mind and brain presented by: sarah c. bradshaw. contributing sciences “the fields of neuroscience...
TRANSCRIPT
Mind and Brain
Presented by: Sarah C. Bradshaw
Contributing Sciences• “The fields of neuroscience and cognitive
science are helping to satisfy this fundamental curiosity about how people think and learn.”
Neuroscience• is the study of all aspects of nerves and the
nervous system, in health and in disease. It includes the anatomy, physiology, chemistry, pharmacology, and pathology of nerve cells;
• the behavioral and psychological features that depend on the function of the nervous system;
• and the clinical disciplines that deal with them, such as neurology, neurosurgery, and psychiatry.
http://www.answers.com/topic/neuroscience?cat=health
Neuroscientist Questions
• “ How does the brain develop?• Are there stages of brain development?• Are there critical periods when certain
things must happen for the brain to develop normally?
• How is the information encoded in the developing and the adult nervous systems?
• How does experience affect the brain?”
Cognitive Science• Cognitive science is the study of the mind. • It is an interdisciplinary science that draws upon
many fields including neuroscience, psychology, philosophy, computer science, artificial intelligence, and linguistics.
• The purpose of cognitive science is to develop models that help explain human cognition -- perception, thinking, and learning.
http://www.medterms.com/script/main/art.asp?articlekey=9257
Caution• “…one must be careful to avoid adopting
faddish concepts that have not been demonstrated to be of value in classroom practice.”– “…concept that the left and right hemispheres
of the brain should be taught separately to maximize the effectiveness of learning.”
Caution• Also, “ the notion that the brain grows in
holistic “spurts” within or around which specific educational objectives should be arranged.”– “…there is significant evidence that brain
regions develop asynchronously.”
Three Main Points• “1) Learning changes the physical structure
of the brain.• 2) These structural changes alter the
functional organization of the brain; in other words, learning organizes and reorganizes the brain.
• 3) Different parts of the brain may be ready to learn at different times.”
Some Basics• “ A nerve cell, or neuron, is a cell that
receives information from other nerve cells or from the sensory organs
• then projects it back to the part of the body that interacts with the environment.”
Some Basics• “Information comes into the cell from
projections called axons.”
• “The junctions through which information passes from one neuron to another are called synapses.”
http://whyfiles.org/250alcohol_brain/index.php?g=3.txt
Synapses• “Synaptic connections are added to the
brain in two basic ways:– The synapses are overproduced, then
selectively lost– Synapses addition
Synapses Overproduction
• “…a fundamental mechanism that the brain uses to incorporate information from experience.”
Synapse Addition
• “….the process of synapse addition operates throughout the entire human life span…”
• “…this process is not only sensitive to experience, it is actually driven by experience.”
Experiences and Environment for Brain Development
• “Alterations in the brain that occur during learning seem to make the nerve cells more efficient or powerful.”– Studies conducted on “complex-environment”
and caged animals show:• That the “complex-environment” animals were
smarter because they had an “increased capacity in the brain that depended on experience.”
Experiences and Environment for Brain Development
• Also, rats that are caged, but provided with a changing environment that encouraged “play and exploration” were better problem solvers.
• “…the interactive presence of a social group and direct physical contact with the environment are important factors…”
• Can the Brain Change Without Learning?
• Page 119
Role of Instruction in Brain Development
• Language and Brain Development– “Language provides a particularly striking
example of how instructional processes may contribute to organizing brain functions.”
Language• “Very young children discriminate many
more phonemic boundaries, than adults, but they lose their discriminatory powers when certain boundaries are not supported by experience with spoken language.”
Language• “ Native Japanese speakers, for example, do
not discriminate the “r” from the “l” sounds that are evident to English speakers, and this ability is lost in early childhood because it is not in the speech they hear.”
Website
• http://www.youtube.com/watch?v=Fcb8nT0QC6o&feature=related
Memory and Brain Processes
• “Memory is neither a single entity nor a phenomenon that occurs in a single area of the brain.”
Memory Process• Declarative memory
– “... memory for facts and events…”
• Procedural or nondeclarative– “…memory for skills and other cognitive
operations…”
Memory• The book states that “when a series of
events are presented in a random sequence, people reorder them into sequences that make sense when they try to recall them.”
Test• I am going to give you a list of words
• Then, I am going to ask you a question about the list
• (this was a study discussed in the book)
• “Sour, candy, sugar, bitter, good, taste, tooth, knife, honey, photo, chocolate, heart, cake, tart, pie”
• Was the word sweet in the list?
Hmmm…..• Ever discussed a shared event with a friend
and one of you remembers something and the other argues that it never happened?– This is due to the brain “using inferencing
processes to relate events.”
Or….
• Page 125
Memory• “… classes of words, pictures, and other
categories of information that involve complex cognitive processing on a repeated basis activate the brain.”
• “ Memory processes treat both true and false memory events similarly and, activate the same brain regions, regardless of the validity of what is being remembered.”
Conclusion• “1) The functional organization of the brain
and the mind depends on and benefits positively from experience.”
• 2) Development is not merely a biologically driven unfolding process, but also an active process that derives essential information from experience.”
Conclusion• 3) Research has shown that some experiences
have the most powerful effects during specific sensitive periods, while others can affect the brain over a much longer time span
• 4) An important issue that needs to be determined in relation to education is which things are tied to critical periods and for which things is the time exposure less critical.”