Visual Fields KW 8-20. Fovea on Cortex KW 8-22 Occipital Lobes are Independent KW 8-24.

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Presentation transcript:

Visual Fields KW 8-20

Fovea on Cortex KW 8-22

Occipital Lobes are Independent KW 8-24

Visual Areas

Areas V1 – V5 KW 8-17

Visual Cortex

Figure 6.16 Receptive fields The receptive field of a receptor is simply the area of the visual field from which light strikes that receptor. For any other cell in the visual system, the receptive field is determined by which receptors connect to the cell in question. Receptive Fields

Neural Activity KW 8-25

Overlap in Receptive Fields KW 8-27

Simple Cells 1 KW 8-29 Hubel and Wiesel Nobel Prize Winners Mapping the Visual Cortex

Simple Cells 2 KW 8-29

Complex Cells KW 8-30

Neural Basis of Visual Perception The Cerebral Cortex: The Shape Pathway Hubel and Wiesel’s Cell Types in the Primary Visual Cortex Simple Cells Straight lines in particular orientation Complex Cells Straight lines in particular orientation in motion Hypercomplex cells Edge detector (edge in motion)

Hypercomlex Cell KW 8-31

Column Organization KW 8-34

Lesions in visual cortex KW 8-39

Dorsal and Ventral Streams KW 8-14 Where What

What and Where Cortical Areas

Neural Basis of Perception Disorders of Object Recognition Visual Agnosia- Inability to Recognize Objects Prosopagnosia- Inability to recognize faces Contralateral Neglect - neglect left side of visual world

Injury to the “What” Pathway KW 8-40

Temporal Columns KW 8-35

Monkey Face Cells

Mona Lisa Flip

Mona Lisa Pair

Raderscheit Self-portraits 2 mo 6 mo 3.5 mo 9 months after right parietal stroke Neglect

Left Visual Field Right Visual Left Brain Right Brain Neglect Example 1

Left Visual Field Right Visual Left Brain Right Brain Neglect Example 2

Left Visual Field Right Visual Left Brain Right Brain Neglect Example 3

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