MIT OpenCourseWare http://ocw.mit.edu 9.01 Introduction to NeuroscienceFall 2007 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms.9.01 Recitation 10/24/07 Section 3 - Targets of the optic tract: Lateral Geniculate Nucleus (LGN) - LGN processes information from visual field Retinofugal Pathway Lesions L optic nerve (1): L optic tract (2): Optic chiasm (3): Retinal Output LGN Eye Ganglion Cell Type Layer LGN Cell Type 6 5 4 3 2 1 Ventral to each principal layer - LGN neuron receptive fields: Figure by MIT OpenCourseWare. After figure 10.3 in: Bear, Mark F.,Barry W. Connors, and Michael A. Paradiso.Neuroscience: Exploring the Brain. 2nd ed. Baltimore, Md.:Lippincott Williams & Wilkins, 2001. ISBN: 0683305964.Primary Visual Cortex (V1, Area 17, Striate Cortex) - Retinotopicity: Superficial Deep I II III IVA IVB IVCα IVCβ V VI - Target of most LGN neurons: - Magnocellular: - IVC � II, III, IVB -- Parvocellular: - Koniocellular: - Intracortical connections - Horizontal - Radial - Outputs - II, III, IVB: - V: - VI: - Organizational models - Ocular Dominance Columns: - Cytochrome Oxidase Blobs: - Cortical Modules: - Higher visual areas - “Where” (dorsal) pathway: - “What” (ventral) pathway:V1 LGN
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