10. Going Pains

Why do many people find comfort in the idea that the brain is not fully developed until age 25?

It gives an explanation for poor decisions made in their 20s.

Why is the idea that the brain finishes developing at 25 considered an oversimplification?

Brain development is much more complex and does not suddenly finish at one age.

What did a 1999 brain study discover?

That grey matter undergoes pruning, removing unused connections and strengthening useful ones.

What is grey matter responsible for?

Thinking and processing information.

What happens during grey matter pruning?

Unused neural connections are removed while important ones become stronger.

How did scientists originally explain brain development after the 1999 study?

They believed development continued until around age 25.

Why did scientists assume the brain finished developing at 25?

Because the research data ended at age 20 and showed development patterns in the frontal lobe.

In what direction do brain regions develop in the frontal lobe?

From back to front.

What develops first in the frontal lobe?

Basic movement abilities.

What develops later in the frontal lobe?

Advanced social abilities.

How does current neuroscience view brain development differently?

It studies the brain as a whole rather than isolated parts.

What type of brain structure is analysed to study brain connectivity?

White matter.

What does white matter do?

It connects different areas of the brain through neural pathways.

What age range does current neuroscience associate with adolescence?

Ages 9 to 32.

What two processes does the adolescent brain balance?

Segregation and integration.

What is segregation in brain development?

The process of building separate "neighbourhoods" of related thoughts.

What is integration in brain development?

The process of building connections or "highways" between different thought areas.

What is small worldness?

A measurement of how interconnected the brain is.

What does higher small worldness indicate?

More connections between different brain regions.

What does small worldness correlate with?

Brain age and development.

According to current neuroscience, when is the brain still being constructed?

Until around age 32.

What is neuroplasticity?

The brain's ability to change and improve through experience.

When is structural brain growth most effective?

From ages 9 to 32.

What activities improve neuroplasticity?

Exercise and cognitively demanding tasks or hobbies.

What negatively affects brain development?

Chronic stress.

What does it mean that modern culture is "teenocratic"?

It is influenced and governed by the tastes of younger generations.

What movement contributed to the creation of teenage culture?

The anti-child labour movement.

How did compulsory public education influence teenagers?

It allowed teenagers to create their own social world and culture.

How did the post-war economic boom affect teenagers?

Families spent more money on fewer children, increasing investment in young people.

How did cars influence teenage culture?

They increased independence and helped grow high school subcultures.

How did increased leisure time affect teenagers?

It encouraged experimentation and exploration.

How were teenagers described because they did not fit traditional rituals?

Cultural vagabonds.

Who was J. Edgar Hoover?

The FBI director who warned about teenage crime.

What did J. Edgar Hoover publish about teenagers?

An FBI report warning about teenager-committed crimes.

Who was Fredric Wertham?

A critic who strongly opposed comic books.

What did Fredric Wertham believe about Superman?

He believed Superman represented fascist ideas.

How are teenagers different from children and adults?

They have greater pleasure sensitivity and a stronger desire for "coolness."

What is "coolness" among teenagers defined as?

Positive rebellion.

How has the idea of coolness changed from the 1980s and 1990s to today?

Social media has made it more powerful than logos and brands.

How do teenagers usually view rules?

Rules are wrong until proven otherwise.

Why are teenagers considered a motor of culture?

They seek novelty and create new trends.

What did Corra Harris write about teenagers in 1932?

That society had made life too easy for them but they could still achieve great things.

What comparison did Corra Harris make about teenagers?

She compared them to the people who tamed the wilderness.

What did Arnold L. Horelick write about teenagers in 1947?

Teenagers who did not fight in World War II felt like a lost generation.

Why did some teenagers feel like outcasts after World War II?

They had experienced freedom and spending power during the war and struggled to find belonging afterward.

What did Carol Spicer argue in 1958?

That "boys will be boys" should not excuse all teenage behaviour.

What did Socrates think about teenagers?

He criticised them as foolish and problematic.

What did Edward T. Hall argue about teenagers?

Adults should recognise when teenagers achieve inner peace.

Who studied adolescence in animals with Barbara Natterson-Horowitz?

Rachna Reddy.

Why do many adolescent animals leave their families?

To avoid inbreeding.

What challenges do adolescent animals face after leaving home?

Long-distance travel, exploring new places, and predator exposure.

Why are adolescent animals more flexible?

They need to adapt to unfamiliar environments.

Why are adolescents better learners?

They are more open to new experiences.

What is the "instinct to learn"?

The natural tendency of young animals to observe and develop new skills.

How do hummingbirds learn songs?

They choose songs from adults and practise until developing their own.

Why do adolescent otters swim among sharks?

To learn predator patterns.

What challenge do adolescent female chimpanzees face?

Finding a place in a new social hierarchy.

What did Rachna discover about adolescent female chimps?

They must enter hostile groups and establish themselves socially.

Why is studying animal adolescence useful for humans?

It helps us understand when intervention is needed.

What does adolescence represent according to the animal studies?

A period of high plasticity.

When was the term "teenager" first used?

Before World War II.

When did the term "teenager" become widely used?

After 1945.

What was "Teen-age Triumphs" in 1945?

A clothing feature in Sketch magazine aimed at teenagers.

How did "Teen-age Triumphs" portray teenagers?

Positively, by celebrating teenage fashion and youth.

What did the Milo advertisement in the 1950s suggest about teenagers?

It reflected negative attitudes and fears about teenage behaviour.

What concern did a woman express in a letter to The Mirror?

She was worried about changes in her son.

How did Mary Brown respond to parents' fears about teenagers?

She explained that teenagers face many difficulties and fears.

What concern did another woman express about her daughter?

She was confused that her daughter stayed home reading instead of making memories.

How did Mary Brown respond to the woman concerned about her daughter?

She explained that teenagers are different from one another.

What general confusion existed about teenagers in the 1950s?

People were unsure how teenagers should behave and be treated.

What other concern existed about teenagers in the 1950s?

That they were growing up too quickly.

How did 15-year-old boys and girls view themselves in the 1960s?

They considered themselves adults.

How did parents need to change their relationship with teenagers in the 1960s?

They needed to interact with them more like adults.

What did Tatler criticise about teenage girls in the 1960s?

Their appearance and hairstyles.

What positive aspect of teenage culture did Tatler acknowledge?

Young people's joy in trying new things.

What was the overall impact of teenagers on UK culture?

Teenagers had a major influence on British culture.

What is the prefrontal cortex responsible for?

Processing and adapting thinking to achieve goals in different situations.

What cognitive abilities are controlled by the prefrontal cortex?

Speech formation, gaze control, working memory, and risk processing.

What type of thinking does the prefrontal cortex support?

Higher-order cognitive tasks.

What ability allows people to weigh consequences and social acceptability?

The prefrontal cortex.

What happened to Phineas Gage's prefrontal cortex?

It was damaged by an iron rod accident.

What effect did damage to Phineas Gage's prefrontal cortex have?

It caused major personality changes.

What did experiments on people with damaged prefrontal cortices show?

They knew appropriate social responses but chose immediate gratification.

Why is the prefrontal cortex important for adolescent development?

It is connected to emotional and social brain systems.

Why are humans considered intelligent compared to other animals?

They have the largest prefrontal cortex relative to other animals.

When does the prefrontal cortex fully mature?

By adulthood.

Which brain system develops earlier than the prefrontal cortex?

The limbic system.

What does the limbic system control?

Emotions and motivation.

Why are teenagers more likely to take risks?

Their emotional systems are developed before their decision-making systems fully mature.

When is the brain most neuroplastic?

During adolescence.

Why is adolescence a good time for challenging activities?

The brain is highly capable of adapting and learning.

What is neural pruning?

The process of removing unnecessary connections between neurons.

What is another name for neural pruning?

Synaptic pruning.

What is the purpose of neural pruning?

To make brain connections more efficient.

What principle explains neural pruning?

"Use it or lose it."

When does neural pruning happen most strongly?

From birth until early puberty.

Does neural pruning stop after puberty?

No, it continues throughout adolescence.

Can neural pruning affect different brain areas differently?

Yes, some areas lose many connections while others lose few.

What type of memories are formed through hippocampus and amygdala connections?

Emotional memories.

How do emotional memories influence behaviour?

They reinforce certain behaviours.