Term
| dorsal or parietal stream |
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Definition
| spatial visual information |
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| ventral or temporal theme |
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Definition
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Definition
| larger, 10% of ganglion cells, very sensitive to motion and contrast, project to magnocellular layers of LGN |
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Definition
| project to parvocellular layers of the LGN, smaller receptive fields that are usually color-opponent |
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Definition
| contours that are not physically present, but that are implied by the retinal image. cells as early as area V2 respond to them. |
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Definition
| inability to link faces with identities. caused by bilateral lesions in inferior occipito-temporal reigon |
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Definition
| often associated with prosopagnosia. disturbance in color vision that ranges from reduction in saturation to total color blindness |
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Definition
| focusing power gained by changing the shape of teh lense (fat lens for near points, and flat lens for far points) |
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Definition
| part of retina for central vision |
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Definition
| where retinal vessles originate from and optic nerve exits |
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Definition
| attatched to sclera and form a ring inside the eye - contract, tension on suspensory ligaments degreases, and the lens gets thicker |
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Definition
| jelly like liquid inside of the eye |
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Term
| center-surround receptive fields |
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Definition
| the center responds to one stimulus, the surround responds in the opposite way to that stimulus |
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Definition
| optic nerves combine here at the base of the brain, just anterior to the pituitary gland |
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Definition
| axons of the retinofugal projections (from the optic chiasm) |
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Definition
| in the dorsal thalamus - project to visual cortex (called optic radiation) |
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Definition
| projection from the retina to the superior colliculus |
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| Broadmann's area 17, occipital lobe, also called striate cortex |
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Definition
| in layer IVC of visual cortex, left and right eye inputs laid out in a series of alternating bands |
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Term
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Definition
| blobs, a mitochondrial enzyme used for cell metabolism. forms pillars through layers II and II and V and VI |
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Term
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Definition
| respond best to a thin slit of light or dark that is aligned with the long axis of receptive fields. in layer IVC alpha. so they have orientation selectivity |
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Definition
| shown by neurons in layer IVB - respond to moving stimulus in one direction but not others |
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Definition
| interblob cells in layer III, give on and off responses to stimuli througout receptive field. mostly binocular, relatively insenstive to wavelength of light, and highly selective to stimulus orientation |
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Definition
| section of neurons that respond best to a slit of light in a particular orientation. includes layers of V and VI. |
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Definition
| lots of direction sensitive cells, organization good for motion processing. in dorsal stream. |
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Definition
| in ventral stream. important in perception of shape and color. |
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Definition
| in ventral stream, good at responding to complicated shapes like faces |
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