Intro arrow 5. Primary Visual Cortex arrow 5.4 Masking and V1
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0. Left & Right Brain
1. Masking Alpha Channel
2. Rods & Cones
3. LGN: Magno & Parvo
4. SC: Superior Colliculus
5. Primary Visual Cortex
6. Dorsal - Ventral Stream
7. Eye Movements
8. Oculomotor System
9. Balance System
10. Ectopia & Microgyrus
11. Genetic Etiology
12. Reading
13. Animals
14. Conclusion / Solution
15. Different Theories
16. Peace of Mind
5.4 Facial Masking Alpha in Primary Visual Cortex (V1)
The reflection of vertical masking areas (1.1 The Facial Masking & Alignment Region) on the Primary Visual Cortex (V1):

A. The images below represent two eyes focusing at one point (F) and their projection on their Primary Visual Cortices (V1) there are also 4 points in the background, the image to the right has an increased Nasal-Alpha-Area.

1. Normal: All the points fall in clearly in both eyes their view-field.2. Increased: Only the Focus point falls into the view-field of both eyes, two points in the background are each time blocked out by the Alpha-Area.

Result: When 1 & 2 are compared we can see that the Primary Visual Cortex (V1) has to process much less information when Nasal-Alpha-Area is increased.
B. The Focus point (F) is positioned more to the left.

1. Normal: The 2 Red dot's are blocked out and the Nasa-Alpha-Area has got a small projection on to the Peripheral region of V1: small hold-on.2. Increased: The 2 Red dot's are as in 1 blocked out and the Nasal-Alpha-Area covers the Monocular Peripheral region completely: firm hold-on. Here the Nasal area starts to fall in to central foveal area.

Result: There is no big difference between the two combinations except the Vertical-Alpha-Area starts to fall in to the foveal region, that contains mainly cones and is color sensitive, this will have as effect that the subject has to turn his head to have a clear view at the Focus-point (F) or he will be more focused during reading because he has a more restricted sight.
Conclusion: The amount of vertical visual masking and alignment area (Alpha) defines for a big part the amount of information V1 has to process and our Binocular-view-region.



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