Using "blind-spots" to locate brain damage

Damage to the primary visual cortex leads to a loss of vision in a very specific region of the visual field. Before brain scanners, the 'blind spot' of a brain damaged patient would give a doctor a very good idea of the extent and location of a brain lesion (caused, say, by a stroke).

Scotoma

A diagram of the brain with area of a scotoma highlighted An image showing the area of blindness caused by a scotoma

Quadrantanopia

A diagram of the brain with area of a quadrantanopia highlighted An image showing the area of blindness caused by a quadrantanopia

Hemianopia

A diagram of the brain with area of a hemianopia highlighted An image showing the area of blindness caused by a hemianopia

Latest news - lectures

  • Announcing the first undergraduate course in Neuroesthetics at UCL (starting 2 October 2017)
  • Future engagement: 7 September 2017 Opening lecture: Aesthetic Experiences and their Uses at 13:00 at a conference entitled The Power of Motifs at the University of Oslo, Norway
  • Future engagement: 13 September 2017 A lecture on The Neurobiology of Beauty at 16:20 at the Monakow Lecture Hall, Clinic for Neurology, University of Zurich (part of the Scientific Symposium for the 25th anniversary of the Koetser Foundation)
  • Future engagement: 30 September - 2 October 2017 A lecture on The Experience of Mathematical Beauty at the Altius Society, Oxford
  • Future engagement: 10 October 2017 A lecture on The Neurobiology of Beauty and Its Implications at 13:00 at the Faraday Institute, Cambridge (Garden Room, Library Building, St Edmund's College, Cambridge CB3 0BN)
  • Future engagement: 23 November 2017 A lecture on The Neurobiology of Beauty and Its Implications 18:00-19:30 at the University Centre Somerset, Wellington Road, Taunton, Somerset TA1 5AX
  • Future engagement: 15 February 2018 Cognition Lecture at the T S Srinivasan NIMHANS Conclave
  • Future engagement: 17 February 2018 The Ramon y Cajal Award lecture of INA, Bengaluru, India
  • Future engagement: 18 February 2018 The T S Srinivasan Oration, Chennai, India

Latest news - publications

  • Recently appeared: The Bayesian-Laplacian Brain Semir Zeki, Oliver Y. Chén bioRXiv
  • Recently appeared: Imaging the passionate stage of romantic love by dopamine dynamics by Kayo Takahashi, Kei Mizuno, Akihiro T Sasaki, Yasuhiro Wada, Masaaki Tanaka, Akira Ishii, Kanakao Tajima, Naohiro Tsuyuguchi, Kyosuke Watanabe, Semir Zeki and Yasuyoshi Watanabe is now available in Frontiers in Human Neuroscience
  • Recently appeared: A special issue of The Philosophical Transactions of the Royal Society, edited by Semir Zeki, to commemorate the 350th anniversary of the birth of this, the first peer-reviewed journal, is now online. It is entitled "Cerebral Cartography: a vision of its future" and contains, among other articles, ones giving detailed descriptions of the American, European and Japanese brain initiative programmes.
  • Recently appeared: A massively asynchronous, parallel brain by Semir Zeki is now available in Philosophical Transactions of the Royal Society B.
  • Recently appeared: Area V5 - a microcosm of the visual brain by Semir Zeki is now available in Frontiers in Integrative Neuroscience
  • Recently appeared: Parallel processing of face and house stimuli by V1 and specialized visual areas: a magnetoencephalographic (MEG) study by Yoshihito Shigihara and Semir Zeki is now available in Frontiers in Human Neuroscience
  • Recently appeared: A neurobiological enquiry into the origins of our experience of the sublime and beautiful by Tomohiro Ishizu and Semir Zeki is now available in Frontiers in Human Neuroscience
  • Recently appeared: Neurobiology and the Humanities by Semir Zeki is now available in Neuron
  • Recently appeared: Non-binding relationship between visual features by Dragan Rangelov and Semir Zeki is now available in Frontiers in Human Neuroscience
  • Recently appeared: Parallel processing in the brain's visual form system: An fMRI study by Yoshihito Shigihara and Semir Zeki in Frontiers in Human Neuroscience
  • Recently appeared: Masking reveals parallel form systems in the visual brain by Yu Tung Lo and Semir Zeki in Frontiers in Human Neuroscience
  • Now available: The role of parietal cortex in the formation of colour and motion based concepts by Samuel W. Cheadle and Semir Zeki in Frontiers in Human Neuroscience
  • Now available: Semir Zeki's first book, A Vision of the Brain, can be downloaded here.
  • Now available: Perceptual asynchrony for motion by Yu Tung Lo and Semir Zeki in Frontiers in Human Neuroscience.
  • Now available: Varieties of perceptual instability and their neural correlates by Tomohiro Ishizu and Semir Zeki in Neuroimage.
  • Now available: The experience of mathematical beauty and its neural correlates by Semir Zeki, John Romaya, Dionigi Benincasa and Sir Michael Atiyah in Frontiers in Human Neuroscience.
  • Now available: The "Visual Shock" of Francis Bacon: an essay in neuroesthetics by Semir Zeki and Tomohiro Ishizu in Frontiers in Human Neuroscience.
  • Now available: Clive Bell's "Significant Form" and the neurobiology of aesthetics by Semir Zeki is now available under open access in Frontiers in Human Neuroscience.
  • Now available: The brain's specialized systems for aesthetic and perceptual judgments by Semir Zeki and Tomohiro Ishizu is now available under open access in the European Journal of Neuroscience.
  • Now available: Parallelism in the brain's visual form system by Semir Zeki and Yoshihito Shigihara is now available in the European Journal of Neuroscience.
  • Now available: Splendors and Miseries of the Brain is now available in Greek and Polish (also available in Spanish, Italian and German).