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PTAS 201 exam 2

PTAS 201 review guide exam 2

Electric current Movement of charged particles through a material
Ampere Measurement of electric current
Volt The electromotive force or pressure sued to produce a flow of electrons
Resistance Ease or difficulty of electron flow through a circuit
Ohm's Law I =V/R; voltage is proportional to current and inversely proportional to resistance
Conductors Substances that lead of electric charge quickly
Non-conductors Substances that prevent the escape of electric charge
Semiconductors Substances that allow some flow of electricity under certain conditions
Capacitor Device for storing electricity
Capacitance Ability to store charge in an electric field
Joule's Law Electric currents cause a rise of temperature in a conductor due to the conversion of electrical energy
Anode Positive pole
Cathode Negative pole
Circuit Path of current from a generating force through various conductors back to the generating source
Series circuit Same amount of resistance
Parallel circuit Resistance is split
Direct current Current flows in one direction
Alternating current Polarity switches from negative to positive and vice versa
Monophasic current Direct current
Biphasic current Alternating current
Polyphasic current 3 or more phases (Russian, interferential)
Tetanus Sustained contraction caused by frequencies above 30 cycles per second
Twitch contraction Single contraction caused by frequencies below 30 cycles per second
High voltage galvanic stimulation Twin spikes of DC current used to treat edema
Interferential stimulation Crossing of 2 pathways through the same stimulator that cause greater depth and greater comfort for pain relief
Russian stimulation High cycle and pulse rate with 10 second on time and 50 second off time for strengthening
Strength duration curve Curve that shows the relationship between the stimulus intensity and the amount of time it is applied
Rheobase Least amount of current necessary to elicit a contraction
Chronaxy The duration required for a stimulus twice the rheobase intensity to elicit a minimally visible contraction
UE nerve velocity 45 to 65 meters per second
Accomodation Phenomenon of normal nervous tissue but not of muscle tissue; use DC continuously on normal nerve and contraction will die out
Pain Multidimensional phenomenon that is caused by actual or threatened damages to tissue
Acute pain Pain of less than 6 months duration; pain that has an immediate onset and resolves
Chronic pain Pain that persists 3-6 months beyond the usual course of the disease
Referred pain Deep pain that arise from the disease of the viscera
Phantom pain Pain in limb that has been amputated
CRPS Complex regional pain syndrome due to overactivation of the sympathetic nervous system
Nociceptor Free nerve ending that respond to pain
A-Delta Myelinated nerves that transmit pain quickly
C-Fibers Small nerves that transmit pain slowly
TENS Transcutaneous electrical nerve stimulation; device used to manage pain
Conventional TENS Submotor response with 100-150 pulse frequency and 50-80 pulse duration; works with Gate Theory
Low frequency TENS Motor response with 2-10 pulse frequency and 200-300 pulse duration; works with chemical release theory
Functions of skin Protection, sensation, regulation, identity, personal appearance, vit D production
Epidermis Outer layer of skin
Dermis Inner layer of skin; where hair follicles and sweat glands are found
Normal healing Inflammation, proliferative phase, remodeling or maturation phase
Primary healing Edges of wound close together with minor tissue lose
Secondary healing Large wounds with substantial tissue loss
Maceration Softening of skin around the wound
Induration Hardening of skin around an ulcer
Indolent Long standing, slow healing wound
Created by: woblevalenski