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  2. Extrastriate cortex - Wikipedia

    en.wikipedia.org/wiki/Extrastriate_cortex

    In terms of Brodmann areas, the extrastriate cortex comprises Brodmann area 18 and Brodmann area 19, while the striate cortex comprises Brodmann area 17. [3]In primates, the extrastriate cortex includes visual area V3, visual area V4, and visual area MT (sometimes called V5), [3] while V1 corresponds to the striate cortex, and V2 to the prestriate cortex.

  3. Visual cortex - Wikipedia

    en.wikipedia.org/wiki/Visual_cortex

    The extrastriate areas consist of visual areas 2, 3, 4, and 5 (also known as V2, V3, V4, and V5, or Brodmann area 18 and all Brodmann area 19). [ 1 ] Both hemispheres of the brain include a visual cortex; the visual cortex in the left hemisphere receives signals from the right visual field , and the visual cortex in the right hemisphere ...

  4. Cone cell - Wikipedia

    en.wikipedia.org/wiki/Cone_cell

    L cones respond most strongly to light of the longer red wavelengths, peaking at about 560 nm. M cones, respond most strongly to yellow to green medium-wavelength light, peaking at 530 nm . S cones respond most strongly to blue short-wavelength light, peaking at 420 nm , and make up only around 2% of the cones in the human retina.

  5. Felsite - Wikipedia

    en.wikipedia.org/wiki/Felsite

    Felsite covered with dendritic pyrolusite Dike of felsite on Islay in Scotland. Felsite is a very fine-grained volcanic rock that may or may not contain larger crystals.Felsite is a field term for a light-colored rock that typically requires petrographic examination or chemical analysis for more precise definition.

  6. Precision tests of QED - Wikipedia

    en.wikipedia.org/wiki/Precision_tests_of_QED

    The most precise and specific tests of QED consist of measurements of the electromagnetic fine-structure constant, α, in various physical systems. Checking the consistency of such measurements tests the theory. Tests of a theory are normally carried out by comparing experimental results to theoretical predictions.

  7. Indicator (distance amplifying instrument) - Wikipedia

    en.wikipedia.org/wiki/Indicator_(distance...

    Precise quality of the gear forms and bearing freedom determines the repeatable precision of measurement achieved. Since the mechanisms are necessarily delicate, rugged framework construction is required to perform reliably in harsh applications such as machine tool metalworking operations, similar to how wristwatches are ruggedized.

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