Lawrence Weiskrantz (28 March 1926 – 27 January 2018) was a British
neuropsychologist
Neuropsychology is a branch of psychology concerned with how a person's cognition and behavior are related to the brain and the rest of the nervous system. Professionals in this branch of psychology focus on how injuries or illnesses of the brai ...
. Weiskrantz is credited with discovering the phenomenon of
blindsight
Blindsight is the ability of people who are cortically blind to respond to visual stimuli that they do not consciously see due to lesions in the primary visual cortex, also known as the striate cortex or Brodmann Area 17. The term was coined ...
, and with establishing the role of the
amygdala
The amygdala (; : amygdalae or amygdalas; also '; Latin from Greek language, Greek, , ', 'almond', 'tonsil') is a paired nucleus (neuroanatomy), nuclear complex present in the Cerebral hemisphere, cerebral hemispheres of vertebrates. It is c ...
in
emotional learning and emotional behavior.
Blindsight is when a person with a brain injury causing blindness can nevertheless detect, point accurately at, and discriminate visually presented objects.
Early life
Weiskrantz originally attended
Girard College, a boarding school in
Philadelphia
Philadelphia ( ), colloquially referred to as Philly, is the List of municipalities in Pennsylvania, most populous city in the U.S. state of Pennsylvania and the List of United States cities by population, sixth-most populous city in the Unit ...
, due in part to the death of his father when he was six.
After graduating, he attended
Swarthmore College
Swarthmore College ( , ) is a Private college, private Liberal arts colleges in the United States, liberal arts college in Swarthmore, Pennsylvania, United States. Founded in 1864, with its first classes held in 1869, Swarthmore is one of the e ...
and served in
World War II
World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
.
Shortly before his graduation, he was awarded a Catherwood fellowship at
Oxford University
The University of Oxford is a collegiate research university in Oxford, England. There is evidence of teaching as early as 1096, making it the oldest university in the English-speaking world and the second-oldest continuously operating u ...
.
Career
Weiskrantz became Professor of Psychology at Oxford University where he remained a full professor until retirement in 1993.
He then became an emeritus professor of the university and an emeritus fellow of
Magdalen College
Magdalen College ( ) is a constituent college of the University of Oxford. It was founded in 1458 by Bishop of Winchester William of Waynflete. It is one of the wealthiest Oxford colleges, as of 2022, and one of the strongest academically, se ...
.
Weiskrantz had a lifelong interest in the writings and research of the Russian neuropsychologist
Alexander Luria
Alexander Romanovich Luria (; , ; 16 July 1902 – 14 August 1977) was a Soviet neuropsychology, neuropsychologist, often credited as a father of modern neuropsychology. He developed an extensive and original battery of neuropsychological ...
, whom he had met and befriended while Luria was still doing research.
The two remained colleagues until Luria's death in 1977.
In the 1950s Weiskrantz went on to ellucidate the region of the
temporal lobe
The temporal lobe is one of the four major lobes of the cerebral cortex in the brain of mammals. The temporal lobe is located beneath the lateral fissure on both cerebral hemispheres of the mammalian brain.
The temporal lobe is involved in pr ...
responsible for the erratic emotional behaviors in
Klüver-Bucy syndrome, a phenomenon known since the 1930 which came to inspire the
limbic brain hypothesis of
emotion
Emotions are physical and mental states brought on by neurophysiology, neurophysiological changes, variously associated with thoughts, feelings, behavior, behavioral responses, and a degree of pleasure or suffering, displeasure. There is ...
.
Although this hypothesis did not live to its claims, Weiskrantz used
instrumental
An instrumental or instrumental song is music without any vocals, although it might include some inarticulate vocals, such as shouted backup vocals in a big band setting. Through Semantic change, semantic widening, a broader sense of the word s ...
fear conditioning
Pavlovian fear conditioning is a behavioral paradigm in which organisms learn to predict aversive events. It is a form of learning in which an aversive stimulus (e.g. an electrical shock) is associated with a particular neutral context (e.g., a r ...
in lesioned animals to identify the temporal structure responsible for
Klüver-Bucy syndrome.
Ever since, the
amygdala
The amygdala (; : amygdalae or amygdalas; also '; Latin from Greek language, Greek, , ', 'almond', 'tonsil') is a paired nucleus (neuroanatomy), nuclear complex present in the Cerebral hemisphere, cerebral hemispheres of vertebrates. It is c ...
has remained crucial in the scientific understanding of emotion.
Weiskrantz is generally credited with having discovered the phenomenon of
blindsight
Blindsight is the ability of people who are cortically blind to respond to visual stimuli that they do not consciously see due to lesions in the primary visual cortex, also known as the striate cortex or Brodmann Area 17. The term was coined ...
following his book on this subject in 1986, which is the voluntary visually evoked response to a stimulus presented within a
scotoma
A scotoma is an area of partial alteration in the field of vision consisting of a partially diminished or entirely degenerated visual acuity that is surrounded by a field of normal – or relatively well-preserved – vision.
Every normal mamm ...
.
Academic and service positions he held included:
* Part-time Lecturer, Tufts University, 1952
* Research Associate, Inst. of Living, 1952–55
* Senior Postdoctoral Fellow, US National Research Council, 1955–56
* Research Associate,
University of Cambridge
The University of Cambridge is a Public university, public collegiate university, collegiate research university in Cambridge, England. Founded in 1209, the University of Cambridge is the List of oldest universities in continuous operation, wo ...
, 1956–61
* Assistant Director of Research, Cambridge, 1961–66
* Reader in Physiological Psychology, Cambridge Univ., 1966–67.
* Founding President of the
European Brain and Behaviour Society, 1969
* Professor of Psychology,
Oxford University
The University of Oxford is a collegiate research university in Oxford, England. There is evidence of teaching as early as 1096, making it the oldest university in the English-speaking world and the second-oldest continuously operating u ...
, and Fellow,
Magdalen College, Oxford
Magdalen College ( ) is a Colleges of the University of Oxford, constituent college of the University of Oxford. It was founded in 1458 by Bishop of Winchester William of Waynflete. It is one of the wealthiest Oxford colleges, as of 2022, and ...
, 1967–1993;
*
Professor Emeritus
''Emeritus/Emerita'' () is an honorary title granted to someone who retirement, retires from a position of distinction, most commonly an academic faculty position, but is allowed to continue using the previous title, as in "professor emeritus".
...
, Oxford University, 1993–2018 and Emeritus Fellow, Magdalen College, Oxford, 1993–2018.
* Honorary President of European Society for Philosophy and Psychology.
* Inaugural President of European Brain and Behaviour Society.
* President of Association for Scientific Study of Consciousness.
Weiskrantz supervised at least 10
PhD
A Doctor of Philosophy (PhD, DPhil; or ) is a terminal degree that usually denotes the highest level of academic achievement in a given discipline and is awarded following a course of graduate study and original research. The name of the deg ...
s, including
Alan Cowey,
Charles Gross,
Nicholas Humphrey
Nicholas Keynes Humphrey (born 27 March 1943) is an English neuropsychologist based in Cambridge, known for his work on the evolution of primate intelligence and consciousness. He studied mountain gorillas with Dian Fossey in Rwanda; he was t ...
,
Susan Iversen, and
Melvyn A. Goodale.
Honours
Weiskrantz was elected a Fellow of the
Royal Society
The Royal Society, formally The Royal Society of London for Improving Natural Knowledge, is a learned society and the United Kingdom's national academy of sciences. The society fulfils a number of roles: promoting science and its benefits, re ...
in 1980.
He was on its council in 1988–1989.
He was a member of the U.S. National Academy of Sciences, and of Academia Europaea.
Weiskrantz served on the Council of the Fyssen Foundation.
Weiskrantz was a medalist of the Royal Society of Medicine and a medalist of the American Association for Advancement of Science.
He delivered the Heisenberg Lecture of the Bavarian Academy of Sciences/Siemens Foundation and the Ferrier Lecture of the Royal Society.
In 1997 he was awarded with an honorary doctorate at
Tilburg University
Tilburg University is a Catholic research university specializing in the social and behavioral sciences, economics, law, business sciences, theology and humanities, located in Tilburg, Netherlands.
Tilburg has a student population of about 19,1 ...
, the Netherlands.
Selected publications
* ''Analysis of Behavioural Change'', 1967
* ''The Neuropsychology of Cognitive Function'', 1982
* ''Animal Intelligence'', 1985
* ''Blindsight: A case Study and Implications'', 1986
* ''Thought Without Language'', 1988
* ''Consciousness Lost and Found'', 1997
References
External links
* Blindsight Experiment video 198
* Memorial Event for Lawrence Weiskrant
{{DEFAULTSORT:Weiskrantz, Lawrence
1926 births
2018 deaths
Fellows of the Royal Society
Jewish British scientists
British psychologists
Fellows of Magdalen College, Oxford
Members of the United States National Academy of Sciences
British military personnel of World War II
20th-century American psychologists