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Plasticity:

Neuroplasticity and related concepts in Cognition

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This presentation is about Neuroplasticity, its types and introduction to how memory is built and one Cognition disorder with Plasticity, Synesthesia

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Page 1: Neuroplasticity and related concepts in Cognition

Plasticity:

Page 2: Neuroplasticity and related concepts in Cognition

Plasticity Neuroplasticity is a non-specific neuroscience term referring to the ability of the brain and nervous system in all species to change structurally and functionally as a result of input from the environment. Plasticity occurs on a variety of levels, ranging from cellular changes involved in learning, to large-scale changes involved in cortical remapping in response to injury. The most widely recognized forms of plasticity are learning, memory, and recovery from brain damage. (Wikipedia)

Page 3: Neuroplasticity and related concepts in Cognition

The period of susceptibility to the

physiological effects of unilateral eye

closure in kittens

D. H. Hubel and T. N. Wiesel

Hubel and Wiesel had demonstrated that

ocular dominance columns in the lowest

neocortical visual area, V1, were largely

immutable after the critical period in

development

Page 4: Neuroplasticity and related concepts in Cognition

Synaptic Plasticity In neuroscience, synaptic plasticity is the ability of the connection, or synapse, between two neurons to change in strength in response to either use or disuse of transmission over synaptic pathways. Plastic change also results from the alteration of the number of receptors located on a synapse. There are several underlying mechanisms that cooperate to achieve synaptic plasticity, including changes in the quantity of neurotransmitters released into a synapse and changes in how effectively cells respond to those neurotransmitters. Synaptic plasticity in both excitatory and inhibitory synapses has been found to be dependent upon calcium. Since memories are postulated to be represented by vastly interconnected networks of synapses in the brain, synaptic plasticity is one of the important neurochemical foundations of learning and memory (Wikipedia)

Page 5: Neuroplasticity and related concepts in Cognition

Metaplasticity Metaplasticity is a term originally coined by W.C. Abraham and M.F. Bear to refer to the plasticity of synaptic plasticity. Until that time synaptic plasticity had referred to the plastic nature of individual synapses. However this new form referred to the plasticity of the plasticity itself, thus the term meta-plasticity. The idea is that the synapse's previous history of activity determines its current plasticity. This may play a role in some of the underlying mechanisms thought to be important in memory and learning such as Long-term potentiation (LTP), Long-term Depression (LTD) and so forth. (Wikipedia)

Page 6: Neuroplasticity and related concepts in Cognition

Another belief A third school of thought exists which beliefs that structures are not existent and created with experience. It encompasses neuronal formations in adulthood(??) and formations of new connections against existent belief of activation of inactive synapses.

Page 7: Neuroplasticity and related concepts in Cognition

Relations between Thoughts

Concepts: Water, lake, building, tree,

park, public, nation, tax, research

grant, 1,2-dimethyl hydrazine

Abstractions: Happiness, Sleep,

Hallucination, Victory, Virtual,

Research, Relationship

Page 8: Neuroplasticity and related concepts in Cognition

So, How memory solves this?

Page 9: Neuroplasticity and related concepts in Cognition

But these?

Page 10: Neuroplasticity and related concepts in Cognition

The act of relating pictures, sounds and

clips in the memory to emotions,

expressions and inputs are central to

Cognition.

Thus, a child psychology is different

from adult psychology.

Page 11: Neuroplasticity and related concepts in Cognition

Synesthesia (also spelled synæsthesia or synaesthesia, plural synesthesiae or synaesthesiae), from the ancient Greek σύν (syn), "together," and αἴσθησις (aisthēsis), "sensation," is a neurologically based condition in which stimulation of one sensory or cognitive pathway leads to automatic, involuntary experiences in a second sensory or cognitive pathway. People who report such experiences are known as synesthetes. Why and when? Synesthesia runs strongly in families, but the precise mode of inheritance has yet to be ascertained. Synesthesia is also sometimes reported by individuals under the influence of psychedelic drugs, after a stroke, during a temporal lobe epilepsy seizure, or as a result of blindness or deafness. Synesthesia that arises from such non-genetic events is referred to as "adventitious synesthesia" to distinguish it from the more common congenital forms of synesthesia. Adventitious synesthesia involving drugs or stroke (but not blindness or deafness) apparently only involves sensory linkings such as sound → vision or touch → hearing; there are few, if any, reported cases involving culture-based, learned sets such as graphemes, lexemes, days of the week, or months of the year.(Wikipedia)

Page 12: Neuroplasticity and related concepts in Cognition

Types of Synesthesia In one common form of synesthesia, known as grapheme → color synesthesia or color-graphemic synesthesia, letters or numbers are perceived as inherently colored, while in ordinal linguistic personification, numbers, days of the week and months of the year evoke personalities. In spatial-sequence, or number form synesthesia, numbers, months of the year, and/or days of the week elicit precise locations in space (for example, 1980 may be "farther away" than 1990), or may have a (three-dimensional) view of a year as a map (clockwise or counterclockwise). Yet another recently identified type, visual motion → sound synesthesia, involves hearing sounds in response to visual motion and flicker. Over 60 types of synesthesia have been reported, but only a fraction have been evaluated by scientific research. Even within one type, synesthetic perceptions vary in intensity and people vary in awareness of their synesthetic perceptions. (Wikipedia)

Page 13: Neuroplasticity and related concepts in Cognition

Thinking question:

Whether the brain correlates involuntarily or is formation of new relationship is faulty?