Effects of Ascending and Descending Direct Current on the Handgrip Strength

NCT03150823 | Completed DMC

• 1 other identifier: 6031205
• Study Type: interventional
• Target: 87
• Locations: 1 country
• Sites: 1

Brief Summary

Electrical stimulation currently has a wide range of clinical applications, being used for activities such as strengthening, pain control, edema management, or inflammation control after injury or surgery. One of the classic forms of electrotherapy is the Direct current (galvanic current), which stands out for its unique effects (polar and interpolar effects) and that are not achieved with other modalities of electrotherapy. Within these effects those activators or suppressors of nervous system activity are described. One of the applications of direct current is to produce sedation or excitation on the nervous system through longitudinal applications (longitudinal galvanization). This application technique is known as the upstream or downstream effect of the direct current or "Leduc Effect", in which it is postulated that an ascending type longitudinal galvanization has excitation effects of the central and / or peripheral nervous system. The study will evaluate the influence of the upward and downward direct current effect when performing a manual dynamometer test while monitoring by miofeedback in college students.

Conditions

Muscle Strength

Keywords

Direct current; Galvanic current; Handgrip Force; Palmar Grip; Dynamometry; Miofeedback

Outcome Measures

Primary Outcomes (2)

• Difference of Maximum handgrip force

  Comparing maximum handgrip strength pre and post application of upward and downward direct current intervention

  Baseline and 1 hours later (1 session of treatment), assessed as up to 1 month.

• Difference of Maximum Electromiographic Activation Threshold

  Comparing maximum Electromiographic Activation pre and post application of upward and downward direct current intervention

  Baseline and 1 hours later (1 session of treatment), assessed as up to 1 month.

Study Arms (3)

Upward Direct Current (Ascending Effect)

EXPERIMENTAL

Group subjected to a direct current application (Longitudinal Galvanization) in which the anode is placed at the distal level and the cathode at the proximal level. This would be an excitatory effect of the nervous system.

Procedure: Upward Direct Current (Ascending Effect)

Downward Direct Current (Descending Effect)

EXPERIMENTAL

Group subjected to a direct current application (Longitudinal Galvanization) in which the cathode is placed at the distal level and the anode at the proximal level. This would be an inhibitory effect of the nervous system.

Procedure: Downward Direct Current (Descending Effect)

Sham Direct Current

SHAM COMPARATOR

Group to which an electrical installation will be carried out without emission of part of the electrotherapy equipment. The electrodes will be applied longitudinally to the participants with the equipment switched off.

Procedure: Sham Direct Current

Interventions

Upward Direct Current (Ascending Effect) PROCEDURE

Application of direct current (Galvanic) in milliamperes current which varies according to the positioning of the electrodes. In the ascending stream direct current (Ascending effect) the proximal cathode and distal anode are placed, a excitatory effect on the nervous system being described in theory.

Upward Direct Current (Ascending Effect)

Downward Direct Current (Descending Effect) PROCEDURE

Application of direct current (Galvanic) in milliamperes current which varies according to the positioning of the electrodes. In the descending stream direct current (Descending effect) the proximal anode and distal cathode are placed, a sedative and analgesic effect on the nervous system being described in theory.

Downward Direct Current (Descending Effect)

Sham Direct Current PROCEDURE

Installation of electrotherapy equipment off (Sham tratment).

Sham Direct Current

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Students of the Faculty of Rehabilitation Sciences.
• Participants older than 18 years of age.
• Participants who do not show discomfort or pain when performing manual grip in the dominant hand.

You may not qualify if:

• Musculoskeletal pathologies of hand, wrist or elbow in the last 6 months.
• Materials of osteosynthesis or prosthesis in areas of application.
• Peripheral neurological pathologies such as or nerve compression cuts.
• Sensitivity alterations such as hypoesthesia, anesthesia or hyperesthesia in the upper limbs.
• Alterations in the skin of the application areas, such as burns, wounds, scars.
• Apprehension or fear of the application of electrotherapy.
• Non-completion of the evaluation / intervention protocol, designed for the study or abandonment of the same.

Sponsors & Collaborators

• Quiropraxia y Equilibrio: lead

Study Sites (1)

Universidad Andrés Bello

Santiago, Las Condes, 7591538, Chile

Location

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Study Officials

• Hernán Andrés A de la Barra Ortiz, Mg.

  Study Principal Investigator

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: TRIPLE
• Who Masked: PARTICIPANT, CARE PROVIDER, OUTCOMES ASSESSOR
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Principal Investigator and Clinical Professor

Study Record Dates

• First Submitted: May 9, 2017
• First Posted: May 12, 2017
• Study Start: June 26, 2017
• Primary Completion: August 26, 2017
• Study Completion: August 2, 2018
• Last Updated: September 12, 2018

Record last verified: 2018-08

Locations

CL (1)