EMS Faradic Flashcards
What does EMS stand for?
Electrical Muscle Stimulation
What type of nerve cell is stimulated to create a contraction?
Motor nerve
What is the primary use of EMS?
To improve muscle tone, condition and to maintain muscle strength.
How are muscle contractions produced?
Electrical impulses stimulate the motor nerve to produce contraction of the muscle.
What type of current is used ?
Interrupted direct current
Describe the structure of skeletal muscle;
Skeletal muscle is composed of long, thin, multinucleated cells called muscle fibres. Muscle fibres groups together to form muscle bundles, any many bundles make up a complete muscle.
What proteins are found in muscle fibres?
Actin and myosin
What do muscle fibres look like under a microscope?
Light and dark bands are seen along the fibre; these are known as A and I bands composed of actin and myosin proteins.
What role do the A and I bands play in muscle contraction?
These bands move into each other to create a contraction.
What structure of the nervous system controls the voluntary action of muscles?
PNS Peripheral nervous system
Briefly explain voluntary muscle action:
Brain impluses transmitted via the spinal corn and peripheral motor nerves to muscle fibres, causing them to contract.
What frequency would be used to stimulate facial muscles?
135Hz
What is the name of the two phases used with EMS?
Biphasic and Monophasic
What is monophasic current?
With monophasic current, the currrent flows mainly in one direction from negative (Cathode) to the positive (Anode).
What is biphasic current?
Each alternate pulse is reversed and polarity is cancelled out, therfore, even contractins are produced under each electrode.