How the environment affects the brain

Download How the environment affects the brain

Post on 08-Feb-2016

40 views

Category:

Documents

0 download

Embed Size (px)

DESCRIPTION

How the environment affects the brain. Not only can the brain determine and change behaviour, but behaviour and environment can change the brain. Brain plasticity. Before 1960s, the brain was thought to be unchangeable After, the view has changed through many studies on humans and animals. - PowerPoint PPT Presentation

TRANSCRIPT

How the environment affects the brain

How the environment affects the brainNot only can the brain determine and change behaviour, but behaviour and environment can change the brainBrain plasticityBefore 1960s, the brain was thought to be unchangeable

After, the view has changed through many studies on humans and animals.

Brain plasticity: the brains ability to change due to learning or experience

Brain plasticityEnvironmental input can modify the brain, especially the cerebral cortex, which is the area of higher cognitive functioning

The brain adapts to the New challengesHigh levels of stimulation and numerous learning opportunities at the appropriate times lead to an increase in the density of neural connections

Dendritic branchingThe dendrites of the neurons grow in numbers and connect with other neurons, becauseEvery time we learn something new, the neurons connect to create a new trace in the brain.Example: if you spend a lot of time studying, compared to someone who doesnt should have a thicker area in the cortex related to that knowledge.Example of someone who did not get a of of stimulation: GenieRosenzweig and Bennet (1972)Study on rats (animal experiments)Enriched (toys) and deprived environment (no toys)30-60 daysPost-mortem studiesResults: one group had increased thickness in the cortex, frontal lobe (the thickest if they also had company (other rats))An example of the Brains plasticityhttp://www.youtube.com/watch?v=TSu9HGnlMV0