sessions per week for 6 weeks.

Group Type EXPERIMENTAL

tVNS

Intervention Type DEVICE

The participants in Group B will receive tVNS (pulse frequency = 25Hz, pulse duration = 0.3 ms) on the cymba conchae of left outer ear with upper limb exercises.The electrical stimulation will be generated by the neurostimulator (MH8000P; MEDIHIGHTEC MEDICAL CO., LTD., Taiwan). Intensity of tVNS will be individually selected by the participants according to tolerance levels. Previous studies showed that it was effective to improve the upper limb motor function in people with stroke and cognitive function in people with mild cognitive function.

Control

The participants will be received eighteen 45-minute sessions of intervention, 3 sessions per week for 6 weeks.

Group Type PLACEBO_COMPARATOR

Control

Intervention Type DEVICE

The participants in Group C will receive placebo tSCS and tVNS with upper limb exercises, where the stimulation will be delivered by placebo-TENS device with disconnected electrical circuit.

Interventions

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tSCS

The participants in Group A will receive tSCS (Burst mode, 9 pulses per burst, pulse frequency = 160 Hz, burst frequency = 2 Hz) with upper limb exercises. The electrical stimulation will be generated by the neurostimulator (MH8000P; MEDIHIGHTEC MEDICAL CO., LTD., Taiwan). Two 7.5 × 12.6 cm electrodes will be attached between C6 and T5 level on each side of spinal column and with 2 cm from the spine. Intensity of TENS will be individually selected by the participants according to tolerance levels.

Intervention Type DEVICE

tVNS

The participants in Group B will receive tVNS (pulse frequency = 25Hz, pulse duration = 0.3 ms) on the cymba conchae of left outer ear with upper limb exercises.The electrical stimulation will be generated by the neurostimulator (MH8000P; MEDIHIGHTEC MEDICAL CO., LTD., Taiwan). Intensity of tVNS will be individually selected by the participants according to tolerance levels. Previous studies showed that it was effective to improve the upper limb motor function in people with stroke and cognitive function in people with mild cognitive function.

Intervention Type DEVICE

Control

The participants in Group C will receive placebo tSCS and tVNS with upper limb exercises, where the stimulation will be delivered by placebo-TENS device with disconnected electrical circuit.

Intervention Type DEVICE

Eligibility Criteria

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Inclusion Criteria

1. aged between 50 and 80;
2. have suffered from a single stroke at least 6 months;
3. had volitional control of the non-paretic arm and at least minimal antigravity movement in the paretic shoulder;

Exclusion Criteria

1. have cardiac pacemaker or cochlear implant;
2. have other neurological diseases;
3. are taking medication that may affect measured outcomes;
4. have skin lesions, infection, or inflammation near selected position;
5. are participating in other drug/treatment programs.
Minimum Eligible Age

50 Years

Maximum Eligible Age

80 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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The Hong Kong Polytechnic University

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Shamay NG, PhD

Role: PRINCIPAL_INVESTIGATOR

The Hong Kong Polytechnic University

Locations

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The Hong Kong Polytechnic University

Hong Kong, , Hong Kong

Site Status RECRUITING

Countries

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Hong Kong

Central Contacts

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Shamay NG, PhD

Role: CONTACT

+852 27664889

Facility Contacts

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Shamay Ng, PhD

Role: primary

References

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Other Identifiers

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2022_TVNS_STROKE

Identifier Type: -

Identifier Source: org_study_id

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