Microcurrent electrical neuromuscular stimulator

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A microcurrent electrical neuromuscular stimulator or MENS (also microamperage electrical neuromuscular stimulator) is a device used to send weak electrical signals into the body. Such devices apply extremely small microamp [uA] electrical currents (less than 1 milliampere [mA]) to the tissues using electrodes placed on the skin. One microampere [uA] is 1 millionth of an ampere and the uses of MENS are distinct from those of "TENS" which runs at one milliamp [mA] or one thousandth of an amp.

Contents

Uses

MENS uses include treatments for pain, [1] diabetic neuropathy, [2] age-related macular degeneration, wound healing, tendon repair, plantar fasciitis [3] and ruptured ligament recovery. Most microcurrent treatments concentrate on pain and/or speeding healing and recovery. [4] It is commonly used by professional and performance athletes with acute pain and/or muscle tenderness as it is drug-free and non-invasive, thus avoiding testing and recovery issues. It is also used as a cosmetic treatment. [5]

History

The body's electrical capabilities were studied at least as early as 1830, when the Italian Carlo Matteucci is credited as being one of the first to measure the electrical current in injured tissue. Bioelectricity received less attention after the discovery of penicillin, when the focus of medical research and treatments turned toward the body's chemical processes. [6] Attention began to return to these properties and the possibilities of using very low current for healing in the mid-1900s. In a study published in 1969, for example, a team of researchers led by L.E. Wolcott applied microcurrent to a wide variety of wounds, using negative polarity over lesions in the initial phase, and then alternating application of positive and negative electrodes every three days. The stimulation current ranged from 200 to 800 uA and the treated group showed 200%-350% faster healing rates, with stronger tensile strength of scar tissue and antibacterial effects. [7]

In 1991, the German scientists Drs. Erwin Neher and Bert Sakmann shared the Nobel Prize in Physiology or Medicine for their development of the patch-clamp technique that allows the detection of minute electrical currents through cell membranes. This method allowed the detection of more than 20 different types of ion channel which permit positive or negatively charged ions to cross the cell membrane, confirming that cellular electrical activity is not limited only to nerve and muscle tissues.[ citation needed ]

Efficacy

A study by a neuroretinologist in the late 1980s suggested that microcurrent stimulation of acupuncture points for the eye had positive effects in slowing and even stopping progression of macular degeneration.[ citation needed ] This treatment is used to treat both the Wet and Dry forms of AMD. This study was based on Ngok Cheng's research on the increased amounts of ATP levels in living tissue after being stimulated with microcurrent. [8]

Mechanisms of action

While the mechanisms of efficacy are not well established, a few studies have shown that there may be a correlation between the traditional Chinese medical system of acupuncture and microcurrent. A study published in 1975 by Reichmanis, Marino, and Becker concluded in part that. "At most acupuncture points on most subjects, there were greater electrical conductance maxims than at control sites." [9]

Manufacturers

Many companies manufacture microcurrent devices for both professional and personal use, [10] [ citation needed ] [11] [12] and microcurrent stimulation is used as a "complementary" veterinary modality. [13]

See also

Related Research Articles

Diabetic neuropathy is various types of nerve damage associated with diabetes mellitus. Symptoms depend on the site of nerve damage and can include motor changes such as weakness; sensory symptoms such as numbness, tingling, or pain; or autonomic changes such as urinary symptoms. These changes are thought to result from a microvascular injury involving small blood vessels that supply nerves. Relatively common conditions which may be associated with diabetic neuropathy include distal symmetric polyneuropathy; third, fourth, or sixth cranial nerve palsy; mononeuropathy; mononeuropathy multiplex; diabetic amyotrophy; and autonomic neuropathy.

<span class="mw-page-title-main">Transcutaneous electrical nerve stimulation</span> Therapeutic technique

A transcutaneous electrical nerve stimulation is a device that produces mild electric current to stimulate the nerves for therapeutic purposes. TENS, by definition, covers the complete range of transcutaneously applied currents used for nerve excitation, but the term is often used with a more restrictive intent—namely, to describe the kind of pulses produced by portable stimulators used to reduce pain. The unit is usually connected to the skin using two or more electrodes which are typically conductive gel pads. A typical battery-operated TENS unit is able to modulate pulse width, frequency, and intensity. Generally, TENS is applied at high frequency (>50 Hz) with an intensity below motor contraction or low frequency (<10 Hz) with an intensity that produces motor contraction. More recently, many TENS units use a mixed frequency mode which alleviates tolerance to repeated use. Intensity of stimulation should be strong but comfortable with greater intensities, regardless of frequency, producing the greatest analgesia. While the use of TENS has proved effective in clinical studies, there is controversy over which conditions the device should be used to treat.

<span class="mw-page-title-main">Functional electrical stimulation</span> Technique that uses low-energy electrical pulses

Functional electrical stimulation (FES) is a technique that uses low-energy electrical pulses to artificially generate body movements in individuals who have been paralyzed due to injury to the central nervous system. More specifically, FES can be used to generate muscle contraction in otherwise paralyzed limbs to produce functions such as grasping, walking, bladder voiding and standing. This technology was originally used to develop neuroprostheses that were implemented to permanently substitute impaired functions in individuals with spinal cord injury (SCI), head injury, stroke and other neurological disorders. In other words, a person would use the device each time he or she wanted to generate a desired function. FES is sometimes also referred to as neuromuscular electrical stimulation (NMES).

<span class="mw-page-title-main">Plantar fasciitis</span> Connective tissue disorder of the heel

Plantar fasciitis or plantar heel pain is a disorder of the plantar fascia, which is the connective tissue which supports the arch of the foot. It results in pain in the heel and bottom of the foot that is usually most severe with the first steps of the day or following a period of rest. Pain is also frequently brought on by bending the foot and toes up towards the shin. The pain typically comes on gradually, and it affects both feet in about one-third of cases.

Electroacupuncture is a form of acupuncture where a small electric current is passed between pairs of acupuncture needles.

<span class="mw-page-title-main">Electromyography</span> Electrodiagnostic medicine technique

Electromyography (EMG) is a technique for evaluating and recording the electrical activity produced by skeletal muscles. EMG is performed using an instrument called an electromyograph to produce a record called an electromyogram. An electromyograph detects the electric potential generated by muscle cells when these cells are electrically or neurologically activated. The signals can be analyzed to detect abnormalities, activation level, or recruitment order, or to analyze the biomechanics of human or animal movement. Needle EMG is an electrodiagnostic medicine technique commonly used by neurologists. Surface EMG is a non-medical procedure used to assess muscle activation by several professionals, including physiotherapists, kinesiologists and biomedical engineers. In computer science, EMG is also used as middleware in gesture recognition towards allowing the input of physical action to a computer as a form of human-computer interaction.

<span class="mw-page-title-main">Electrotherapy</span> Use of electricity for medical purposes

Electrotherapy is the use of electrical energy as a medical treatment. In medicine, the term electrotherapy can apply to a variety of treatments, including the use of electrical devices such as deep brain stimulators for neurological disease. The term has also been applied specifically to the use of electric current to speed wound healing. Additionally, the term "electrotherapy" or "electromagnetic therapy" has also been applied to a range of alternative medical devices and treatments.

<span class="mw-page-title-main">Nerve conduction study</span> Diagnostic test for nerve function

A nerve conduction study (NCS) is a medical diagnostic test commonly used to evaluate the function, especially the ability of electrical conduction, of the motor and sensory nerves of the human body. These tests may be performed by medical specialists such as clinical neurophysiologists, physical therapists, physiatrists, and neurologists who subspecialize in electrodiagnostic medicine. In the United States, neurologists and physiatrists receive training in electrodiagnostic medicine as part of residency training and in some cases acquire additional expertise during a fellowship in clinical neurophysiology, electrodiagnostic medicine, or neuromuscular medicine. Outside the US, clinical neurophysiologists learn needle EMG and NCS testing.

Dry needling, also known as trigger point dry needling and intramuscular stimulation, is a treatment technique used by various healthcare practitioners, including physical therapists, physicians, and chiropractors, among others. Acupuncturists usually maintain that dry needling is adapted from acupuncture, but others consider dry needling as a variation of trigger point injections. It involves the use of either solid filiform needles or hollow-core hypodermic needles for therapy of muscle pain, including pain related to myofascial pain syndrome. Dry needling is mainly used to treat myofascial trigger points, but it is also used to target connective tissue, neural ailments, and muscular ailments. The American Physical Therapy Association defines dry needling as a technique used to treat dysfunction of skeletal muscle and connective tissue, minimize pain, and improve or regulate structural or functional damage.

<span class="mw-page-title-main">Extracorporeal shockwave therapy</span> Ultrasonic, non-invasive, outpatient treatment

Extracorporeal shockwave therapy (ESWT) is a treatment using powerful acoustic pulses which is mostly used to treat kidney stones and in physical therapy and orthopedics.

Synkinesis is a neurological symptom in which a voluntary muscle movement causes the simultaneous involuntary contraction of other muscles. An example might be smiling inducing an involuntary contraction of the eye muscles, causing a person to squint when smiling. Facial and extraocular muscles are affected most often; in rare cases, a person's hands might perform mirror movements.

<span class="mw-page-title-main">Hereditary motor and sensory neuropathy</span> Medical condition

Hereditary motor and sensory neuropathies (HMSN) is a name sometimes given to a group of different neuropathies which are all characterized by their impact upon both afferent and efferent neural communication. HMSN are characterised by atypical neural development and degradation of neural tissue. The two common forms of HMSN are either hypertrophic demyelinated nerves or complete atrophy of neural tissue. Hypertrophic condition causes neural stiffness and a demyelination of nerves in the peripheral nervous system, and atrophy causes the breakdown of axons and neural cell bodies. In these disorders, a patient experiences progressive muscle atrophy and sensory neuropathy of the extremities.

<span class="mw-page-title-main">Low-level laser therapy</span> Treatment using irradiation with light of low power intensity

Low-level laser therapy (LLLT), cold laser therapy, photobiomodulation (PBM) or red light therapy is a form of medicine that applies low-level (low-power) lasers or light-emitting diodes (LEDs) to the surface of the body. Whereas high-power lasers are used in laser medicine to cut or destroy tissue, it is claimed that application of low-power lasers relieves pain or stimulates and enhances cell function. The effects appear to be limited to a specified set of wavelengths and new research has demonstrated effectiveness at myopia control. Several such devices are cleared by the United States Food and Drug Administration (FDA), and research shows potential for treating a range of medical problems including rheumatoid arthritis and oral mucositis.

Electroanalgesia is a form of analgesia, or pain relief, that uses electricity to ease pain. Electrical devices can be internal or external, at the site of pain (local) or delocalized throughout the whole body. It works by interfering with the electric currents of pain signals, inhibiting them from reaching the brain and inducing a response; different from traditional analgesics, such as opiates which mimic natural endorphins and NSAIDs that help relieve inflammation and stop pain at the source. Electroanalgesia has a lower addictive potential and poses less health threats to the general public, but can cause serious health problems, even death, in people with other electrical devices such as pacemakers or internal hearing aids, or with heart problems.

<span class="mw-page-title-main">Electrotherapy (cosmetic)</span>

Cosmetic electrotherapy is a range of beauty treatments that uses low electric currents passed through the skin to produce several therapeutic effects such as muscle toning in the body and micro-lifting of the face. It is based on electrotherapy, which has been researched and accepted in the field of rehabilitation, though the "scientific and medical communities have tended to sideline or dismiss the use of electrotherapy for healthy muscles".

Dentomandibular sensorimotor dysfunction (DMSD) is a medical condition involving the mandible, upper three cervical (neck) vertebrae, and the surrounding muscle and nerve areas.

Neuromodulation is "the alteration of nerve activity through targeted delivery of a stimulus, such as electrical stimulation or chemical agents, to specific neurological sites in the body". It is carried out to normalize – or modulate – nervous tissue function. Neuromodulation is an evolving therapy that can involve a range of electromagnetic stimuli such as a magnetic field (rTMS), an electric current, or a drug instilled directly in the subdural space. Emerging applications involve targeted introduction of genes or gene regulators and light (optogenetics), and by 2014, these had been at minimum demonstrated in mammalian models, or first-in-human data had been acquired. The most clinical experience has been with electrical stimulation.

Scrambler therapy involves the use of electronic stimulation on the skin with the goal of overwhelming pain information with non-pain information. In a therapy session, "electrocardiographic-like pads are placed around the area of pain".

<span class="mw-page-title-main">Radiation-induced lumbar plexopathy</span> Type of nerve damage

Radiation-induced lumbar plexopathy (RILP) or radiation-induced lumbosacral plexopathy (RILSP) is nerve damage in the pelvis and lower spine area caused by therapeutic radiation treatments. RILP is a rare side effect of external beam radiation therapy and both interstitial and intracavity brachytherapy radiation implants.

Peripheral mononeuropathy is a nerve related disease where a single nerve, that is used to transport messages from the brain to the peripheral body, is diseased or damaged. Peripheral neuropathy is a general term that indicates any disorder of the peripheral nervous system. The name of the disorder itself can be broken down in order to understand this better; peripheral: in regard to peripheral neuropathy, refers to outside of the brain and spinal cord; neuro: means nerve related; -pathy; means disease. Peripheral mononeuropathy is a disorder that links to Peripheral Neuropathy, as it only effects a single peripheral nerve rather than several damaged or diseased nerves throughout the body. Healthy peripheral nerves are able to “carry messages from the brain and spinal cord to muscles, organs, and other body tissues”.

References

  1. McMakin, CR (April 2004). "Microcurrent Therapy: A novel treatment method for chronic low back myofascial pain" (PDF). Journal of Bodywork and Movement Therapies. 8 (2): 143–153. doi:10.1016/j.jbmt.2003.12.006. Archived from the original (PDF) on 2014-05-17.
  2. Park, RJ; Son, H; Kim, K; et al. (2011). "The Effect of Microcurrent Electrical Stimulation on the Foot Blood Circulation and Pain of Diabetic Neuropathy". Journal of Physical Therapy Science. 23 (3): 515–518. doi: 10.1589/jpts.23.515 .
  3. Cho, MS; Park, RJ; Park, SH; et al. (2007). "The effect of microcurrent-inducing shoes on fatigue and pain in middle-aged people with plantar fasciitis". Journal of Physical Therapy Science. 19 (2): 165–170. doi: 10.1589/jpts.19.165 .
  4. Lambert, MI; Marcus, P; Burgess T (April 2002). "Electro-membrane microcurrent therapy reduces signs and symptoms of muscle damage". Med Sci Sports Exerc. 34 (4): 602–607. doi: 10.1097/00005768-200204000-00007 . PMID   11932567.
  5. "What is the Difference Between Transcutaneous Electrical Nerve Stimulation (TENS) and Microcurrent Electrical Nerve Stimulation (MENS)".
  6. Robert O. Becker, M.D.; Gary Selden. The Body Electric: Electromagnetism And The Foundation of Life. pp. 17–21.
  7. Wolcott LE, Wheeler PC, Hardwicke HM, Rowley BA (1969). "Accelerated healing of skin ulcer by electrotherapy: preliminary clinical results". Southern Medical Journal. 62 (7): 795–801. doi:10.1097/00007611-196907000-00008. PMID   5306004.
  8. Cheng N, Van Hoof H, Bockx E, et al. (1982). "The effects of electric currents on ATP generation, protein synthesis, and membrane transport of rat skin". Clin. Orthop. Relat. Res. (171): 264–72. PMID   7140077.
  9. Reichmanis M, Marino AA, Becker RO (1975). "Electrical correlates of acupuncture points". IEEE Transactions on Biomedical Engineering. 22 (Nov, 22(6)): 533–5. doi:10.1109/tbme.1975.324477. PMID   1184029. S2CID   27966221.
  10. "Myotone | Microcurrent Facial Lifting, Toning, Wrinkle Reduction | Microcurrent, facial toning, wrinkle reduction and anti-aging device by Myotone. |". myotone.com. Retrieved 2018-12-12.
  11. "NuFACE: Microcurrent Facial Toning Devices". www.mynuface.com. Retrieved 2018-12-12.
  12. "Microcurrent and Anti-Shock System | FOREO". www.foreo.com. Retrieved 2023-11-09.
  13. Deborah Powell. MicroCurrent for Horses (and other vital therapies you should know). pp. 15–84.