1. The Visual System Part 1

4. Aqueous humor secreted from Ciliary body,
Flos to Anterior Chamber, drains through Canal of Schlemm

5. _________

6. Intrinsic Muscles of the Eye: The Iris
circular.....________
radial.....…________
Dilating pupil for eye exam: how to do it?
Pharmacology of
pupillary dilation:
_________

7. Intrinsic Muscles of the Eye: Ciliary Muscle
Ciliary muscle relaxed = tension on zonular fibers = tension on lens = flattened lens = _________________
Ciliary muscle contracted = tension on zonular fibers reduced = less tension on lens = lens becomes more spherical =__________________
Eye strain
Using a Microscope or Binoculars

8. Near point of Accomodation
0.06
0.07
0.08
0.09
0.12
0.14
0.16
0.18
0.3
0.4

9. Demonstrate Convergence
With Convergence
Demonstrate Convergence

10. Extraocular muscles
Motor innervation by CN III = __________ CN IV = __________ CN VI = __________
__________= misalignment of eyes Due to _______________________

11. Lateral geniculate nucleus a subdivision of the thalamus.
             

12. Visual reflexes:
___________, ___________,
___________, ___________.

13. Clinical Case Study: Hyperprolactinemia, p. 627-8 of text

14. The Visual System Part 2

15. The Retina

16. What do you notice with regards to the connections in this complex circuit?
What cells seem to have axons?
What does this mean with regards to sensory coding?

17. S 15
Receptors for
light detection
More membrane = more photosensitive molecules = more sensitive to light
Photoreceptor cells 4 light sensitive proteins: - 1 type of _____ - 3 types of ______, each with a single type

18. Visual Acuity 120,000,000 rods and 6,000,000 cones per retina
1,200,000 retinal ganglion cells & axons
____:___convergence ratio
Fovea:

21. _______ Theory of Color Vision
Differences in spectral sensitivity due to 4 types of ______.
Web-based color deficiency test
_______ Theory of Color Vision

22. “Bleaching” of photopigments
_________
_________

23. What is the advantage of this multistep process?
The cascade of events initiated by light in a photoreceptor. The result of the cascade is to close a cGMP-gated sodium channel, reducing the inward current and hyperpolarizing the membrane. Source: Kandel, Schwartz & Jessell, Principles of Neural Science, 4th Edn
What is the advantage of this multistep process?

24. Hubel and Weisel Experiments
Retinal Ganglion Cells
Lateral Geniculate Neurons
Visual Cortex Neurons
Youtube

26. _____________in the Cortex
Motion sensitive
Color and shape sensitive