• Briefly describe the visual cortex. Input and output. Main feature organisational structure and pathways out (i.e. dorsal and ventral pathways
• need to set up the idea of specialisation hypothesis (this is the theoretical idea)
• Bottom up vs top down activation of colour and movement areas. (brain constructs/representations – these can reflect the outside world but also inner experience)
• Bottom up processing
• PET evidence for dissociative colour and movement areas (e.g. Zeki, 1993) – Bottom up processing
• Top down processing
• Imagining colour and movement activates colour and movement areas (Gregory, 1990)
• Achromatopsia – what does this reveal about V4 – or is it just colour?
• Briefly describe achromatopsia
• Gallant at al. (2000) achromatopsia hue and shape matching study.
• Akinetopsia
• Briefly describe achromatopsia (Zihl et al., 1983 – case study)
• Stevens et al., (2009) TMS virtual lesion study
Chapter 5 Gazzaniga et al., 2019
1. Introduction (100 words)
– Briefly introduce cognitive neuroscience and its relevance to visual processing
– State the focus: the dissociation of colour and movement processing in the brain
2. Overview of Visual Processing (150 words)
– Explain the basics of how the brain processes visual information
– Introduce the concepts of the ventral and dorsal streams
3. Colour Processing (250 words)
– Detail the role of the ventral stream in colour perception
– Discuss key areas like V4 and their functions
– Include neuroimaging studies that support these findings
4. Movement Processing (250 words)
– Explain the function of the dorsal stream in motion detection
– Highlight the role of the MT (middle temporal) area and its significance
– Present studies that illustrate movement processing
5. Clinical Evidence (150 words)
– Discuss cases of patients with achromatopsia and akinetopsia
– Explain how these conditions provide evidence for the dissociation
6. Perceptual Tasks and Illusions (100 words)
– Describe how colour and movement can influence perception in illusions
– Mention studies that support this idea
7. Conclusion (100 words)
– Summarise the key points about the dissociation of colour and movement processing
– Reflect on the implications for understanding visual perception and future research