Why motivation to learn declines with age
Many mental health disorders can skew the ability to evaluate the cost and rewards of an action, such as anxiety and depression.
A depressed person may undervalue potentially rewarding experiences.
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Dopamine plays many roles in the brain. It is related to movement, motivation, and reinforcement of behavior.
Dopamine appears to exert significant effects in two regions of the brain...
Dopamine, like other neurotransmitters, helps neurons communicate with each other over short distances. Most of the brain's dopamine is produced in the midbrain by neurons that connect to the striatum.
High dopamine concentrations do not make the neurons more active. However, they do make the neurons remain active for a more extended period of time, suggesting a longer response to the reward. It may have something to do with how dopamine promotes learning, which is one of its main functions.
Researchers set out to determine if dopamine might affect more distant locations in the brain.
The regions that showed the most significant surges in activity in response to dopamine were the motor cortex and the insular cortex. The findings can help researchers understand the effects of dopamine in the human brain, including its roles in addiction and learning.
Even with massive amounts of information drowning our senses, we can focus on what is important and take action.
The brain’s ability to focus on a particular signal while filtering out the...
The brain’s ability to focus on one thing while obscuring, curbing or reducing the signal strength of other (presumably unwanted) stimuli can be dangerous if those turn out to be unexpectedly important.
The brain, evolved as it is, has a unique way to handle this issue, by reducing the signal strength of the focused object about four times per second, suppressing what’s important to focus on the other signals, some of which may also be important. The brain is already wired to blink.
It's possible to be completely isolated and feel invigorated.
It is also possible to be surrounded by a crowd or be accompanied by close friends and feel lonely.