POLS 3322 1st Edition Lecture 13Outline of Last Lecture I. Nature of Sensation and PerceptionII. Sensory ReceptorsIII. PerceptionOutline of Current Lecture II. Functional Anatomy of the Visual SystemIII. Neuronal ActivityCurrent LectureFunctional Anatomy of the Visual SystemVision is our primary sensory experience.Far more of the human brain is dedicated to vision than to any other sense.Understanding the visual system’s organization is therefore key to understanding human brain function.Fovea- Highest area of visual acuity. Mostly cones.Photoreceptors- two kinds are rods and cones. Both are named for their shapes. Cones are responsive to bright light. Rods help with seeing in the nighttime and dim light.Cones- 3 types of pigment, gives color vision.Rods- 1 type.Different cones are responsive to different wavelengths of color. Some wavelengths are longer than others.Pigments: Blue (419 nm), green (531 nm), and red (559 nm). Red is a long wavelength, green is amiddle size, blue is short.Genisculostriate Pathway- major pathway. 80% of vision information is sent here. Retina close to nose- Nasal hemi.These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.Retinal close to head- Temportal hemi.Neuronal ActivityTheories for seeing color: Trichromatic Theory and Opponent
View Full Document
Unlocking...