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lab 4
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16
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Kindergarten
03/10/2014

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Term
what is on the x-axis
Definition
used to determine wave frequency, time is the measurement,seconds are the units
Term
what is on the y-axis
Definition
units are in millivolts,measurement is electrical activity, used for amplitude of the wave
Term
Explain when one might use a single point on a graph and when would use a range. What is the benefit of each?
Definition
One might use the single point if trying to determine the amplitude of the wave at an exact point in time.
,One might use a single point when trying to determine the exact time at which an event occurred.,
One would use a single point when using the VALUE setting., One would use a range to have the computer determine the a maximum or minimum value in a peak or trough, respectively.,
One would use range to allow the computer to generate the most accurate measure of maximum or minimum.,
One might use a range to measure a duration (how much time passed) from one point to another
Term
human error
Definition
The more measurements that are taken (e.g., A-B, B-C, C-D, three measurements), the greater the potential of human error.
Term
Given that BIOPAC can be used to measure the electrical activity in the body...
Measurement, Organ or System
Definition
Electrocardiography, Heart, Electromyograpy, Skeletal Muscle, Electroencephalography, Brain
Term
amplitude
Definition
is the distance of a data point on the line from the baseline
Term
baseline
Definition
line in the middle that measures distance above and below the baseline. positive and negative.
Term
trough
Definition
lowest point of a dip below the baseline
Term
peak
Definition
the highest point of a wave above the line
Term
wave cycle
Definition
is considered to be the amount of time it takes a waveform to go from one peak or trough, to the next peak or trough
Term
frequency
Definition
as the number of cycles per seconds.
Term
hertz
Definition
unit of measurement for frequency
Term
periodic
Definition
waveforms with constant frequency
Term
non-periodic
Definition
waveforms with variable intervals of time between peaks or troughs
Term
in-phase
Definition
when two waveforms add together and result in a complex waveform, that creates a greater amplitude
Term
out-of-phase
Definition
added together that cancel each other out
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