Visual Perception

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10 Questions - Developed by: Emma - Developed on: - 1.333 taken

  • 1
    M Layers (Magnocellular layers in the lateral geniculate nucleus) which run through the bottom two layers of the LGN have what properties:
    Small cell bodies
    Responsive to movement and similar to the superior colliculus
    Cones provide majority of input
    Responsive to colour, fine detail and stationary/ slow moving objects
  • 2
    Which way does information travel along the retino-geniculate striate pathway?
    Visual info - from the retina to the upper layer of the PVC (v2) to the LGN of the thalamus
    Visual info- from the eye to the optic never to the superior colliculus to the primary visual cortex
    Visual info - from the retina to the lower layer of the PVC (v1) via the lateral geniculate nuclei of the thalamus
    Visual info - light enters the eye travels along the optic nerve to the lateral geniculate nucleus of the hypothalamus
  • 3
    Visual pathways project
    To the Primary Visual Cortex
  • 4
    Blindsight monkeys have shown:
    Visual reinforcement is less efficient on the lesioned side and the two systems: Cortical + Subcortical are better than one
    Blind-field is more effective than those without lesioned Hem v1
    Improved head movements to visual stimuli
  • 5
    The Retiono- Geniculate system is
    A part of the superior colliculus
    Involved in lateral inhibition
  • 6
    The Mach bands show
    Lateral Inhibition
    Response to colour
    Contrast dimming
  • 7
    During dim lighting the muscles in the iris:
    Relax and the pupil dilates
    Contract and the pupil constricts
  • 8
    What is the job of the cornea?
    To focus the image
    Regulate the amount of light entering the eye
  • 9
    During Accommodation moderated by the lens for distant focus the cillary muscles
    Relax increasing tension of the suspensory ligaments > lens becomes thin
    Contract relaxing tension of the suspensory ligaments > lens becomes thick
  • 10
    The Retina
    Is involved in transduction (conversion of light into neural code)
    Causes protective support
    Is involved in the metabolic support for the eye
    Is involved in the transmission of visual signals

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