“In The Name of God”
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Transcript of “In The Name of God”
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“In The Name of God”
Ventral & Dorsal
Presented by: Yoosef Najian
Visual Pathway
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• Cones
• Rods
Parvocells (P cells)
Magnocells (M cells)
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Question ?
• Stimulus feature M cells P cells
– Color Contrast
– Luminance contrast
– Spatial Frequency
– Temporal Frequency
• Sensitivity
NO Yes
Higher Lower
Lower Higher
Higher Lower
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Inferior Retina
Superior Retina
Upper visual Field
Lower visual Field
Inferior V1
Superior V1
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• Layers of the Cortex– I : Molecular Layer– II : External Granule Cell Layer– III : External Pyramidal Cell Layer– IV : Internal Granule Cell Layer– V : Internal Pyramidal Cell Layer– VI : Multiform Layer
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What System = Parvocellular Pathway = P Pathway = Ventral Pathway =
Temporal Pathway
Where System = Magnocellular Pathway = M Pathway = Dorsal Pathway =
Parietal Pathway
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Organization of Visual Areas in Macaque and Human Cerebral
Cortex
David C. Van Essen
In: Visual Neurosciences (L. Chalupa and J. Werner, eds.)
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visual (blue , 52%)somatosensory (green, 10%)auditory (red, 3%)motor (magenta, 8%)olfactory (brown, 1%)Unassigned cortex (gray, 25%) is mostly cognitive or emotional in function
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How can we identify distinct visual areas?
– Architecture– Connectivity– Visual Topography– Functional
Characteristics
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Sulci :
• STS: Superior temporal sulcus
• AMTS: Anterior middle temporal sulcus
• PMTS: Posterior middle temporal sulcus
• OTS: Occipitotemporal sulcus
• RS: Rhinal sulcus• IOS: Inferior occipital
sulcus• LS: Latral sulcus
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Areas:
• TEOd ~ PITd
• TEOv ~ PITv
• TEpd ~ CITd
• TEpv ~ CITv
• TEad ~ AITd
• TEav ~ AITv
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Keiji Tanaka
• TEOd
• TEpd
• TEad
• TEOv • TEpv • TEav
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Kadharbatcha S. SaleemKeiji TanakaKathleen S. RocklandK. ChengW. SuzukiT. HashikawaWebster MJBachevalier JUngerleider LG
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Overall Distribution of Labeled Terminals(1)
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Single Axon Reconstruction(1)
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Single Axon Reconstruction(2)
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Single Axon Reconstruction(3)
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Conclusion:LIPd
LIPv
LOPV3A
Parietal AreasPrefrontal Areas
8 45
12
1113
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The Ventral Visual Object Pathway in Humans : Evidence from fMRI
Nancy Kanwisher
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