Echolocation, also called bio sonar, is a biological active sonar used by several animal groups, both in the air and underwater. Echolocating animals emit calls and listen to the echoes of those calls that return from various objects near them. They use these echoes to locate and identify the objects. Echolocation is used for navigation, foraging, and hunting prey.
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 by Lawrence Weiskrantz and his colleagues in a paper published in a 1974 issue of Brain. A previous paper studying the discriminatory capacity of a cortically blind patient was published in Nature in 1973. The assumed existence of blindsight is controversial, with some arguing that it is merely degraded conscious vision.
Donald Redfield Griffin was an American professor of zoology at various universities who conducted seminal research in animal behavior, animal navigation, acoustic orientation and sensory biophysics. In 1938, while an undergraduate at Harvard University, he began studying the navigational method of bats, which he identified as animal echolocation in 1944. In The Question of Animal Awareness (1976), he argued that animals are conscious like humans. Griffin was the originator of the concept of mentophobia: the denial of the consciousness of other animals by scientists.
The Royal National Institute of Blind People (RNIB) is a UK charity offering information, support and advice to almost two million people in the UK with sight loss. The charity affords practical and emotional support to those affected by sight issues and acts as an advocacy body.
Human echolocation is the ability of humans to detect objects in their environment by sensing echoes from those objects, by actively creating sounds: for example, by tapping their canes, lightly stomping their foot, snapping their fingers, or making clicking noises with their mouths. People trained to orient by echolocation can interpret the sound waves reflected by nearby objects, accurately identifying their location and size.
Sound localization is a listener's ability to identify the location or origin of a detected sound in direction and distance.
Sensory substitution is a change of the characteristics of one sensory modality into stimuli of another sensory modality.
Neuroplasticity, also known as neural plasticity or brain plasticity, is the ability of neural networks in the brain to change through growth and reorganization. It is when the brain is rewired to function in some way that differs from how it previously functioned. These changes range from individual neuron pathways making new connections, to systematic adjustments like cortical remapping or neural oscillation. Other forms of neuroplasticity include homologous area adaptation, cross modal reassignment, map expansion, and compensatory masquerade. Examples of neuroplasticity include circuit and network changes that result from learning a new ability, information acquisition, environmental influences, practice, and psychological stress.
Visual or vision impairment is the partial or total inability of visual perception. In the absence of treatment such as corrective eyewear, assistive devices, and medical treatment – visual impairment may cause the individual difficulties with normal daily tasks including reading and walking. The terms low vision and blindness are often used for levels of impairment which are difficult or impossible to correct and significantly impact daily life. In addition to the various permanent conditions, fleeting temporary vision impairment, amaurosis fugax, may occur, and may indicate serious medical problems.
Acoustic location is a method of determining the position of an object or sound source by using sound waves. Location can take place in gases, liquids, and in solids.
Gary Klein is a research psychologist famous for pioneering in the field of naturalistic decision making. By studying experts such as firefighters in their natural environment, he discovered that laboratory models of decision making could not describe it under uncertainty. His recognition-primed decision (RPD) model has influenced changes in the ways the Marines and Army train their officers to make decisions.
Recovery from blindness is the phenomenon of a blind person gaining the ability to see, usually as a result of medical treatment. As a thought experiment, the phenomenon is usually referred to as Molyneux's problem. It is often stated that the first published human case was reported in 1728 by the surgeon William Cheselden. However, there is no evidence that Cheselden's patient, a boy named Daniel Dolins, actually recovered any vision. Patients who experience dramatic recovery from blindness experience significant to total agnosia, having serious confusion with their visual perception.
Winthrop Niles Kellogg was an American comparative psychologist who studied the behavior of a number of intelligent animal species.
"What Is It Like to Be a Bat?" is a paper by American philosopher Thomas Nagel, first published in The Philosophical Review in October 1974, and later in Nagel's Mortal Questions (1979). The paper presents several difficulties posed by consciousness, including the possible insolubility of the mind–body problem owing to "facts beyond the reach of human concepts", the limits of objectivity and reductionism, the "phenomenological features" of subjective experience, the limits of human imagination, and what it means to be a particular, conscious thing.
A visual prosthesis, often referred to as a bionic eye, is an experimental visual device intended to restore functional vision in those with partial or total blindness. Many devices have been developed, usually modeled on the cochlear implant or bionic ear devices, a type of neural prosthesis in use since the mid-1980s. The idea of using electrical current to provide sight dates back to the 18th century, discussed by Benjamin Franklin, Tiberius Cavallo, and Charles LeRoy.
James A. Simmons is a pioneer in the field of biosonar. His research includes behavioral and neurophysiological studies of sound processing in the echolocating bat. From the time he began graduate research in the late 1960s to the present, he has been in the forefront of bat echolocation research. Simmons was honored as a fellow of the Acoustical Society of America (ASA) in 1996 and of the American Association for the Advancement of Science in 2000. He was awarded the ASA's second Silver Medal in Animal Bioacoustics in 2005. His current position is Professor in the Department of Neuroscience, Brown University.
A sense is a biological system used by an organism for sensation, the process of gathering information about the surroundings through the detection of stimuli. Although, in some cultures, five human senses were traditionally identified as such, many more are now recognized. Senses used by non-human organisms are even greater in variety and number. During sensation, sense organs collect various stimuli for transduction, meaning transformation into a form that can be understood by the brain. Sensation and perception are fundamental to nearly every aspect of an organism's cognition, behavior and thought.
Thaandavam (transl. Dance) is a 2012 Indian Tamil-language neo-noir action thriller film written and directed by A. L. Vijay. The film stars an ensemble cast with Vikram, Jagapati Babu, Anushka Shetty, Amy Jackson, Lakshmi Rai, Nassar, Santhanam, Raj Arjun and Saranya in pivotal roles It is produced by UTV Motion Pictures and features music composed by G. V. Prakash Kumar. Thaandavam was released worldwide on 28 September 2012.
Neuropolitics is a science which investigates the interplay between the brain and politics. It combines work from a variety of scientific fields which includes neuroscience, political science, psychology, behavioral genetics, primatology, and ethology. Often, neuropolitics research borrow methods from cognitive neuroscience to investigate classic questions from political science such as how people make political decisions, form political / ideological attitudes, evaluate political candidates, and interact in political coalitions. However, another line of research considers the role that evolving political competition has had on the development of the brain in humans and other species. The research in neuropolitics often intersects with work in genopolitics, political psychology, political physiology, sociobiology, neuroeconomics, and neurolaw.
World Access for the Blind (WAFTB) is an international non-profit, non-governmental and educational organisation based in California, United States. The organisation was started to strengthen the physical, mental and personal development of people with all forms of blindness, and to increase public awareness about the strengths and capabilities of blind people. It was founded by Daniel Kish of Long Beach, California, in 2000. The primary work of the non-profit is to encourage and teach blind people the technique of echolocation for their movement, so as to minimise their inhibition with respect to people with normal sight. Their innovative training is called FlashSonar, which involves using sound for navigation. Their strategic campaigns are based on the philosophical stand: No Limits. The organisation participated in the medical study of human echolocation in 2011.
