Read the following statements regarding biomedical instrumentations : (a) Sphygmos is used for blood pressure measurement. (b) EMG represents a record of the electrical activity of the brain. (c) ERG represents the record of potential from the retina. (d) ECG represents the record of electrical activity of brain. Which of the above statements are correct ?
(a) and (c) are correct.
We need to analyze each of the statements and identify which ones are correct based on the knowledge of biomedical instrumentation.
- Sphygmos is indeed used for blood pressure measurement. The term generally relates to the pulsation or pulse and is linked to sphygmomanometers, which are devices to measure blood pressure. Therefore, statement (a) is correct.
- EMG, or Electromyography, is a diagnostic procedure to assess the health of muscles and the nerve cells that control them (motor neurons). It is not related to brain activity recording; therefore, statement (b) is incorrect.
- ERG, or Electroretinography, measures the electrical responses of various cell types in the retina, including the photoreceptors (rods and cones), inner retinal cells (bipolar cells), and the ganglion cells. This statement is correct as it represents the record of potential from the retina. Therefore, statement (c) is correct.
- ECG, or Electrocardiography, is a test that records the electrical activity of the heart over a period of time using electrodes placed on the skin. It does not involve the recording of brain activity; hence statement (d) is incorrect.
Based on the analysis above, the correct statements are (a) and (c).
The final answer is: (a) and (c) are correct.
Similar Questions
Read the following statements regarding errors in measurement :
(a) Gross errors are mostly due to lack of knowledge and care on the part of the experimenter.
(b) Systematic errors are mostly caused by inherent short-comings of the instruments and components used in measurement.
(c) Random errors are due to sources and causes that cannot be specified for their effects with.
(d) Gross and systematic errors are non-correctable.
Which of the above are correct ?
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Reason (R) : Accuracy of a manometer is not affected by the shape or size of the tubes.
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The amplitude of an electrocardiograph signal is usually of the order of
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A. Detector & video Amplifier
B. Fixed Frequency Active filter
C. Attenuator (Adjustable)
D. Mixer & Tunable Detector
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