Pratique du Shadowing: How stress affects your brain - Madhumita Murgia - Apprendre l'anglais à l'oral avec YouTube

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Are you sleeping restlessly, feeling irritable or moody, forgetting little things, and feeling overwhelmed and isolated?
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Are you sleeping restlessly, feeling irritable or moody, forgetting little things, and feeling overwhelmed and isolated?
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Don't worry. We've all been there.
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You're probably just stressed out.
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Stress isn't always a bad thing.
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It can be handy for a burst of extra energy and focus, like when you're playing a competitive sport, or have to speak in public.
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But when its continuous, the kind most of us face day in and day out, it actually begins to change your brain.
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Chronic stress, like being overworked or having arguments at home, can affect brain size, its structure, and how it functions, right down to the level of your genes.
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Stress begins with something called the hypothalamus pituitary adrenal axis, a series of interactions between endocrine glands in the brain and on the kidney, which controls your body's reaction to stress.
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When your brain detects a stressful situation, your HPA axis is instantly activated and releases a hormone called cortisol, which primes your body for instant action.
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But high levels of cortisol over long periods of time wreak havoc on your brain.
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For example, chronic stress increases the activity level and number of neural connections in the amygdala, your brain's fear center.
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And as levels of cortisol rise, electric signals in your hippocampus, the part of the brain associated with learning, memories, and stress control, deteriorate.
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The hippocampus also inhibits the activity of the HPA axis, so when it weakens, so does your ability to control your stress.
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That's not all, though.
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Cortisol can literally cause your brain to shrink in size.
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Too much of it results in the loss of synaptic connections between neurons and the shrinking of your prefrontal cortex, the part of your brain the regulates behaviors like concentration, decision-making, judgement, and social interaction.
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It also leads to fewer new brain cells being made in the hippocampus.
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This means chronic stress might make it harder for you to learn and remember things, and also set the stage for more serious mental problems, like depression and eventually Alzheimer's disease.
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The effects of stress may filter right down to your brain's DNA.
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An experiment showed that the amount of nurturing a mother rat provides its newborn baby plays a part in determining how that baby responds to stress later in life.
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The pups of nurturing moms turned out less sensitive to stress because their brains developed more cortisol receptors, which stick to cortisol and dampen the stress response.
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The pups of negligent moms had the opposite outcome, and so became more sensitive to stress throughout life.
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These are considered epigenetic changes, meaning that they effect which genes are expressed without directly changing the genetic code.
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And these changes can be reversed if the moms are swapped.
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But there's a surprising result.
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The epigenetic changes caused by one single mother rat were passed down to many generations of rats after her.
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In other words, the results of these actions were inheritable.
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It's not all bad news, though.
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There are many ways to reverse what cortisol does to your stressed brain.
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The most powerful weapons are exercise and meditation, which involves breathing deeply and being aware and focused on your surroundings.
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Both of these activities decrease your stress and increase the size of the hippocampus, thereby improving your memory.
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So don't feel defeated by the pressures of daily life.
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Get in control of your stress before it takes control of you.

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About This Lesson

In this insightful video, "How stress affects your brain" by Madhumita Murgia, you'll gain a deeper understanding of the profound impact chronic stress has on your brain's structure and function. The speaker delves into complex biological processes, explaining how the hypothalamus-pituitary-adrenal (HPA) axis and cortisol hormone responses can literally change parts of your brain like the amygdala, hippocampus, and prefrontal cortex. You'll learn how stress can impair your ability to learn, remember, concentrate, and make decisions, and even set the stage for more serious mental health issues. Importantly, the lesson also provides empowering information on how to reverse these effects through simple yet powerful methods like exercise and meditation.

This video is an excellent resource for targeted English speaking practice. You'll practice:

  • Vocabulary topics: Scientific and medical terms related to the brain and psychology (e.g., irritable, overwhelmed, chronic stress, amygdala, hippocampus, prefrontal cortex, cortisol, epigenetic changes).
  • Grammar patterns: Explaining cause-and-effect relationships, describing complex biological processes, and presenting research findings.
  • Speaking contexts: Articulating scientific information clearly, summarizing complex ideas, and offering advice or solutions in a formal, informative tone. This is particularly valuable for those preparing for academic discussions or presentations.

Key Vocabulary & Phrases

  • Sleeping restlessly: Experiencing disturbed or poor-quality sleep; not sleeping deeply or peacefully. (e.g., "Are you sleeping restlessly?")
  • Feeling irritable or moody: Easily annoyed, frustrated, or having frequent changes in temper and emotional state. (e.g., "Feeling irritable or moody can be a sign of stress.")
  • Feeling overwhelmed and isolated: Feeling like you have too much to handle and are cut off or disconnected from others. (e.g., "Many people end up feeling overwhelmed and isolated when under constant pressure.")
  • Wreak havoc on: To cause great damage, disruption, or chaos to something. (e.g., "High levels of cortisol over long periods of time can wreak havoc on your brain.")
  • Deteriorate: To become progressively worse in quality or condition over time. (e.g., "Electric signals in your hippocampus deteriorate under chronic stress.")
  • Set the stage for: To create the necessary conditions or circumstances for something, often something negative, to happen. (e.g., "Chronic stress can set the stage for more serious mental problems.")
  • Dampen the stress response: To reduce, lessen, or weaken the body's reaction to stressful situations. (e.g., "Cortisol receptors help to dampen the stress response.")
  • Feel defeated by: To feel overcome, disheartened, or discouraged by a challenge or pressure. (e.g., "Don't feel defeated by the pressures of daily life.")

Practice Tips for This Video

This video offers an excellent opportunity to refine your English fluency and communication skills, especially for academic or scientific contexts. When practicing with this video, consider the following specific tips:

  • Focus on Scientific Terminology: The transcript is rich with complex biological terms like hypothalamus pituitary adrenal axis, amygdala, hippocampus, prefrontal cortex, and epigenetic changes. Dedicate specific time to pronunciation practice for these words. Break them down into syllables and practice saying them slowly and clearly before speeding up.
  • Master the Shadowing Technique: The speaker maintains a clear, moderate pace, making it ideal for the shadowing technique. Try to mirror not just the words, but also the speaker's intonation, rhythm, and stress patterns, especially when explaining cause-and-effect relationships or presenting scientific findings. This will significantly improve your natural spoken English.
  • Explain Complex Concepts: After shadowing sections, pause and try to explain the scientific concepts discussed in your own words. This is a fantastic exercise for developing your ability to paraphrase and simplify complex information, a crucial skill for IELTS speaking tasks, particularly Part 3.
  • Adopt an Informative Tone: Pay attention to how the speaker conveys information in an authoritative yet accessible manner. Practice adopting a similar informative tone, focusing on clarity and logical flow, which is beneficial for presentations and academic discussions.
  • Active Listening for Details: The video contains detailed explanations of processes. Practice active listening to grasp these specifics, then try to recall and articulate them without looking at the transcript. This boosts both your comprehension and recall abilities for complex English content.

By applying these targeted strategies, you'll not only enhance your understanding of stress but also make significant strides in your advanced English speaking practice.

Qu'est-ce que la technique du Shadowing ?

Le Shadowing est une technique d'apprentissage des langues fondée sur la science, développée à l'origine pour la formation des interprètes professionnels. Le principe est simple mais puissant : vous écoutez de l'anglais natif et le répétez immédiatement à voix haute — comme une ombre suivant le locuteur avec un décalage de 1 à 2 secondes. Les recherches montrent une amélioration significative de la précision de la prononciation, de l'intonation, du rythme, des liaisons, de la compréhension orale et de la fluidité.

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