Kinesiology 1080A/B Lecture Notes - Lecture 29: Cortical Blindness, Blindsight, Ponzo Illusion

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 1080A/B
• Professor: Matthew Heath

Document Summary

Summary: memory guided actions, af can do them, df cannot. Target is moved left or right of its original location (perturbed location). Eyes lock on target and then hand follows eyes. Reflexive visual control supported by the extrageniculate pathway. Double step paradigm in optic ataxia patients (never make these online corrections) Patient ig: bilateral posterior parietal lobe lesions. Responds only to positional changes; it is achromatic (not sensitive to colour changes) Jj has a unilateral lesion to his left parietal lobe. This problem is only in his left visual field. Has a unilateral lesion to their primary visual cortex. Bypasses the lesion associated with primary visual cortex. This shows that [participants have no conscious awareness of what they"re seeing (cortically blind to the size of the circle) Index of difficulty (size of the target object) on the x axis. Big to small object size (easier to point to a big object rather than a small one)