Research
Colin Blakemore's research has focused on vision, the early development of the brain and, more recently, conditions such as stroke and Huntington's disease. He has published hundreds of scientific papers and a number of books on these subjects.
His major contribution to neuroscience is the part he played in establishing the concept of neuronal plasticity, the capacity of the brain to reorganise itself as a result of the pattern of activity passing through its connections. Blakemore was one of the first, in the late 1960s, to demonstrate that the visual part of the cerebral cortex undergoes active, adaptive change during a specific period shortly after birth, and he argued that this helps the brain to match itself to the sensory environment. He went on to show that such plasticity results from changes in the shape and structure of nerve cells and the distribution of nerve fibres, and also from the selective death of nerve cells.
Although initially controversial, the idea that the mammalian brain is 'plastic' and adaptive is now a dominant theme in neuroscience. The plasticity of connections between nerve cells is thought to underlie many different types of learning and memory, as well as sensory development. The changes in organisation can be remarkably rapid, even in adults. Blakemore has shown that the visual parts of the human cortex are 'taken over' by the other senses, especially touch, in people who have been blind since shortly after birth. After stroke or other forms of brain injury, reorganisation of this sort can help the process of recovery, as other parts of the brain take over the function of the damaged part.
Blakemore's recent work has emphasized the variety of molecular mechanisms that contribute to plasticity and has identified some of the genes involved in enabling nerve cells to modify their connections in response to the flow of nerve impulses through them. He summarised research on brain plasticity in his 2005 Harveian Lecture to the Royal College of Physicians.
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