Term
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Definition
| the all-or-none electrical response conducted by a nerve or muscle fire upon depolarization. |
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Term
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Definition
| the process by which a nerve adapts itself to a stimulus. threshold of excitation increases as stimulus continues. |
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Definition
| the stimulating electrode which is placed directly in the treatment area. may be smaller in size than the indifferent electrode or both may be the same size |
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Definition
| sensory nerve fiber that transmits impulses from the periphery towards the CNS. |
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Definition
| Faradic current. current whose direction alternates. |
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Term
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Definition
| applies to the depolarization of the nerve cell membrane. once the action potential has begun, it will spread throughout the cell. |
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Definition
| instrument calibrated to read in amperes. |
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Term
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Definition
| unit of measure of the amount of electrical current that flows past a certain point in one second. |
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Term
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Definition
| intensity or strength of current flowing. maximum deviation from zero. |
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Definition
| + pole or electrode of an electrical device using direct current. usually red. |
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Term
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Definition
| the smallest particle of an element. composed of protons, neutrons and electrons. |
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Term
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Definition
| a waveform that has 2 phases. one + and one -. waveform that is both above and below the line. |
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Term
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Definition
| electrode placement where both electrodes are placed in the treatment area, both electrodes are the same size, both considered active electrodes. used for stimulating muscles to produce a contraction. |
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Term
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Definition
| - pole or electrode of an electical device using DC. |
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Term
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Definition
| minimal duration of a stimulus necessary to produce a mimimal response at an intensity twice that of the rheobase. |
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Term
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Definition
| conductor forms pathway between - & + potential thereby allowing current flow. |
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Term
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Definition
| electric conduction ability of a substance. |
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Term
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Definition
| flow of charged electrons or ions through a conductor. measured in amperes. |
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Term
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Definition
| amount of current flow per unit area. depending on intensity applied, electrode size, and electrode placement. |
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Term
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Definition
| on period of alternating current. 0 to + back to 0 to - and back to 0. |
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Term
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Definition
| reduction of a voltage difference across a membrane which elicits an action potential. |
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Term
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Definition
| Galvanic current.current that flows in one direction only. |
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Term
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Definition
| motor nerve transmits impulses from CNS toward the periphery. |
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Term
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Definition
| path followed by an electric current as it flows through conductors. |
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Term
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Definition
| phenomena associated with static charges and moving streams of charge ( current electricity). associated with existence of electrical charge. |
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Term
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Definition
| a medium intervening between an electric conductor and the object to which the current is to be applied. |
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Term
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Definition
| treatment of injury, disease, pain, or dysfunction by means of electricity. |
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Term
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Definition
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Term
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Definition
| the number of complete cycles per second in an alternating current. measured in Hertz or CPS |
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Term
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Definition
| a steady unidirectional current. DC |
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Term
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Definition
| an electrical connection with the earth or with any conductor of large capacity. |
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Term
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Definition
| a unit of frequency representing CPS. |
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Term
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Definition
| may be larger that active electrode. also called dispersive electrode. used to complete circuit so that current will flow. |
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Term
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Definition
| substance that does no easily conduct electricity. |
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Term
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Definition
| electrotherapy in which two medium frequency alternating currents of slightly different frequencies are applied to the body in such a way that they cross and "interfere" with one another to produce a low frequency current in the treatment area. |
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Term
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Definition
| mechanical or electronic device for making and breaking an electrical circuit. |
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Term
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Definition
| an atom or molecule that has either gained or lost an electron and is electrically charged. |
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Term
| Ion transfer (iontophoresis) |
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Definition
| the introducion of chemical ions into the tissues through the skin for medicinal purposes by the use of an electric current. (direct current) |
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Term
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Definition
| a chemical combination of two or more atoms that form a specific chemical substance. |
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Term
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Definition
| waveform with only one phase, either + or -. the waveform occurs above the line only. |
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Term
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Definition
| a point on the skin that overlies the place on a muscle where the concentration of motor nerve fibers entering motor end plates is greatest. |
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Term
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Definition
| The electrical charge carried by a body which has an excess of electrons. |
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Term
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Definition
| an uncharged particle present in all atomic nuclei except the hydrogen nucleus. |
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Term
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Definition
| a substance that will not readily conduct electricity. also call an insulator. |
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Term
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Definition
| the unit of electrical resistance. |
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Term
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Definition
| the law that relates three fundamental properties of an electric current. it states that current intensity is directly proportional to EMF. and inversely proportional to resistance.I=E/R |
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Term
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Definition
| a circuit having some break in it so that current is not passing or cannot pass. the break may be intentional, as an open switch, or accidental such as when the electrode falls of or becomes unplugged. |
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Term
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Definition
| one cycle of alternating current.0 to + back to 0 to - and back to 0. |
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Term
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Definition
| that portion of a wave (or cycle) which rises to maximum (+ or -) and returns to baseline. |
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Term
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Definition
| the property or condition of having two oppositley charged poles |
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Term
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Definition
| the exhibition of opposite (+ or -) effects at the two poles. changes that occur in the body tissues due to the effect of polarity. |
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Term
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Definition
| the separation of charges by a membrane; its resting state. |
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Term
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Definition
| the electrical charge carried by a body that has become deficient in electrons. |
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Term
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Definition
| the amount of charge held by a body as compared to another point or body measured in volts. |
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Term
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Definition
| a particle in the nucleus of an atom that carries the unit positive charge of electricity. |
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Term
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Definition
| D.C or A.C. flow of charged particles that ceases after each pulse for a finite length of time. also called pulsed current or interrupted current. |
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Term
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Definition
the time from the beginning of a response in excitable tissue until a new response can be excited.
when he Na+ and K+ "pump" must reset itself. The nerve is less likely to respond. |
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Term
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Definition
| the restoration of a membrane to its resting state or electrical potential. |
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Term
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Definition
| the oppositon of a body to passage of an electric current. expressed in ohms. |
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Term
| resting membrane potential |
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Definition
| when a nerve fiber is in its resting state, there is a differnce in poetential between the outer and inner surface of the cell: the outer surface has a positive charge and the inner surface has a negative charge. |
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Term
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Definition
| the minimum current intenstiy of infinite duration necessary to produce a minimally visible muscle contraction. |
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Term
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Definition
| an alternating current following the sine law. |
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Term
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Definition
| electricity produced by friction. electrons or ions that are not moving |
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Term
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Definition
| a graph showing the relationship between the intensity of a stimulus and the duration of that stimulus. |
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Term
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Definition
| sustained muscle contraction in response to repetitive electrical stimuli of greater than 50 pps |
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Term
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Definition
| that point in electrically excitable tissue above which a response will occur and below which no response will occur. |
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