Topic 6 Vision Dr. Kimberley Campbell: Sensation and Perception
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Questions and Answers

What is the role of the Retinohypothalamic tract?

  • Regulating circadian rhythms and pupillary reflex (correct)
  • Processing color and form information
  • Receiving signals from the lateral geniculate nucleus
  • Synthesizing visual information from the occipital cortex

    • Where does the input from the right half of each retina go?

  • Left LGN
  • Right LGN (correct)
  • Parvocellular cells
  • Occipital Cortex

    • Which layers in the lateral geniculate nucleus receive input from the ipsilateral retina?

  • 2, 3, and 5 (correct)
  • 1, 4, and 6
  • 1 and 2
  • 3 to 6

    • What are blobs in the occipital cortex stained for?

    <p>Cytochrome oxidase</p> Signup and view all the answers

    Where is the Fusiform face area (FFA) located?

    <p>Fusiform gyrus below the IT cortex</p> Signup and view all the answers

    What is the role of neurons in cortical region V4?

    <p>Responsive to various perceived colors</p> Signup and view all the answers

    What is the function of the dorsal stream in visual processing?

    <p>Grasping objects for action</p> Signup and view all the answers

    What is a consequence of injury to the What Pathway?

    <p>Visual-form agnosia</p> Signup and view all the answers

    What is one of the effects of damaging the How Pathway?

    <p>Impaired object grasping ability</p> Signup and view all the answers

    Which part of the brain is involved in processing visual information for action?

    <p>Posterior parietal cortex</p> Signup and view all the answers

    What do lesioning or ablation experiments involve?

    <p>Removing or destroying specific brain regions</p> Signup and view all the answers

    What type of task was involved in the object discrimination problem in Ungerleider and Mishkin's experiment?

    <p>Two-choice task</p> Signup and view all the answers

    Which part of the brain was removed in the monkeys that had problems with the landmark discrimination task in Ungerleider and Mishkin's experiment?

    <p>Parietal lobe</p> Signup and view all the answers

    What is the term used for animals reared in environments with only certain types of stimuli?

    <p>Selective rearing</p> Signup and view all the answers

    Which perceptual ability was tested to determine the portions of the brain responsible for specific behaviors in animals?

    <p>Visual discrimination</p> Signup and view all the answers

    What happened when part of the temporal lobe was removed from monkeys in Ungerleider and Mishkin's experiment?

    <p>Problems with landmark discrimination</p> Signup and view all the answers

    What was the outcome of selective rearing on neurons according to the text?

    <p>Increased predomination of responsive neurons</p> Signup and view all the answers

    What is the difference between sensation and perception?

    <p>Sensation is the stimulation of sense organs by physical stimuli, while perception is the interpretation of that sensory input.</p> Signup and view all the answers

    What is the role of Fechner’s law in sensation?

    <p>Fechner’s law involves the subjective sensation's relationship with the logarithm of stimulus intensity.</p> Signup and view all the answers

    Which area in the eye is specialized for high acuity vision?

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

    What causes myopia or nearsightedness?

    <p>Refractive errors in how light enters the eye</p> Signup and view all the answers

    Which type of retinal cells are specialized for color vision and high visual acuity?

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

    What is the role of horizontal cells in the retina?

    <p>Links photoreceptors and bipolar cells</p> Signup and view all the answers

    In which region of the retina does light energy initiate neural activity?

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

    What type of pigments are responsible for color vision in bright light?

    <p>Cones pigments</p> Signup and view all the answers

    What is axial myopia primarily caused by?

    <p>Eyeball being too long</p> Signup and view all the answers

    How does cortical magnification affect representation in the neocortex?

    <p>It causes larger areas of the fovea to be represented on the cortex compared to periphery.</p> Signup and view all the answers

    What specialized area in the temporal cortex is activated by pictures of bodies and body parts?

    <p>Extrastriate body area (EBA)</p> Signup and view all the answers

    Which theory explains why most people who are color blind are dichromats?

    <p>Trichromatic Theory</p> Signup and view all the answers

    In the lateral geniculate nucleus (LGN), what do neurons have?

    <p>Visual fields</p> Signup and view all the answers

    Which area is NOT involved in perceiving faces according to the passage?

    <p>Extrastriate body area (EBA)</p> Signup and view all the answers

    What is the function of Ocular Dominance Columns in the visual cortex?

    <p>Respond preferentially to one eye</p> Signup and view all the answers

    What is the role of the Corpus Callosum according to the text?

    <p>Connects most of the frontal lobes</p> Signup and view all the answers

    Which theory explains the phenomenon of afterimages?

    <p>Opponent-Process Theory</p> Signup and view all the answers

    What type of color mixing removes some wavelengths of light?

    <p>Subtractive colour mixing</p> Signup and view all the answers

    Which area responds to places but not objects or faces?

    <p>Parahippocampal place area (PPA)</p> Signup and view all the answers

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