Cognitive neuroscience is an academic field concerned with the scientific study of biological substrates underlying cognition Cognition is the scientific term for "the process of thought." Usage of the term varies in different disciplines; for example in psychology and cognitive science, it usually refers to an information processing view of an individual's psychological functions. Other interpretations of the meaning of cognition link it to the development of[1], with a specific focus on the neural substrates of mental processes. It addresses the questions of how psychological/cognitive functions are produced by the brain. Cognitive neuroscience is a branch of both psychology Psychology is the study of human or animal mental functions and behaviors. In this field, a professional practitioner or researcher is a psychologist. Psychologists are classified as social or behavioral scientists. Psychological research can be considered either basic or applied. Psychologists attempt to understand the role of mental functions in and neuroscience Neuroscience is the scientific study of the nervous system. Traditionally, neuroscience has been seen as a branch of biology. Nevertheless, it is currently an interdisciplinary science that involves other disciplines such as psychology, computer science, mathematics, physics, philosophy, and medicine. As a result, the scope of neuroscience has, overlapping with disciplines such as physiological psychology Physiological psychology is a subdivision of behavioral neuroscience that studies the neural mechanisms of perception and behavior through direct manipulation of the brains of nonhuman animal subjects in controlled experiments. Unlike other subdivisions within biological psychology, the main focus of physiological psychological research is the, cognitive psychology Cognitive psychology is a discipline within psychology that investigates the internal mental processes of thought such as visual processing, memory, thinking, learning, feeling, problem solving, and language and neuropsychology Neuropsychology is the basic scientific discipline that studies the structure and function of the brain related to specific psychological processes and overt behaviors. The term neuropsychology has been applied to lesion studies in humans and animals. It has also been applied to efforts to record electrical activity from individual cells in higher [2]. Cognitive neuroscience relies upon theories in cognitive science Cognitive science is the interdisciplinary study of how information, e.g., concerning perception, language, reasoning, and emotion, is represented and transformed in the brain. It consists of multiple research disciplines, including psychology, artificial intelligence, philosophy, neuroscience, learning sciences, linguistics, anthropology, coupled with evidence from neuropsychology Neuropsychology is the basic scientific discipline that studies the structure and function of the brain related to specific psychological processes and overt behaviors. The term neuropsychology has been applied to lesion studies in humans and animals. It has also been applied to efforts to record electrical activity from individual cells in higher, and computational modelling A computational model is a mathematical model in computational science that requires extensive computational resources to study the behavior of a complex system by computer simulation. The system under study is often a complex nonlinear system for which simple, intuitive analytical solutions are not readily available. Rather than deriving a[2].
Due to its multidisciplinary nature cognitive neuroscientists may have various backgrounds. Other than the associated disciplines just mentioned, cognitive neuroscientists may have backgrounds in these disciplines: neurobiology, bioengineering Biological engineering, biotechnological engineering or bioengineering is the application of engineering principles to address challenges in the fields of biology and medicine. The overlap with Biomedical Engineering can be unclear, as many universities now use the terms "bioengineering" and "biomedical engineering", psychiatry Psychiatry is the medical specialty devoted to the study and treatment of mental disorders—which include various affective, behavioural, cognitive and perceptual disorders. The term was first coined by the German physician Johann Christian Reil in 1808. It literally means the 'medical treatment of the mind' . A medical doctor specializing in, neurology Neurology is a medical specialty dealing with disorders of the nervous system. Specifically, it deals with the diagnosis and treatment of all categories of disease involving the central, peripheral, and autonomic nervous systems, including their coverings, blood vessels, and all effector tissue, such as muscle. The corresponding surgical specialty, physics Physics is a natural science that involves the study of matter and its motion through space-time, as well as all applicable concepts, including energy and force. More broadly, it is the general analysis of nature, conducted in order to understand how the universe behaves, computer science Computer science or computing science is the study of the theoretical foundations of information and computation, and of practical techniques for their implementation and application in computer systems. It is frequently described as the systematic study of algorithmic processes that create, describe, and transform information. Computer science, linguistics Linguistics is the scientific study of natural language. Linguistics encompasses a number of sub-fields. An important topical division is between the study of language structure and the study of meaning (semantics and pragmatics). Grammar encompasses morphology (the formation and composition of words), syntax (the rules that determine how words, philosophy Philosophy is the study of general and fundamental problems concerning matters such as existence, knowledge, values, reason, mind, and language. It is distinguished from other ways of addressing fundamental questions by its critical, generally systematic approach and its reliance on rational argument. The word "philosophy" comes from the and mathematics Mathematics is the study of quantity, structure, space, and change. Mathematicians seek out patterns, formulate new conjectures, and establish truth by rigorous deduction from appropriately chosen axioms and definitions.
Methods employed in cognitive neuroscience include experimental paradigms from psychophysics Psychophysics is a discipline within psychology that investigates the relationship between physical stimuli and their subjective correlates, or percepts. Psychophysics has been described as "the scientific study of the relation between stimulus and sensation" or, more completely, as "the analysis of perceptual processes by studying and cognitive psychology Cognitive psychology is a discipline within psychology that investigates the internal mental processes of thought such as visual processing, memory, thinking, learning, feeling, problem solving, and language, functional neuroimaging Functional neuroimaging is the use of neuroimaging technology to measure an aspect of brain function, often with a view to understanding the relationship between activity in certain brain areas and specific mental functions. It is primarily used as a research tool in cognitive neuroscience, cognitive psychology, neuropsychology, and social, electrophysiology Electrophysiology is the study of the electrical properties of biological cells and tissues. It involves measurements of voltage change or electric current on a wide variety of scales from single ion channel proteins to whole organs like the heart. In neuroscience, it includes measurements of the electrical activity of neurons, and particularly, cognitive genomics and behavioral genetics Behavioural genetics is the field of study that examines the role of genetics in animal behaviour. Often associated with the idea of "nature versus nurture", behavioural genetics is highly interdisciplinary, involving contributions from biology, genetics, ethology, psychology, and statistics. Behavioural geneticists study the inheritance. Studies of patients with cognitive deficits due to brain lesions Because the definition of lesion is so broad, the varieties of lesions are virtually endless. They are subsequently classified by their features. If a lesion is caused by a tumor it will be classified as malignant versus benign. Lesions may be classified by the shape they form, as is the case with many ulcers, which can have a bullseye or 'target' constitute an important aspect of cognitive neuroscience (see neuropsychology Neuropsychology is the basic scientific discipline that studies the structure and function of the brain related to specific psychological processes and overt behaviors. The term neuropsychology has been applied to lesion studies in humans and animals. It has also been applied to efforts to record electrical activity from individual cells in higher). Theoretical approaches include computational neuroscience Computational neuroscience is the study of brain function in terms of the information processing properties of the structures that make up the nervous system. It is an interdisciplinary science that links the diverse fields of neuroscience, cognitive science and psychology with electrical engineering, computer science, mathematics and physics and cognitive psychology Cognitive psychology is a discipline within psychology that investigates the internal mental processes of thought such as visual processing, memory, thinking, learning, feeling, problem solving, and language.
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Historical origins
Central to cognitive neuroscience is the view that specific cognitive functions correspond to specific areas of the brain. This view has emerged from various theories. The phrenologist movement failed to supply a scientific basis for their theories and has since been rejected. However, the phrenologist main assumption that specific areas of the brain correspond to specific functions still applies, although today measurements at the skull are carried out electrophysiologically and what is being measured has more to do with the brain than the appearance of the outer skull.
A page from the American Phrenological JournalPhrenology
Main article: Phrenology Phrenology was especially popular from about 1810 until 1840. Following the materialist notions of mental functions originating in the brain, phrenologists believed that human conduct could best be understood in neurological rather than abstract terms. It is now considered a pseudoscience. Developed by German physician Franz Joseph Gall in 1796,The first roots of cognitive neuroscience lie in phrenology, which was a pseudoscientific Pseudoscience is a methodology, belief, or practice that is claimed to be scientific, or that is made to appear to be scientific, but which does not adhere to an appropriate scientific methodology, lacks supporting evidence or plausibility, or otherwise lacks scientific status. The term is inherently pejorative, because it is used to assert that approach that claimed that behavior could be determined by the shape of the scalp The blood supply of the scalp is via five pairs of arteries, three from the external carotid and two from the internal carotid:. In the early 19th century, Franz Joseph Gall Franz Joseph Gall was a neuroanatomist, physiologist, and pioneer in the study of the localization of mental functions in the brain and J. G. Spurzheim believed that the human brain The human brain is the center of the human nervous system and is a highly complex organ. Enclosed in the cranium, it has the same general structure as the brains of other mammals, but is over three times as large as the brain of a typical mammal with an equivalent body size. Most of the expansion comes from the cerebral cortex, a convoluted layer was localized into approximately 35 different sections. In his book, The Anatomy and Physiology of the Nervous System in General, and of the Brain in Particular, Gall claimed that a larger bump in one of these areas meant that that area of the brain was used more frequently by that person. This theory gained significant public attention, leading to the publication of phrenology journals and the creation of phrenometers, which measured the bumps on a human subject's head.
Aggregate field view
Pierre Flourens, a French France is a founding member state of the European Union and is the largest one by area. France has been a major power for several centuries with strong cultural, economic, military and political influence in Europe and in the world. During the 17th and 18th centuries, France colonised great parts of North America; during the 19th and early 20th experimental psychologist, was one of many scientists that challenged the views of the phrenologists. Through his study of living rabbits Rabbits are small mammals in the family Leporidae of the order Lagomorpha, found in several parts of the world. There are seven different genera in the family classified as rabbits, including the European rabbit , cottontail rabbits (genus Sylvilagus; 13 species), and the Amami rabbit (Pentalagus furnessi, an endangered species on Amami Ōshima, and pigeons Pigeons and doves constitute the bird family Columbidae within the order Columbiformes, which include some 300 species of near passerines. In general parlance the terms "dove" and "pigeon" are used somewhat interchangeably. In ornithological practice, there is a tendency for "dove" to be used for smaller species and &, he discovered that lesions Because the definition of lesion is so broad, the varieties of lesions are virtually endless. They are subsequently classified by their features. If a lesion is caused by a tumor it will be classified as malignant versus benign. Lesions may be classified by the shape they form, as is the case with many ulcers, which can have a bullseye or 'target' to particular areas of the brain produced no discernible change in behavior. He proposed the theory that the brain is an aggregate field, meaning that different areas of the brain participated in behavior.
Localizationist view
Studies performed in Europe by scientists such as John Hughlings Jackson John Hughlings Jackson, FRS , was an English neurologist; born at Providence Green, Green Hammerton, near Harrogate, Yorkshire caused the localizationist view to re-emerge as the primary view of behavior. Jackson studied patients with brain damage 'Brain damage' is a term no longer used today and has been replaced in recent decades by 'brain injury' ; meaning the destruction or degeneration of brain cells, often with an implication that the loss is significant in terms of functioning or conscious experience. It is a common and very broad in scope, such that in medicine a vast range of, particularly those with epilepsy Epilepsy (from the Ancient Greek ἐπιληψία — "to seize") is a common chronic neurological disorder characterized by recurrent unprovoked seizures. These seizures are transient signs and/or symptoms of abnormal, excessive or synchronous neuronal activity in the brain. About 50 million people worldwide have epilepsy, with almost 9. He discovered that the epileptic patients often made the same clonic Clonus is a series of involuntary muscular contractions due to sudden stretching of the muscle. Clonus is a sign of certain neurological conditions, and is particularly associated with upper motor neuron lesions such as in stroke, multiple sclerosis, spinal cord damage and hepatic encephalopathy. Unlike the small, spontaneous twitching known as and tonic movements of muscle during their seizures, leading Jackson to believe that they must be occurring in the same place every time. Jackson proposed that specific functions were localized to specific areas of the brain[3], which was critical to future understanding of the brain lobes.
The emergence of neuropsychology
Broca's area and Wernicke's area.In 1861, French neurologist Paul Broca Pierre Paul Broca was a French physician, anatomist, and anthropologist. He was born in Sainte-Foy-la-Grande, Gironde. He is best known for his research on Broca's area, a region of the frontal lobe that has been named after him came across a man who was able to understand language but unable to speak. The man could only produce the sound "tan". It was later discovered that the man had damage to an area of his left frontal lobe now known as Broca's area The production of language has been linked to the Broca’s area since Paul Pierre Broca reported impairments in two patients. They had lost the ability to speak after injury to the posterior inferior frontal gyrus of the brain. Since then, the approximate region he identified has become known as Broca’s area, and the deficit in language. Carl Wernicke Carl Wernicke was a German physician, anatomist, psychiatrist and neuropathologist. He earned his medical degree at the University of Breslau (1870). He died in Germany due to injuries suffered during a bicycle accident, a German A region named Germania, inhabited by several Germanic peoples, has been known and documented before AD 100. Beginning in the 10th century, German territories formed a central part of the Holy Roman Empire, which lasted until 1806. During the 16th century, northern Germany became the centre of the Protestant Reformation. As a modern nation-state, neurologist, found a similar patient, except that this patient could speak fluently but non-sensibly. The patient had been the victim of a stroke A stroke, known medically as a cerebrovascular accident , is the rapidly developing loss of brain function(s) due to disturbance in the blood supply to the brain. This can be due to ischemia (lack of blood flow) caused by blockage (thrombosis, arterial embolism), or a hemorrhage (leakage of blood). As a result, the affected area of the brain is, and could not understand spoken or written language. This patient had a lesion in the area where the left parietal and temporal lobes meet, now known as Wernicke's area Wernicke's area is one of the two parts of the cerebral cortex linked since the late nineteenth century to speech (the other is the Broca's area). It is involved in the understanding of written and spoken language. It is traditionally considered to consist of the posterior section of the superior temporal gyrus in the dominant cerebral hemisphere (. These cases strongly supported the localizationists' views, because a lesion caused a specific behavioral change in both of these patients. The studies of Broca and Wernicke spawned a new research field, which studies the relationship between psychological phenomena and lesions (or otherwise induced deficits) of the brain: neuropsychology.
Mapping the brain
In 1870, German physicians Eduard Hitzig Eduard Hitzig was a German neurologist and neuropsychiatrist born in Berlin and Gustav Fritsch published their findings about the behavior of animals. Hitzig and Fritsch ran an electrical current through the cerebral cortex The cerebral cortex is a sheet of neural tissue that is outermost to the cerebrum of the mammalian brain. It plays a key role in memory, attention, perceptual awareness, thought, language, and consciousness. It is constituted of up to six horizontal layers, each of which has a different composition in terms of neurons and connectivity. The human of a dog The dog is a domesticated form of the gray wolf, a member of the Canidae family of the order Carnivora. The term is used for both feral and pet varieties. The domestic dog has been one of the most widely kept working, hunting and companion animals in human history, causing the dog to produce characteristic movements based on where the current was applied. Since different areas produced different movements, the physicians concluded that behavior was rooted at the cellular level. German neuroanatomist Neuroanatomy is the study of the anatomy of nervous tissue and neural structures of the nervous system. In vertebrates the routes that the myriad nerves take from the brain to the rest of the body , and the internal structure of the brain in particular, are both extremely elaborate. As a result, the study of neuroanatomy has developed into a Korbinian Brodmann Korbinian Brodmann was a German neurologist who became famous for his definition of the cerebral cortex into 52 distinct regions from their cytoarchitectonic (histological) characteristics. These areas are now usually referred to as Brodmann areas. Some of these areas were later associated to nervous functions, such as areas 41 and 42 in the used tissue staining techniques developed by Franz Nissl to see the different types of cells in the brain. Through this study, Brodmann concluded in 1909 that the human brain consisted of fifty-two distinct areas, now named Brodmann areas. Many of Brodmann's distinctions were very accurate, such as differentiating Brodmann area 17 from Brodmann area 18.
The neuron doctrine
Main article: Neuron doctrineIn the early 20th century, Santiago Ramón y Cajal and Camillo Golgi began working on the structure of the neuron. Golgi developed a silver staining method that could entirely stain several cells in a particular area, leading him to believe that neurons were directly connected with each other in one cytoplasm. Cajal challenged this view after staining areas of the brain that had less myelin and discovering that neurons were discrete cells. Cajal also discovered that cells transmit electrical signals down the neuron in one direction only. Both Golgi and Cajal were awarded a Nobel Prize in Physiology or Medicine in 1906 for this work on the neuron doctrine. The neuron doctrine has ever since provided a fundamental theory for understanding neurophysiology.
The birth of cognitive science
On September 11, 1956, a large-scale meeting of cognitivists took place at the Massachusetts Institute of Technology. George A. Miller presented his "The Magical Number Seven, Plus or Minus Two" paper while Noam Chomsky and Newell & Simon presented their findings on computer science. Ulric Neisser commented on many of the findings at this meeting in his 1967 book Cognitive Psychology. The term "psychology" had been waning in the 1950s and 1960s, causing the field to be referred to as "cognitive science". Behaviorists such as Miller began to focus on the representation of language rather than general behavior. David Marr's proposal of the hierarchical representation of memory caused many psychologists to embrace the idea that mental skills required significant processing in the brain, including algorithms.
Cognitive neuroscience
Before the 1980s, interaction between neuroscience and cognitive science was scarce[4]. The term 'cognitive neuroscience' was coined by George Miller and Michael Gazzaniga[4] "in the back seat of a New York City taxi"[5] toward the end of the 1970s. Cognitive neuroscience began to integrate the newly laid theoretical ground in cognitive science, that emerged between the 1950s and 1960s, with approaches in experimental psychology, neuropsychology and neuroscience. (Neuroscience was not established as a unified discipline until 1971[6]). In the very late 20th century new technologies evolved that are now the mainstay of the methodology of cognitive neuroscience, including TMS (1985) and fMRI (1991). Earlier methods used in cognitive neuroscience includes EEG (human EEG 1920) and MEG (1968). Occasionally cognitive neuroscientists utilize other brain imaging methods such as PET and SPECT. In some animals Single-unit recording can be used. Other methods include microneurography, facial EMG, and eye-tracking. Integrative neuroscience attempts to consolidate data in databases, and form unified descriptive models from various fields and scales: biology, psychology, anatomy, and clinical practice.
Cognitive neuroscience topics
- attention
- change blindness
- consciousness
- decision-making
- learning
- memory
- mirror neurons
- mismatch negativity
Cognitive neuroscience methods
Experimental methods of specific psychology fields include:
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Fri, 20 Aug 2010 01:13:52 GMT+00:00
Entrepreneur According to neuroscience studies, the adage that you should "be careful what you ask for" has more teeth to it than you ...
tristan
hu, 01 Jul 2010 18:11:00 GM
found at
Q. By "cognitive science", I mean the interdisciplinary study of how information is represented and transformed in the brain. The disciplines whose overlap I'm particularly interested in are philosophy, (cognitive, developmental and evolutionary) psychology, neuroscience and linguistics. Alternatively, I'd like to know of graduate programs in philosophy or psychology that study (interdisciplinarily) how information is represented and transformed in the brain.
Asked by Said - Fri May 14 12:05:03 2010 - - 1 Answers - 0 Comments
A. UCLA in California is good
Answered by The Deleter - Sat May 22 10:51:41 2010
