Chapter 03: Retinal Ganglion Cell Response
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Questions and Answers

What are spatial frequency channels often referred to as?

  • Filters
  • A set of complex cells
  • Orientation tuned cells
  • A set of simple cells
  • Pattern analyzers (correct)
  • If a movie projector is out of focus and the images on the screen are blurry, which spatial frequencies are missing?

  • High frequencies (correct)
  • Horizontal frequencies
  • Diagonal frequencies
  • Vertical frequencies
  • Low frequencies
  • In a line drawing of an object, which spatial frequencies are least represented?

  • Vertical frequencies
  • Low frequencies
  • Diagonal frequencies
  • Horizontal frequencies
  • High frequencies (correct)
  • Which type of cells are responsible for detecting simple features in spatial frequency channels?

    <p>A set of simple cells</p> Signup and view all the answers

    What kind of cells are mostly involved in processing complex patterns in visual stimuli?

    <p>A set of complex cells</p> Signup and view all the answers

    Which cells exhibit specificity in responding to particular orientations in spatial frequency channels?

    <p>Orientation tuned cells</p> Signup and view all the answers

    Which phase of a sine wave grating would the retinal ganglion cell respond most strongly to?

    <p>Peak</p> Signup and view all the answers

    What types of neurons are found in the lateral geniculate nucleus (LGN)?

    <p>Mixed types</p> Signup and view all the answers

    In which layer do the axons of retinal ganglion cells NOT synapse?

    <p>Cortexes</p> Signup and view all the answers

    What is the main factor determining a retinal ganglion cell's response to a sine wave grating?

    <p>Phase</p> Signup and view all the answers

    Which part of the brain is responsible for processing visual information from the lateral geniculate nucleus?

    <p>Thalamus</p> Signup and view all the answers

    Which concept explains why objects in the fovea are processed more efficiently than those in the periphery?

    <p>Cortical magnification</p> Signup and view all the answers

    If you look for your friend's face in a crowd, which part of their face might be more challenging to recognize due to cortical magnification principles?

    <p>Eyebrows</p> Signup and view all the answers

    What aspect of visual processing can be hindered by clutter according to principles discussed in topographic mapping?

    <p>Horizontal masking</p> Signup and view all the answers

    How is visual acuity measured in terms of visual angle?

    <p>By counting the number of cycles per degree of a grating perceived</p> Signup and view all the answers

    What does the Snellen test measure in terms of visual acuity?

    <p>Reading ability at a distance compared to normal vision</p> Signup and view all the answers

    Why is it important to understand how visual acuity can be measured?

    <p>To diagnose visual impairments and monitor changes in vision over time</p> Signup and view all the answers

    Which method would be most appropriate to assess visual acuity for a person who has difficulty reading signs from far away?

    <p>Using the Snellen test for distance vision</p> Signup and view all the answers

    How does measuring visual acuity in terms of visual angle differ from using the Snellen test?

    <p>Snellen test relies on letter recognition, while visual angle measurement counts cycles per degree of a grating perceived</p> Signup and view all the answers

    What is the primary purpose of the Snellen test in assessing visual acuity?

    <p>To measure how well someone can read letters from a chart compared to normal vision</p> Signup and view all the answers

    What is the main focus of understanding orientation tuning in striate cortex cells?

    <p>How cortical simple cells get their orientation tuning</p> Signup and view all the answers

    Which type of cell has a receptive field with clearly defined excitatory and inhibitory regions?

    <p>Simple</p> Signup and view all the answers

    In the context of striate cortex cells, what does a complex cell lack compared to a simple cell?

    <p>Defined orientation tuning</p> Signup and view all the answers

    What is the primary difference between magnocellular and parvocellular cells in the visual system?

    <p>Speed of neural transmission</p> Signup and view all the answers

    Which characteristic best describes a simple cell in the striate cortex?

    <p>Receptive field with clearly defined excitatory and inhibitory regions</p> Signup and view all the answers

    What vital property do simple and complex cells exhibit in the striate cortex?

    <p>Orientation tuning</p> Signup and view all the answers

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