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Definition
| The potential difference created when a pair of electrodes is in an electrolyte and one moves while the other remains stationary. |
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Definition
| Horney layer of dead material on the skin's surface. |
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Definition
| 2nd deepest layer of the skin. After leaving this layer, cells die. |
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Definition
| Deepest layer of the skin. Cells divide and grow here, and are pushed outward. |
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Term
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Definition
| A 2nd kind of electrode that has characteristics approaching those of the perfectly non-polarizable electrode. |
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Term
| Perfectly Nonpolarizable Electrodes |
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Definition
| Those in which current passes freely across the electrode-electrolyte interface, requiring no energy to make the transition. |
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Term
| Perfectly Polarizable Electrodes |
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Definition
| Those in which no actual charge crosses the electrode-electrolyte interface when a current is applied. |
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Term
| Liquid-Junction Potential |
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Definition
| A potential difference between two electrolyte solutions that have different ionic mobilities. |
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Term
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Definition
| The availability of an ionic species in solution to enter into a reaction. |
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Definition
| Difference in voltage between electrode and to electrolyte. |
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Term
| Concentration Overpotential |
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Definition
| Results from changes in the distribution of ions in the electrolyte in the vicinity of the electrode-electrolyte interface. |
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Definition
| A direct result of the resistance of the electrolyte. |
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Term
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Definition
| the difference between the observed half-cell potential and the equilibrium zero-current half-cell potential. |
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Term
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Definition
| A potential difference determined by the metal involved, the concentration of its ions in solution, and the temperature, as well as other 2nd order factors. |
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Definition
| Acceleration of heart rate. |
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Term
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Definition
| Natural slowing down of heart-rate. |
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Definition
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Definition
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Definition
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Definition
| A dense structure that make end-to-end contact with the plasma membrane. |
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Definition
| The contract-and-pump phase of the heart cycle. |
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Definition
| The resting of filling phase of the heart cycle. |
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Definition
| Specialized regions of the muscle fiber. |
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Term
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Definition
| Specialized length receptors. |
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Term
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Definition
| Consists of sketal muscle fibers that contract in response to the driving stimuli conducted by motor-nerve fibers. |
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Definition
| Serving as a communication link CNS and peripheral muscle. |
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Term
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Definition
| Contains many individual nerve fibers that performs the task of transmitting information(encoded in the form of action potential frequency) from a peripheral sense receptor to other cells lying within the central system(brain and spinal cord). |
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Term
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Definition
| Consisting of many individual sense receptors that respond preferentially to environmental stimulus of a particular kind, such as pressure, temperature, touch or pain. |
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Term
| Anisotropic Conducting Medium |
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Definition
| Specific resistivity different in each coordinate direction. |
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Term
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Definition
| Action potentials appear to leap from node to node. |
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Term
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Definition
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Term
| Relative Refractory Period |
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Definition
| Where in the action potential can be elicited by an intense super-threshold stimulus. |
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Term
| Absolute Refractory Period |
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Definition
| During the initial portion of action potential, the membrane cannot respond to any stimulus, no matter how intense. |
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Term
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Definition
| One that brings about the depolarization of a cell membrane that's sufficient to exceed its threshold potential and thereby elicit an all-or-none action potential, which travels in an unattenuated fashion and at a constant conduction velocity along the membrane. |
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Term
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Definition
| Transmembrane potential Vm is held at prescribed levels via a negative-feedback circuit. |
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Term
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Definition
| If the membrane potential threshold is exceeded and Vm tends to approach the equilibrium Nernst potential of sodium, Ena, which has a value of about +60mV. |
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Term
| Nernst Equation for Equilibrium Potential/Voltage |
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Definition
| Ek=(RT/nF)*ln([X]o/[X]i)=0.0615log([X]o/[X]i). |
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Term
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Definition
| Transmission time from stimulus to recording site. |
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Term
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Definition
| The voltage when activity is stimulated. |
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Term
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Definition
| Lies between -40 to -90mV, relative to the external medium. |
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Term
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Definition
| A class of cells that exhibit bioelectric potentials produced as a result of electrochemical activity. |
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Term
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Definition
| Noise sources of an op-amp Vn which cannot be reduced, but can be minimized by using small external resistances. |
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Term
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Definition
| The current tat's required to flow at all times in order to keep transistors on, since two op-amps drive the transistors. |
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Term
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Definition
Change in voltage across the capacitor:
dv/dt=Imax/C
fp=Sr/(2*pi*Vor), Sr=Slew rate, fp=max. frequency for full-power response. Vor=Rated output voltage usually 10V. |
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Term
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Definition
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Term
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Definition
| A method added to prevent Vo from fluctuating wildly due to noise in Vi(pertains to Op-amps). |
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Term
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Definition
| Detects an analog level and yields a logic level output. |
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Term
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Definition
| A high-gain DC differential amplifier. |
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Term
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Definition
| P=Xd1*Xd2=Xd1^2/Zx=Zx*Xd2^2 |
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Term
| Frequency Transfer Function |
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Definition
| Y(jw)/X(jw)=(bm(jw)^m+...b1(jw)+b0)/(an(jw)^n+...a1(jw)+a0) |
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Term
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Definition
| Yx=1/Zx, where Zx is the impedance for system x |
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Term
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Definition
| Expresses the maximum deviation of points from the least-squares fitted line as either +-A% of the reading or +-B% of full scale, whichever is greater(yields larger error). |
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Term
| Reproducibility/Repeatability |
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Definition
| The ability of an instrument to give the same output for equal inputs applied over some period of time. |
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Term
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Definition
| The smallest incremental quantity that can be measured with certainty. |
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Term
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Definition
| The number of distinguishable alternatives from which a given result is selected. |
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Term
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Definition
| A single measured quantity that distinguishes between the true value and the measured value divided by the true value. |
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Term
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Definition
| Require the use of differential and/or integral equations to describe the quality of the measurements. |
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Term
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Definition
| Describe the performance of instruments for DC or very low frequency inputs. |
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Term
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Definition
| Temperature-dependent resistors. |
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Term
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Definition
| A device or program that separates data, signals, or material in accordance with specified criteria. |
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Term
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Definition
| Undesired quantities that indirectly affect the output by altering the performance of the instrument itself. |
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Term
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Definition
| Quantities that inadvertently affect the instrument as a consequence of the principles used to acquire and process the desired inputs. |
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Term
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Definition
| The measurands that the instrument is designed to isolate. |
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Term
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Definition
| A device that converts one form of energy to another. |
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Term
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Definition
| Physical quantity, property, or condition that the system measures. |
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Term
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Definition
| A unit vecotr that defines the direction a constant-magnitude cardiac vector must have to generate maximum voltage in the particular pair of electrodes. |
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Term
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Definition
| A pair of electrodes, or a combo of several electrodes through a resistive network that gives a equivalent pair. |
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Term
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Definition
| The plane of your body that's parallel to the ground when you are lying on your back. |
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Term
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Definition
| The plane of your body that's parallel to the ground when you are standing erect. |
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Term
| High-Frequency Distortion |
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Definition
| Rounds off the sharp corners of the waveforms and diminishes the amplitude of the QRS complex. |
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Term
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Definition
| Between 1 to 150 HZ with the baseline no longer horizontal, especially immediately following any event in the tracing. |
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Term
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Definition
| Used between two machines are connected to the patient |
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Term
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Definition
| The line measurement of a pulse, wave, or signal from the body(usually the potential) |
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Term
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Definition
| Created as a result of the electric fields surrounding main power lines and the power cords connecting different pieces of apparatus to electric outlets. |
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Term
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Definition
| Originate from transformers and ballasts in fluorescent lights or electric appliances and other apparatuses. |
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Term
| Electromagnetic Interference |
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Definition
| Generates from nearby high-power radio, television, or radar facilities. |
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Term
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Definition
| Give a characteristic with a breakdown voltage of approximately 600mV. |
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Term
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Definition
| Diodes that can be biased in the forward or reverse direction. |
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