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LA GRAMMATICA DI ENGLISH GRATIS IN VERSIONE MOBILE   INFORMATIVA PRIVACY

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WIKIBOOKS
DISPONIBILI
?????????

ART
- Great Painters
BUSINESS&LAW
- Accounting
- Fundamentals of Law
- Marketing
- Shorthand
CARS
- Concept Cars
GAMES&SPORT
- Videogames
- The World of Sports

COMPUTER TECHNOLOGY
- Blogs
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- Google
- My Computer

- PHP Language and Applications
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EDUCATION
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LITERATURE
- Masterpieces of English Literature
LINGUISTICS
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- English Dictionaries
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MEDICINE
- Medical Emergencies
- The Theory of Memory
MUSIC&DANCE
- The Beatles
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SCIENCE
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LIFESTYLE
- Cosmetics
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TRADITIONS
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NATURE
- Animals

- Fruits And Vegetables



ARTICLES IN THE BOOK

  1. Active recall
  2. Alzheimer's disease
  3. Amnesia
  4. Anamonic
  5. Anterograde amnesia
  6. Atkinson-Shiffrin memory model
  7. Attention versus memory in prefrontal cortex
  8. Baddeley's Model of Working Memory
  9. Barnes maze
  10. Binding problem
  11. Body memory
  12. Cellular memory
  13. Choice-supportive bias
  14. Chunking
  15. Clive Wearing
  16. Commentarii
  17. Confabulation
  18. Cue-dependent forgetting
  19. Decay theory
  20. Declarative memory
  21. Eidetic memory
  22. Electracy
  23. Emotion and memory
  24. Encoding
  25. Engram
  26. Episodic memory
  27. Executive system
  28. Exosomatic memory
  29. Explicit memory
  30. Exposure effect
  31. Eyewitness memory reconstruction
  32. False memory
  33. False Memory Syndrome Foundation
  34. Flashbulb memory
  35. Forgetting
  36. Forgetting curve
  37. Functional fixedness
  38. Hindsight bias
  39. HM
  40. Human memory process
  41. Hyperthymesia
  42. Iconic memory
  43. Interference theory
  44. Involuntary memory
  45. Korsakoff's syndrome
  46. Lacunar amnesia
  47. Limbic system
  48. Linkword
  49. List of memory biases
  50. Long-term memory
  51. Long-term potentiation
  52. Lost in the mall technique
  53. Memory
  54. Memory and aging
  55. MemoryArchive
  56. Memory consolidation
  57. Memory distrust syndrome
  58. Memory inhibition
  59. Memory span
  60. Method of loci
  61. Mind map
  62. Mnemonic
  63. Mnemonic acronym system
  64. Mnemonic dominic system
  65. Mnemonic link system
  66. Mnemonic major system
  67. Mnemonic peg system
  68. Mnemonic room system
  69. Mnemonic verses
  70. Mnemonist
  71. Philip Staufen
  72. Phonological loop
  73. Picture superiority effect
  74. Piphilology
  75. Positivity effect
  76. Procedural memory
  77. Prospective memory
  78. Recollection
  79. Repressed memory
  80. Retrograde amnesia
  81. Retrospective memory
  82. Rosy retrospection
  83. Self-referential encoding
  84. Sensory memory
  85. Seven Meta Patterns
  86. Shass pollak
  87. Short-term memory
  88. Source amnesia
  89. Spaced repetition
  90. SuperMemo
  91. Synthetic memory
  92. Tally sticks
  93. Testing effect
  94. Tetris effect
  95. The Courage to Heal
  96. The Magical Number Seven, Plus or Minus Two
  97. Tip of the tongue
  98. Visual memory
  99. Visual short term memory
  100. Visuospatial sketchpad
  101. VTrain
  102. Working memory


 

 
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    ENGLISHGRATIS.COM è un sito personale di
    Roberto Casiraghi e Crystal Jones
    email: robertocasiraghi at iol punto it

    Roberto Casiraghi           
    INFORMATIVA SULLA PRIVACY              Crystal Jones


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THE THEORY OF MEMORY
This article is from:
http://en.wikipedia.org/wiki/Attention_versus_memory_in_prefrontal_cortex

All text is available under the terms of the GNU Free Documentation License: http://en.wikipedia.org/wiki/Wikipedia:Text_of_the_GNU_Free_Documentation_License 

Attention versus memory in prefrontal cortex

From Wikipedia, the free encyclopedia

 

A widely accepted theory regarding the function of the brain's prefrontal cortex is that it serves as a store of short-term memory. This idea was first formulated by Jacobsen, who reported in 1935 that damage to the primate prefrontal cortex caused short-term memory deficits. Karl Pribram and colleagues (1952) identified the part of the prefrontal cortex responsible for this deficit as area 46, also known as the dorsolateral prefrontal cortex (dlPFC). More recently, Goldman-Rakic and colleagues (1993) evoked short-term memory loss in localized regions of space by temporary inactivation of portions of the dlPFC. Once the concept of working memory (see also Baddeley's Model of Working Memory) was established in contemporary neuroscience by Baddeley (1986), these neuropsychological findings contributed to the theory that the prefrontal cortex implements working memory and, in some extreme formulations, only working memory. In the 1990s this theory developed a wide following, and it became the predominant theory of PF function, especially for nonhuman primates. The concept of working memory used by proponents of this theory focused mostly on the short-term maintenance of information, and rather less on the manipulation or monitoring of such information or on the use of that information for decisions. Consistent with the idea that the prefrontal cortex functions predominantly in maintenance memory, delay-period activity in the PF has often been interpreted as a memory trace. (The phrase "delay-period activity" applies to neuronal activity that follows the transient presentation of an instruction cue and persists until a subsequent “go” or “trigger” signal.)

NIMH researchers Mikhail Lebedev, Adam Messinger, Jerald Kralik and Steven Wise challenged the working memory theory of prefrontal cortex function in the paper that they published in PLoS Biology (Lebedev, M.A., Messinger, A., Kralik, J.D., Wise, S.P. (2004) Representation of attended versus remembered locations in prefrontal cortex. PLoS Biology, 2: 1919-1935.) To explore alternative interpretations of delay-period activity in the prefrontal cortex, they investigated the discharge rates of single prefrontal neurons as monkeys attended to a stimulus marking one location while remembering a different, unmarked location. Both locations served as potential targets of a saccadic eye movement. Although the task made intensive demands on short-term memory, the largest proportion of prefrontal neurons represented attended locations, not remembered ones. These findings showed that short-term memory functions cannot account for all, or even most, delay-period activity in the part of the prefrontal cortex explored. The authors suggested that prefrontal activity during the delay-period contributes more to the process of attentional selection (and selective attention) than to memory storage.

Image:Attention_vs_memory.gif

Lebedev et al. experiment that dissociated representation of spatial attention from representation of spatial memory in prefrontal cortex

Suggested Reading

  • Baddeley A (1986) Working memory. Oxford: Oxford University Press. 289 p.
  • Funahashi S, Bruce CJ, Goldman-Rakic PS (1993a) Dorsolateral prefrontal lesions and oculomotor delayed-response performance: Evidence for mnemonic “scotomas.”. J Neurosci 13: 1479–1497.
  • Jacobsen CF (1936) Studies of cerebral function in primates. I. The functions of the frontal associations areas in monkeys. Comp Psychol Monogr 13: 3–60.
  • Lebedev MA, Messinger A, Kralik JD, Wise SP (2004) Representation of attended versus remembered locations in prefrontal cortex. PLoS Biology, 2: 1919-1935.
  • Postle BR, Druzgal TJ, D'Esposito M (2003) Seeking the neural substrates of visual working memory storage. Cortex 39: 927–946.
  • Pribram KH, Mishkin M, Rosvold HE, Kaplan SJ (1952) Effects of delayed-response performance of lesions of dorsolateral and ventromedial frontal cortex of baboons. J Comp Physiol Psychol 45: 565–575.
Retrieved from "http://en.wikipedia.org/wiki/Attention_versus_memory_in_prefrontal_cortex"