Using tDCS to Enhance Learning of a New Walking Pattern

NCT03582904 | Withdrawn

• 1 other identifier: 1240484
• Study Type: interventional
• Target: N/A
• Locations: 1 country
• Sites: 1

Brief Summary

The ability to change walking patterns is important for daily tasks such as stepping over an obstacle. This change of walking pattern can occur in a strategic manner, i.e., consciously making one step longer or shorter. Healthy individuals can learn a new walking pattern through perturbed visual feedback of their walking information (Kim et al., 2015; Kim et al., 2017). This type of learning is thought to largely involve explicit strategy. Transcranial direct current stimulation (tDCS) is a form of non-invasive brain stimulation that can enhance learning of some motor tasks (Reis et al., 2009), and primarily has been studied in the upper extremity. In locomotor learning, prior recent work by the investigators has suggested that tDCS does not affect non-strategy based locomotor learning, and the investigators speculate that tDCS may benefit learning of strategic tasks instead. The purpose of this study is to determine if tDCS can enhance learning and retention of a new walking pattern in a strategy-based, visually guided locomotor task in healthy individuals. Two groups of young, healthy participants will be recruited to learn a new walking pattern through perturbed visual feedback, with retention of learning tested on the second day. One group will receive tDCS, which is expected to enhance learning. The other group will receive placebo stimulation and serve as a control. Results from this work will provide information on which type of motor learning is sensitive to enhancement with tDCS, and may help pave the path for utilizing tDCS for neurorehabilitation.

Conditions

no Condition Being Studied; tDCS Only in Healthy Subjects

Keywords

motor learning; tDCS; locomotion

Outcome Measures

Primary Outcomes (2)

• Magnitude of Locomotor Learning

  Step length produced on the perturbed leg at the end of the learning period on study day 1 and subtracted from baseline (pre-learning period) step length

  study day 1

• Magnitude of Locomotor Learning Retention

  Step length produced on the perturbed leg on study day 2, normalized to the Magnitude of Locomotor Learning achieved on study day 1

  study day 2

Study Arms (2)

Real tDCS

EXPERIMENTAL

Anodal transcranial direct current stimulation (tDCS) targeting the primary motor cortex delivered via saline-soaked sponge electrodes (anode, 8 cm\^2; cathode 38.4 cm\^2) at an intensity of 1.5 milliamperes over \< 30 minutes.

Procedure: tDCS

Control

SHAM COMPARATOR

Anodal transcranial direct current stimulation (tDCS) targeting the primary motor cortex delivered via saline-soaked sponge electrodes (anode, 8 cm\^2; cathode 38.4 cm\^2) at an intensity of 1.5 milliamperes over 2 minutes.

Procedure: tDCS

Interventions

tDCS PROCEDURE

real or sham tDCS delivered to primary motor cortex

Control; Real tDCS

Eligibility Criteria

• Age: 18 Years - 40 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• Age 18-40 years
• Medically stable and generally healthy
• Able to walk on a treadmill without the use of handrails for 20 minutes at a speed of 1.0 m/s without rest
• Resting heart rate ≤100 beats per minute
• Resting blood pressure ≤140/90 mm Hg
• Willing and able to attend all testing sessions

You may not qualify if:

• Any chronic or recent medical conditions, including any musculoskeletal, cardiovascular, pulmonary, psychiatric or neurological diagnosis
• Any impaired sensation or weakness in either lower extremity
• History of serious traumatic head injury, defined as a loss of consciousness for more than 5 minutes and/or requiring medical treatment
• Any history of acute or chronic problems with balance or more than 1 fall in the last 12 months
• History of brain surgery
• Taking 4 or more medications
• Current or chronic pain located anywhere in the body
• History of seizures
• Currently pregnant (if a female of childbearing age)
• Currently taking any medications that act on the central nervous system
• Implanted pumps or stimulators above the shoulders
• Metal aneurysm, other metal surgical clip placement, or any other metal in the head, face, or neck, except for dental fillings

Sponsors & Collaborators

• University of Delaware: lead

Study Sites (1)

University of Delaware

Newark, Delaware, 19713, United States

Location

MeSH Terms

Interventions

Transcranial Direct Current Stimulation

Intervention Hierarchy (Ancestors)

Electric Stimulation Therapy; Therapeutics; Convulsive Therapy; Psychiatric Somatic Therapies; Behavioral Disciplines and Activities; Electroshock; Psychological Techniques

Study Officials

• Susanne M Morton, PhD, PT

  University of Delaware

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: PARTICIPANT
• Purpose: BASIC SCIENCE
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Associate Professor

Study Record Dates

• First Submitted: June 14, 2018
• First Posted: July 11, 2018
• Study Start: July 16, 2018
• Primary Completion: April 10, 2019
• Study Completion: April 10, 2019
• Last Updated: April 1, 2020

Record last verified: 2020-03

Data Sharing

• IPD Sharing: Will not share

Locations

US (1)