Learning to see in 3D with two eyes: the role of experience, plasticity and neurochemistry
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An article on learning and binocular vision for anyone interested in biology and the brain.
Royal Society Dorothy Hodgkin Research Fellow
The goal of my research is to understand how the brain transforms sensory information into something we can see and feel. The current focus of my research is how images from our two eyes are combined to create a 3-dimensional world. Our ability to see in depth arises in the cerebral cortex, where the similarity and differences in retinal images are compared and fused to create a single image. While early research suggested that stereopsis arises in the primary visual cortex, we now know that many regions in the visual hierarchy respond to binocular disparity. One critical objective is to understand to which extent different regions participate in stereopsis and binocular visuo-motor tasks.
My main methods are a combination of human brain imaging and precise measures of perception. Current neuro-imaging methods allow an insight into how neuronal populations respond to visual stimuli, and can also provide a profile of cortical neurochemicals. Recently, I've started working with volunteers with abnormal binocular vision to help us understand how changes in the balance between the two eyes can affect brain responses and brain chemistry.
Comparison of Neurochemical and BOLD Signal Contrast Response Functions in the Human Visual Cortex
Ip IB. et al, (2019), The Journal of Neuroscience, 39, 7968 - 7975
Dynamic Changes in Excitation and Inhibition During the Cortical Response to Visual Contrast in the Human Brain
Ip IB. et al, (2018), PERCEPTION, 47, 560 - 561
Combined fMRI-MRS acquires simultaneous glutamate and BOLD-fMRI signals in the human brain
Ip IB. et al, (2017), NeuroImage, 155, 113 - 119
Effects of Spatial and Feature Attention on Disparity-Rendered Structure-From-Motion Stimuli in the Human Visual Cortex
Ip IB. et al, (2014), PLoS ONE, 9, e100074 - e100074
Responses to interocular disparity correlation in the human cerebral cortex
Ip IB. et al, (2014), Ophthalmic and Physiological Optics, 34, 186 - 198