Motion Processing in the Brain
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Questions and Answers

Which of the following is a reason for motion processing occurring at multiple stages in the brain?

  • To complicate the perception of motion
  • To solve the aperture problem effectively (correct)
  • To eliminate the need for global motion detectors
  • To introduce ambiguity in motion perception

    • What does the presence of distinct populations sensitive to local and global motion imply?

  • That local motion is the only important aspect of motion perception
  • That global motion is irrelevant in visual processing
  • That different scales of motion require different processing (correct)
  • That motion detectors are unnecessary for perception

    • Where are global-motion detectors likely to be located in the brain?

  • The majority of neurons in the middle temporal lobe
  • Lesions in the parvocellular layers of LGN
  • In the superior colliculus
  • In the M pathway of the LGN (correct)

    • Which brain region is known for its important role in motion perception and contains neurons selective for specific motion directions?

    <p>Middle temporal lobe (MT)</p> Signup and view all the answers

    What was the primary focus of Newsome and Pare's 1988 study on motion perception in monkeys?

    <p>Exploring global motion perception through correlated dot motion displays</p> Signup and view all the answers

    In the study by Newsome and Pare, what do the letters A, B, and C represent in the context of the correlated dot motion displays?

    <p>Percentages of dots moving in a coherent direction</p> Signup and view all the answers

    According to the study results, what did the monkeys with lesioned middle temporal lobes need to correctly identify the direction of motion?

    <p>They needed 10 times more dots moving in the same direction to correctly identify the direction of motion.</p> Signup and view all the answers

    What does the outcome of the monkey study suggest about the role of the middle temporal lobe (MT) in motion perception?

    <p>MT is where global integration of Reichert detectors occurs.</p> Signup and view all the answers

    What is akinetopsia, and what causes it in humans?

    <p>A rare neurophysiological disorder in which the affected individual has no perception of motion, caused by disruptions to cortical area MT.</p> Signup and view all the answers

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