L22_VISION1 - THE VISUAL PERIPHERY Lecture 22 BioNB222 1...

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1 1 BioNB222 THE VISUAL PERIPHERY Lecture 22 BioNB222 Carl Hopkins March 10, 2008 2 BioNB222 3 BioNB222 Iris 4 BioNB222 Ciliary muscle Zonule fibers 5 BioNB222 retina optic disk fovea 6 BioNB222
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2 7 BioNB222 right eye optic disk 8 BioNB222 Optic Disk retina optic disk x y FOVEA RIGHT EYE 9 BioNB222 Optic Disk retina optic disk x y FOVEA RIGHT EYE 10 BioNB222 Using right eye. X Y 11 BioNB222 rods cones 12 BioNB222
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3 13 BioNB222 14 BioNB222 5 major cell types 15 BioNB222 WHAT do the 5 cell types do ? 16 BioNB222 WHAT do the 5 cell types do ? Receptors are “activated” by light (hyperpolarized). cones: different colors rod: monochromatic 17 BioNB222 WHAT do the 5 cell types do ? GANGLION CELLS Output of eye 18 BioNB222 WHAT do the 5 cell types do ? BIPOLAR CELLS Connector
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4 19 BioNB222 WHAT do the 5 cell types do ? HORIZONTAL CELLS lateral connections between receptor cells (cones). Play role in lateral inhibition 20 BioNB222 WHAT do the 5 cell types do ? AMACRINE CELLS
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L22_VISION1 - THE VISUAL PERIPHERY Lecture 22 BioNB222 1...

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