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Instrumentation & Data Interpretation Flashcards

6 cards from real EMG practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Instrumentation & Data Interpretation flashcards as text

  1. What is the function of an amplifier in EMG instrumentation?

    Answer: Amplifies muscle electrical activity

    The amplifier boosts the tiny electrical signals from muscles so they can be displayed and analyzed accurately.

  2. Which setting affects the frequency range displayed in an EMG reading?

    Answer: Filter settings

    Filter settings adjust the frequency range shown, helping isolate relevant signals while minimizing noise.

  3. What does a polyphasic motor unit potential indicate?

    Answer: Reinnervation or neuromuscular disorder

    Polyphasic potentials often reflect reinnervation or immature neuromuscular units, typically seen in recovering or diseased muscle.

  4. What does the sweep speed control in EMG equipment?

    Answer: Time resolution of waveform display

    Sweep speed determines how fast waveforms move across the screen, affecting time resolution of the recording.

  5. How does improper grounding affect EMG signals?

    Answer: Introduces signal noise and interference

    Poor grounding increases electrical noise and can interfere with accurate signal recording and interpretation.

  6. What does a prolonged latency in nerve conduction study suggest?

    Answer: Nerve conduction delay or damage

    Prolonged latency indicates a delay in nerve signal transmission, often due to demyelination or compression.

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