lecture 15
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Questions and Answers

Which of the following is a feature of the orientation columns within a cortical module?

  • They are 2 mm x 2 mm x 2 mm in size
  • They analyze the color of visual objects
  • There are 4 orientation columns per module (correct)
  • They are shaped like cubes
  • What is the purpose of the ocular dominance columns within a cortical module?

  • They provide a topographic map of the visual field
  • They ensure that neurons respond preferentially to input from one eye (correct)
  • They analyze the shape and form of visual objects
  • They integrate inputs from different sensory modalities
  • What is the purpose of the 'blobs' within a cortical module?

  • They provide a topographic map of the visual field
  • They integrate inputs from different ocular dominance columns
  • They analyze the orientation of visual objects
  • They analyze the color of visual objects (correct)
  • What is the purpose of the visuotopic 'map' formed by the arrangement of cortical modules?

    <p>It provides a topographic representation of the visual field</p> Signup and view all the answers

    How do the neurons within a single cortical module differ from those in the inferotemporal cortex?

    <p>Neurons in a cortical module respond to a narrower range of visual features</p> Signup and view all the answers

    What type of stimuli do subsets of neurons in the inferotemporal cortex (IT) respond selectively to?

    <p>Highly complex visual stimuli like hands, faces, food</p> Signup and view all the answers

    In a progressive rotation of line orientation across the orientation columns, what is the difference in rotation between adjacent orientation columns?

    <p>10°</p> Signup and view all the answers

    What drives neurons as you move across the orientation columns?

    <p>Progressive rotation of line orientation</p> Signup and view all the answers

    What does your perception on a visual stimulus depend upon in relevant cortical modules?

    <p>Which subsets of cells are active</p> Signup and view all the answers

    What is the primary function of the dorsal stream in the parietal cortex?

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

    What is the key difference between the neurons in layer 4C and the neurons in the layers above and below it?

    <p>Neurons in layer 4C respond to input from only one eye, while the neurons in the layers above and below respond to input from both eyes.</p> Signup and view all the answers

    What is the main characteristic of the neurons in the blobs?

    <p>Blobs neurons are color sensitive but insensitive to shape.</p> Signup and view all the answers

    How many blobs are there in each cortical module?

    <p>16 blobs per cortical module</p> Signup and view all the answers

    Where do neurons in the blobs mainly project to?

    <p>V4</p> Signup and view all the answers

    What is the main source of information about the form of an object?

    <p>Neurons in the orientation columns</p> Signup and view all the answers

    What is the main purpose of the orientation columns within a cortical module in the visual system?

    <p>To process information about the shape and form of visual objects</p> Signup and view all the answers

    What is the primary function of the neurons in the inferotemporal cortex (IT) compared to the neurons in the cortical modules of the primary visual cortex?

    <p>The IT neurons process information about complex visual objects and their meaning, while the cortical module neurons process basic visual features</p> Signup and view all the answers

    What is the primary purpose of the visuotopic 'map' formed by the arrangement of cortical modules in the primary visual cortex?

    <p>To provide a detailed representation of the visual field for further processing</p> Signup and view all the answers

    What is the main characteristic of the neurons in the 'blobs' within a cortical module in the primary visual cortex?

    <p>They analyze the color of visual objects</p> Signup and view all the answers

    What is the primary function of the ocular dominance columns within a cortical module in the primary visual cortex?

    <p>To ensure that neurons in that column respond preferentially to input from one eye</p> Signup and view all the answers

    What is the primary function of the neurons in the inferotemporal cortex (IT)?

    <p>Categorizing and recognizing complex visual objects</p> Signup and view all the answers

    How do cortical modules in the primary visual cortex (V1) process visual information?

    <p>Each cortical module analyzes a distinct portion of the visual field in a mosaic-like manner</p> Signup and view all the answers

    What is the significance of the progressive rotation of line orientation across the orientation columns within a cortical module?

    <p>It allows for the detection of edges at various angles</p> Signup and view all the answers

    What is the primary function of the dorsal stream in the parietal cortex?

    <p>Processing orientation and motion information</p> Signup and view all the answers

    How does the perception of a visual stimulus depend on the activity of neurons in the relevant cortical modules?

    <p>It depends on the specific subset of active neurons within each cortical module</p> Signup and view all the answers

    Which of the following best describes the role of the inferotemporal cortex (IT) in visual processing?

    <p>IT neurons selectively respond to complex visual stimuli, such as faces or objects.</p> Signup and view all the answers

    What is the primary function of the orientation columns within a cortical module in the primary visual cortex (V1)?

    <p>Encoding the orientation of visual stimuli, such as bars of light or dark.</p> Signup and view all the answers

    Which brain region is primarily responsible for integrating information about form and color from the orientation columns and blobs in V1?

    <p>The visual area V4</p> Signup and view all the answers

    How do the neurons in layer 4C of V1 differ from those in the layers above and below it?

    <p>Neurons in layer 4C respond to input from only one eye, while those above and below respond to input from both eyes.</p> Signup and view all the answers

    What is the primary function of the blobs within a cortical module in V1?

    <p>Encoding color information from visual stimuli.</p> Signup and view all the answers

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