Multiunit and Single-Cell Recordings in Neuroscience
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Questions and Answers

What is the most important technological advance in neurophysiology according to the text?

  • Multiunit recording
  • Single-cell recordings (correct)
  • EEG recording
  • Neural gap detectors
  • Which method enabled researchers to differentiate the pooled activity into contributions from individual neurons?

  • Tonotopic representation
  • Single-cell recording (correct)
  • Extracellular recording
  • EEG recording
  • What type of electrode is typically used in single-cell recordings to measure changes in electrical activity near a neuronal membrane?

  • Intracellular electrode (correct)
  • Thick electrode
  • Extracellular electrode
  • Sensory electrode
  • Which type of representation involves organizing auditory input based on sound frequency?

    <p>Tonotopic representation</p> Signup and view all the answers

    In single-cell recordings, which activity can be measured when the electrode is near a neuronal membrane?

    <p>Electrical activity</p> Signup and view all the answers

    What technique involves describing the response characteristics of individual elements by computer algorithms differentiating pooled activity?

    <p>Multiunit recording</p> Signup and view all the answers

    What is the purpose of multiunit recording techniques?

    <p>To record in many neurons simultaneously.</p> Signup and view all the answers

    In which medical situations are single-cell recordings in humans typically used?

    <p>For cases of epilepsy or tumor removal.</p> Signup and view all the answers

    Where are electrodes commonly placed in the brain for epilepsy cases?

    <p>In the medial temporal lobe (MTL).</p> Signup and view all the answers

    What do populations of neurons produce when they are active together?

    <p>Electrical potentials measurable by non-invasive scalp electrodes (EEG).</p> Signup and view all the answers

    What does EEG measure in terms of neuronal activity?

    <p>Synchronized synaptic activity in a population of cortical neurons.</p> Signup and view all the answers

    Why is EEG better at detecting certain currents inside the brain compared to MEG?

    <p>Because EEG measures currents originating deeper inside the brain.</p> Signup and view all the answers

    What is the main purpose of using an elastic cap with surface electrodes in EEG recordings?

    <p>To record overall brain activity through continuous monitoring</p> Signup and view all the answers

    Where is the reference electrode usually located in EEG recordings?

    <p>On the mastoid bone at the base of the skull</p> Signup and view all the answers

    Which type of brain waves are typically observed during deep sleep according to EEG recordings?

    <p>Slow, high-amplitude oscillations</p> Signup and view all the answers

    How does EEG help in detecting abnormalities in brain function?

    <p>By showing well-established and consistent EEG patterns</p> Signup and view all the answers

    What type of information does EEG recording primarily reflect?

    <p>Global brain activity</p> Signup and view all the answers

    In multiunit recordings, what do the recorded signals reflect?

    <p>The activity of a population of neurons</p> Signup and view all the answers

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