António Damásio António Rosa Damásio, GOSE is a Portuguese behavioral neurologist and neuroscientist living and working in the United States. He is David Dornsife Professor of Neuroscience at the University of Southern California, where he heads USC's Brain and Creativity Institute. Prior to taking up his posts at USC, in 2005, Damásio was M.W. Van Allen Phineas Gage Phineas P. Gage [n 2] was an American railroad construction foreman now remembered for his incredible survival of an accident in which a large iron rod was driven completely through his head, destroying much of his brain's left frontal lobe, and for that injury's reported effects on his personality and behavior—effects so profound that friends Norman Geschwind Norman Geschwind can be considered the father of modern behavioral neurology in America. He was mentor to the cadre of behavioral neurologists who would shape the subspecialty for the 20th and early 21st centuries Elkhonon Goldberg Elkhonon Goldberg is a neuropsychologist and cognitive neuroscientist known for his work in hemispheric specialization and the "novelty-routinization" theory Patricia Goldman Rakic Patricia Goldman-Rakic (born Patricia Shoer) (April 22, 1937 – July 31, 2003) was an American neuroscientist/neurobiologist known for her pioneering study of the frontal lobe and her work on the cellular basis of working memory Pasko Rakic Pasko Rakic is a neuroscientist at Yale University. Rakic has been elected to the National Academy of Sciences USA, the American Academy of Arts and Sciences, and the Presidency of the Society for Neuroscience. He was a co-recipient, with Thomas Jessell and Sten Grillner, of the inaugural Kavli Prize for Neuroscience in 2008.. He is also a foreign Donald O. Hebb Donald Olding Hebb was a Canadian psychologist who was influential in the area of neuropsychology, where he sought to understand how the function of neurons contributed to psychological processes such as learning. He has been described as the father of neuropsychology and neural networks Kenneth Heilman He attended the University of Virginia and graduated from the University of Virginia School of Medicine in 1963 Edith Kaplan Edith Kaplan was a respected pioneer of neuropsychological tests who did most of her work at the Boston VA Hospital. Throughout her 50-year career in psychology, Dr. Edith Kaplan made invaluable contributions to the promotion of clinical neuropsychology as a specialty area in psychology. Her impact on our field is widespread, and encompasses many Muriel Lezak Muriel Deutsch Lezak is an American neuropsychologist best known for her book Neuropsychological Assessment, widely accepted as the standard in the field. She holds bachelor's and master's degrees from the University of Chicago, and earned a Ph.D. from the University of Portland in 1960 Benjamin Libet Benjamin Libet (April 12, 1916 - July 23, 2007) was a researcher in the physiology department of the University of California, San Francisco, and a pioneering scientist in the field of human consciousness. In 2003, he was the first recipient of the Virtual Nobel Prize in Psychology from the University of Klagenfurt, "for his pioneering Rodolfo Llinás Rodolfo R. Llinás is the Thomas and Suzanne Murphy Professor of Neuroscience and Chairman of the department of Physiology & Neuroscience at the NYU School of Medicine. He went to the Gimnasio Moderno school and received his MD from the Universidad Javeriana, Bogotá in 1959 and his PhD in 1965 from the Australian National University working Alexander Luria Alexander Romanovich Luria was a famous Soviet neuropsychologist and developmental psychologist. He was one of the founders of cultural-historical psychology and psychological activity theory Brenda Milner Brenda Milner, CC, GOQ, FRS has contributed extensively to the research literature on various topics in the field of clinical neuropsychology Karl H. Pribram Karl H. Pribram is a professor at Georgetown University , and an emeritus professor of psychology and psychiatry at Stanford University and Radford University. Board-certified as a neurosurgeon, Pribram did pioneering work on the definition of the limbic system, the relationship of the frontal cortex to the limbic system, the sensory-specific & Oliver Sacks Oliver Wolf Sacks, CBE , is a British neurologist residing in New York City. He is a professor of neurology and psychiatry at Columbia University, where he also holds the position of Columbia Artist. He previously spent many years on the clinical faculty of Yeshiva University's Albert Einstein College of Medicine Mark Rosenzweig Mark Richard Rosenzweig was an American research psychologist who found in animal studies on neuroplasticity that the brain continues developing anatomically, reshaping and repairing itself into adulthood based on life experiences, overturning the conventional wisdom that the brain reached full maturity in childhood Roger W. Sperry Roger Wolcott Sperry was a neuropsychologist, neurobiologist and Nobel laureate who, together with David Hunter Hubel and Torsten Nils Wiesel, won the 1981 Nobel Prize in Medicine for his work with split-brain research

Benton Visual Retention Test The Benton Visual Retention Test is an individually administered test for ages 8-adult that measures visual perception and visual memory . It can also be used to help identify possible learning disabilities. The child is shown 10 designs, one at a time, and asked to reproduce each one as exactly as possible on plain paper from memory. The test is Clinical Dementia Rating The Clinical Dementia Rating or CDR is a numeric scale used to quantify the severity of symptoms of dementia Continuous Performance Task A Continuous Performance Task/Test, or CPT, is a psychological test which measures a person's sustained and selective attention and impulsivity. Sustained attention is the ability to maintain a consistent focus on some continuous activity or stimuli, and is associated with impulsivity. Selective attention is the ability to focus on relevant Glasgow Coma Scale Glasgow Coma Scale or GCS is a neurological scale that aims to give a reliable, objective way of recording the conscious state of a person for initial as well as subsequent assessment. A patient is assessed against the criteria of the scale, and the resulting points give a patient score between 3 and either 14 (original scale) or 15 (the more Hayling and Brixton tests The Hayling and Brixton tests are neuropsychological tests of executive function created by psychologists Paul W. Burgess and Tim Shallice Johari window A Johari window is a cognitive psychological tool created by Joseph Luft and Harry Ingham in 1955 in the United States, used to help people better understand their interpersonal communication and relationships. It is used primarily in self-help groups and corporate settings as a heuristic exercise Lexical decision task The lexical decision task is a procedure used in many psychology and psycholinguistics experiments. The basic procedure involves measuring how quickly people classify stimuli as words or nonwords. Although versions of the task had been used by researchers for a number of years, the term lexical decision task was coined by David E. Meyer and Roger Mini-mental state examination The mini-mental state examination or Folstein test is a brief 30-point questionnaire test that is used to screen for cognitive impairment. It is commonly used in medicine to screen for dementia. It is also used to estimate the severity of cognitive impairment at a given point in time and to follow the course of cognitive changes in an individual Stroop effect In psychology, the Stroop effect is a demonstration of the reaction time of a task. When the name of a color is printed in a color not denoted by the name (e.g., the word "red" printed in blue ink instead of red ink), naming the color of the word takes longer and is more prone to errors than when the color of the ink matches the name of Wechsler Adult Intelligence Scale The Wechsler Adult Intelligence Scale intelligence quotient (IQ) tests are the primary clinical instruments used to measure adult and adolescent intelligence. The original WAIS (Form I) was published in February 1955 by David Wechsler, as a revision of the Wechsler-Bellevue Intelligence Scale. The fourth edition of the test (WAIS-IV) was released

In 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, memory is an organism's ability to store, retain, and recall information Information, in its most restricted technical sense, is an ordered sequence of symbols. As a concept, however, information has many meanings. Moreover, the concept of information is closely related to notions of constraint, communication, control, form, instruction, knowledge, meaning, mental stimulus, pattern, perception, and representation and experiences. Traditional studies of memory began in the fields of 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, including technique of artificially enhancing the memory A mnemonic device is a mind memory and/or learning aid. Commonly, mnemonics are verbal—such as a very short poem or a special word used to help a person remember something—but may be visual, kinesthetic or auditory. Mnemonics rely on associations between easy-to-remember constructs which can be related back to the data that is to be remembered. The late nineteenth and early twentieth century put memory within the paradigms The word paradigm —such that it represents a union between intelligent inquiry and some particular kind of world view. The term has been used in linguistics and science to describe distinct concepts. It comes from Greek "παράδειγμα" (paradeigma), "pattern, example, sample" from the verb "παραδείκνυμι of 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. In recent decades, it has become one of the principal pillars of a branch of science called cognitive neuroscience Cognitive neuroscience is an academic field concerned with the scientific study of biological substrates underlying cognition, 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 and, an interdisciplinary link between 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 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.

Processes

From an information processing Information processing is the change of information in any manner detectable by an observer. As such, it is a process which describes everything which happens (changes) in the universe, from the falling of a rock (a change in position) to the printing of a text file from a digital computer system. In the latter case, an information processor is perspective there are three main stages in the formation and retrieval of memory:

• Encoding In the study of memory, encoding is the processing of physical sensory input into one's memory. It is considered the first of three steps in memory information processing; the remaining two steps are storage and retrieval. During memory encoding, information may be processed about space, time, and frequency through automatic processing or or registration (receiving, processing and combining of received information)
• Storage The human memory has three processes: encoding , storage (throughput) and retrieval(output). Storage is the process of retaining information whether in the sensory memory, the short-term memory or the more permanent long-term memory (creation of a permanent record of the encoded information)
• Retrieval Recall in memory refers to the retrieval of events or information from the past. Along with encoding and storage, it is one of the three core processes of memory. There are three main types of recall: free recall, cued recall and serial recall. Psychologists test these forms of recall as a way to study the memory processes of humans and animals, recall or recollection (calling back the stored information in response to some cue for use in a process or activity)

Sensory memory

Sensory memory corresponds approximately to the initial 200–500 milliseconds A millisecond is a thousandth (1/1,000) of a second after an item is perceived. The ability to look at an item, and remember what it looked like with just a second of observation, or memorisation, is an example of sensory memory. With very short presentations, participants often report that they seem to "see" more than they can actually report. The first experiments exploring this form of sensory memory were conducted by George Sperling (1960) using the "partial report paradigm". Subjects were presented with a grid of 12 letters, arranged into three rows of four. After a brief presentation, subjects were then played either a high, medium or low tone, cuing them which of the rows to report. Based on these partial report experiments, Sperling was able to show that the capacity of sensory memory was approximately 12 items, but that it degraded very quickly (within a few hundred milliseconds). Because this form of memory degrades so quickly, participants would see the display, but be unable to report all of the items (12 in the "whole report" procedure) before they decayed. This type of memory cannot be prolonged via rehearsal.

Short-term

Short-term memory allows recall for a period of several seconds to a minute without rehearsal. Its capacity is also very limited: George A. Miller (1956), when working at Bell Laboratories, conducted experiments showing that the store of short-term memory was 7±2 items (the title of his famous paper, "The magical number 7±2"). Modern estimates of the capacity of short-term memory are lower, typically on the order of 4–5 items,^[1] however, memory capacity can be increased through a process called chunking.^{[citation needed]} For example, in recalling a ten-digit telephone number, a person could chunk the digits into three groups: first, the area code (such as 215), then a three-digit chunk (123) and lastly a four-digit chunk (4567). This method of remembering telephone numbers is far more effective than attempting to remember a string of 10 digits; this is because we are able to chunk the information into meaningful groups of letters. Herbert Simon showed that the ideal size for chunking letters and numbers, meaningful or not, was three.^{[citation needed]} This may be reflected in some countries in the tendency to remember telephone numbers as several chunks of three numbers with the final four-number groups, generally broken down into two groups of two.

Short-term memory is believed to rely mostly on an acoustic code for storing information, and to a lesser extent a visual code. Conrad (1964)^[2] found that test subjects had more difficulty recalling collections of words that were acoustically similar (e.g. dog, hog, fog, bog, log).

However, some individuals have been reported to be able to remember large amounts of information, quickly, and be able to recall that information in seconds.^{[citation needed]}

Long-term

The storage in sensory memory and short-term memory generally have a strictly limited capacity and duration, which means that information is available only for a certain period of time, but is not retained indefinitely. By contrast, long-term memory can store much larger quantities of information for potentially unlimited duration (sometimes a whole life span). Its capacity is immeasurably large. For example, given a random seven-digit number, we may remember it for only a few seconds before forgetting, suggesting it was stored in our short-term memory. On the other hand, we can remember telephone numbers for many years through repetition; this information is said to be stored in long-term memory.

While short-term memory encodes information acoustically, long-term memory encodes it semantically^{[citation needed]}: Baddeley (1966)^[3] discovered that after 20 minutes, test subjects had the most difficulty recalling a collection of words that had similar meanings (e.g. big, large, great, huge).

Short-term memory is supported by transient patterns of neuronal communication, dependent on regions of the frontal lobe (especially dorsolateral prefrontal cortex) and the parietal lobe. Long-term memories, on the other hand, are maintained by more stable and permanent changes in neural connections widely spread throughout the brain. The hippocampus is essential (for learning new information) to the consolidation of information from short-term to long-term memory, although it does not seem to store information itself. Without the hippocampus, new memories are unable to be stored into long-term memory, and there will be a very short attention span. Furthermore, it may be involved in changing neural connections for a period of three months or more after the initial learning. One of the primary functions of sleep is thought to be improving consolidation of information, as several studies have demonstrated that memory depends on getting sufficient sleep between training and test. Additionally, data obtained from neuroimaging studies have shown activation patterns in the sleeping brain which mirror those recorded during the learning of tasks from the previous day, suggesting that new memories may be solidified through such rehearsal.

Models

Models of memory provide abstract representations of how memory is believed to work. Below are several models proposed over the years by various psychologists. Note that there is some controversy as to whether there are several memory structures, for example, Tarnow (2005) finds that it is likely that there is only one memory structure between 6 and 600 seconds.

Atkinson-Shiffrin model

The multi-store model (also known as Atkinson-Shiffrin memory model) was first recognised in 1968 by Atkinson and Shiffrin.

The multi-store model has been criticised for being too simplistic. For instance, long-term memory is believed to be actually made up of multiple subcomponents, such as episodic and procedural memory. It also proposes that rehearsal is the only mechanism by which information eventually reaches long-term storage, but evidence shows us capable of remembering things without rehearsal.

The model also shows all the memory stores as being a single unit whereas research into this shows differently. For example, short-term memory can be broken up into different units such as visual information and acoustic information. Patient KF proves this. Patient KF was brain damaged and had problems with his short term memory. He had problems with things such as spoken numbers, letters and words and with significant sounds (such as doorbells and cats meowing). Other parts of short term memory were unaffected, such as visual (pictures).^[4]

It also shows the sensory store as a single unit whilst we know that the sensory store is split up into several different parts such as taste, vision, and hearing.

Working memory

In 1974 Baddeley and Hitch proposed a working memory model which replaced the concept of general short term memory with specific, active components. In this model, working memory consists of three basic stores: the central executive, the phonological loop and the visuo-spatial sketchpad. In 2000 this model was expanded with the multimodal episodic buffer.^[5]

The central executive essentially acts as attention. It channels information to the three component processes: the phonological loop, the visuo-spatial sketchpad, and the episodic buffer.

The phonological loop stores auditory information by silently rehearsing sounds or words in a continuous loop: the articulatory process (for example the repetition of a telephone number over and over again). Then, a short list of data is easier to remember.

The visuospatial sketchpad stores visual and spatial information. It is engaged when performing spatial tasks (such as judging distances) or visual ones (such as counting the windows on a house or imagining images).

The episodic buffer is dedicated to linking information across domains to form integrated units of visual, spatial, and verbal information and chronological ordering (e.g., the memory of a story or a movie scene). The episodic buffer is also assumed to have links to long-term memory and semantical meaning.

The working memory model explains many practical observations, such as why it is easier to do two different tasks (one verbal and one visual) than two similar tasks (e.g., two visual), and the aforementioned word-length effect. However, the concept of a central executive as noted here has been criticised as inadequate and vague.^{[citation needed]}

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