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Lecture 12

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Steve Joordens

Lecture 12 Perception vs. Sensation  Information comes from light, sound etc. And a sensation (raw data), gets into receptors (eyes, ears, nose, skin, tongue) and there is then perception which is the interpretation of raw data (brain) o Picture is perceived as Niagara Falls which is just mist and fireworks but its interpreted by the brain o The whole world is a bunch of energy interpreted by our brain and we've mixed sensation with memory  Ex. Photographers are much more interested in how the light plays on images and are interested in the colours shapes and raw sensations because that's what makes the photo pop. They do this very naturally.  Ex. When you do pot a lot, you don't see a lot of categories and more sensation  Every organism on the planet is only getting to see/taste/smell a little bit of the world o Dogs smell the world way better than we do i.e. They can smell cancer better than other scans  Vision - Ability to see wavelengths of energy o We can only see visible light but there are MUCH more that we can't see o Eye  Iris - The coloured part of your eye: a muscle that controls the size of your pupil  Pupil - The black part in the middle of the eye: topening that allows light in and out of eyeball  Sclera - White part: a tough membrane that serves as protection  Cornea - Fluid filled outer coating: provides moisture and nutrients  Lens - Focuses the incoming light onto the retina: Lens that is flexible and slight alterations in it can alter the focus of it (process called accommodation ex. Squint)  Aqueous Humor - Fluid nourishes the front of the eye  Vitreous Humor - Fluid nourishes and supports the inner part of the eye  Retina - Surface that the image lands on: The inner coating is the retina is the part that transmits the light signal into a neural signal  Transduction: Taking a signal from one form and changing it to another form
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