Michael Merzenich: Growing evidence of brain plasticity

TL;DR

The human brain is born with limited abilities but has the capacity to change and develop through plasticity, allowing for the acquisition of skills and abilities throughout life.

Transcript

This machine, which we all have residing in our skulls, reminds me of an aphorism, of a comment of Woody Allen to ask about what is the very best thing to have within your skull. And it's this machine. And it's constructed for change. It's all about change. It confers on us the ability to do things tomorrow that we can't do today, things today that... Read More

Key Insights

• 🧠 Our brains are built for change and growth, allowing us to constantly learn and develop new skills from infancy to adulthood.
• 👶 Infants are born with limited abilities and perception, but as they grow, their brains advance quickly, storing information and developing cognitive skills.
• ⚽ Environmental factors play a crucial role in shaping an individual's skills and abilities, as seen in the example of soccer ball bouncing ability being more prevalent in a certain region.
• 🔁 Plasticity, the brain's ability to change and adapt, is present throughout life and allows for the refinement of skills and abilities through focused attention and goal achievement.
• 🔬 Scientists study brain plasticity by training animals and observing changes in their brain maps and responses, revealing the physical changes that occur during skill acquisition.
• 🤝 Human brains are impacted by social interactions and experiences that shape individual identities, resulting in unique sets of skills and abilities.
• 🔊 Language development and reading skills can be improved through targeted brain plasticity interventions, benefiting children with learning impairments and older individuals experiencing cognitive decline.
• ♂️ Maintaining a well-ordered life with continuous learning and engagement in brain aerobics can promote brain health and function throughout life.

Questions & Answers

Q: How does the brain change and develop from infancy to adulthood?

The brain undergoes a remarkable evolution from being born with limited abilities to acquiring refined perceptual abilities, cognitive skills, and advanced control over movement. Infants start with limited control over their movements but steadily progress to crawling, standing, walking, and eventually developing the ability to perform complex movements like playing soccer.

Q: How does the environment shape an individual's skills and abilities?

An individual's skills and abilities are shaped by their environment. The brain's plasticity allows it to adapt and develop specific skills and abilities based on individual experiences and exposures. For example, growing up in Sao Paulo, Brazil, where soccer is popular, increases the likelihood of acquiring advanced soccer skills compared to growing up in an environment where soccer is not as prevalent.

Q: What is the critical period of brain plasticity?

The critical period refers to the early stage of brain development where the brain sets up its basic processing machinery. During this period, exposure to certain stimuli, such as language or sound, plays a crucial role in shaping the brain's processing capabilities. The critical period is characterized by significant changes in the brain without the need for explicit learning.

Q: How does brain plasticity contribute to learning impairments?

Brain plasticity can be affected by inherited faults or environmental factors, leading to learning impairments. For example, children with language impairments often have a defective language processor due to noisy brain processing. However, targeted brain plasticity-based approaches, such as intensive training, can re-refine the brain's processing capacity and improve language skills in such individuals.

Q: How can brain plasticity be utilized in old age to improve cognitive function?

In older adults, brain plasticity can be harnessed to improve cognitive function and memory through targeted training. Intensive training for about 30 hours has shown substantial improvements in immediate memory, attention control, language abilities, and visual-spatial abilities in 80- to 90-year-olds. This highlights the potential for using brain aerobics to maintain high-functioning learning machines in older age.

Summary & Key Takeaways

• The human brain is born with limited abilities, but it has the remarkable capacity to change and develop.

• As infants grow, their brains go through a steady progression of development, acquiring perceptual abilities, cognitive skills, and control over movement.

• Plasticity in the brain allows for the specialization and refinement of skills and abilities, resulting in the unique individual differences we see in humankind.