quizlet

• Visual Pathway

  Anatomical route for transmitting retina signals to the brain
• Retina


  Start point of the visual pathway; contains visual receptors
• Optic Nerve


  Transmits signals from the retina to the brain; intraocular length varies
• Optic Chiasm


  Point where nasal fibers cross to join temporal fibers of the opposite eye
• Optic Tract


  Comprised of lateral and medial roots; 10% terminate elsewhere
• Lateral Geniculate Body


  Nucleus under the thalamus pulvinar; avoids projections on thalamus
• Optic Radiation


  Fiber bundle with cell bodies in LGN; carries signals to visual cortex
• Visual Cortex


  Located in occipital lobe; processes visual information like form, movement, color
• V1


  Striate cortex; processes foveal visual information
• V2


  Extrastriate cortex; receives from V1 and sends to V3, V4, V5
• V3


  Dorsal V3 processes motion; Ventral V3 is sensitive to color
• V4

  Color-responsive area receiving inputs from V2
• V5


  Middle temporal cortex highly sensitive to motion
• V6


  Inferotemporal cortex best responds to simple shapes
• Visual Field


  Space where objects are visible during steady fixation; includes monocular and binocular fields
• Visual Field Development


  Progression of visual field range from newborn to toddlerhood
• Monocular Visual Field


  Central and peripheral vision limits; includes physiological blind spot
• Physiologic Scotoma


  Blind spot located temporally representing the optic nerve head
• Kinds of Visual Field


  Classifications based on eye and head position, and structures
• Characteristics of Visual Field

  Attributes like target size, motion, color, and form in the visual field
• Concept of Visual Field

  Describes sensitivity areas, blind spots, and limits in the visual field
• Perimetry


  Systematic visual field measurement method
• Kinetic Perimetry

  Involves moving target detection in visual field tests
• Static Perimetry


  Involves stationary target detection; identifies field defects and losses
• Visual Field Defects


  Conditions causing partial or complete loss of vision in the visual field