Presentation on theme: "More experience = Bigger Brain? By Caroline Filko and Haley Stone."— Presentation transcript:
More experience = Bigger Brain? By Caroline Filko and Haley Stone
Do certain experiences produce physical changes in the brain? Background 1785, Malacarne, an Italian anatomist discovered that the brains of the animals that were trained appeared more complex. Late 19 th century, a study surfaced to relate the circumference of the human head with the amount of learning a person had experienced. Disapproved by later research.
12 sets of three male rats were chosen from the same litter and designated to one of three types of conditions: Experimental Method Impoverished Environment (smaller cage, one isolated rat) Control Group (standard cage, multiple rats) Enriched Environment (large cage, objects to play with, multiple rats)
Denser Cerebral Cortex was found in the enriched rats. Was heavier, thicker, and possessed larger neurons. Greater overall chemical activity of acetyl cholinesterase and the ratio of RNA and DNA Bigger Synapses were found in the enriched rats by 50% Conclusion: Brain anatomy and brain chemistry are changed by experience. Results Enriched rats were vastly different from the impoverished rats!
Different handling of rats responded by handling one litter daily, and not the other. Results remained the same. Stress effects other research that exposed rats to stress cited with no changes in brain development. Artificial environment used wild deer mice as subjects. Proved that a natural environment is more beneficial. Relationship to human subjects research allows scientists to test concepts that may later prove useful to human subjects. Criticism
Study of memory new techniques for improving memory and preventing memory loss Relationship between malnutrition and intelligence theories developed about how malnutrition maybe reduced or enhanced by environmental enrichment or deprivation. Significance of the Study
People unable to have certain experiences will possesses a less developed brain region. Applied to the process of human intellectual development. “ …I found that the people who use their brains don’t lose them. It was that simple.” by Marian Diamond Effects on CHS student development? Study by Ian Sneddon on pigs with operant tasks and rewards. Reapproved the idea of cognitive development based on an enriched environment. “Mozart Effect” children become better learners when listening to Mozart. Claimed as a fad of pop psychology. Recent Applications