Pratica di Shadowing: What happens when you remove the hippocampus? - Sam Kean - Impara a parlare inglese con YouTube

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On September 1, 1953, William Scoville used a hand crank and a cheap drill saw to bore into a young man's skull,
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cutting away vital pieces of his brain and sucking them out through a metal tube.
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But this wasn't a scene from a horror film or a gruesome police report.
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Dr. Scoville was one of the most renowned neurosurgeons of his time,
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The young man was Henry Malayason,
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the famous patient known as H.M.,
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whose case provided amazing insights into how our brains work.
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As a boy, Henry had cracked his skull in an accident and soon began having seizures,
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blacking out, and losing control of bodily functions.
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After enduring years of frequent episodes and even dropping out of high school,
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the desperate young man had turned to Dr. Scoville,
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a daredevil known for risky surgeries.
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Partial lobotomies had been used for decades to treat mental patients,
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based on the notion that mental functions were strictly localized to corresponding brain areas.
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Having successfully used them to reduce seizures in psychotics,
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Scoville decided to remove H.M.'s hippocampus,
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a part of the limbic system that was associated with emotion,
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but whose function was unknown.
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At first glance, the operation had succeeded.
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H.M.'s seizures virtually disappeared, with no change in personality,
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and his IQ even improved.
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But there was one problem.
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His memory was shot.
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Besides losing most of his memories from the previous decade, H.M was unable to form new ones,
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forgetting what day it was,
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repeating comments, and even eating multiple meals in a row.
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When Scoville informed another expert,
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Wilder Penfield, of the results,
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he sent a PhD student named Brenda Milner to study HM at his parents' home,
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where he now spent his days doing odd chores and watching classic movies for the first time,
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over and over.
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What she discovered through a series of tests and interviews didn't just contribute greatly to the study of memory.
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It redefined what memory even meant.
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One of Milner's findings shed light on the obvious fact that although H.M couldn't form new memories,
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he still retained information long enough from moment to moment to finish a sentence or find the bathroom.
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When Milner gave him a random number,
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he managed to remember it for 15 minutes by repeating it to himself constantly.
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But only five minutes later,
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he forgot the test had even taken place.
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Neuroscientists had thought of memory as monolithic,
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all of it essentially the same,
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and stored throughout the brain.
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Milner's results were not only the first clue for the now familiar distinction between short-term and long-term memory,
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but showed that each uses different brain regions.
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We now know that memory formation involves several steps.
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After immediate sensory data is temporarily transcribed by neurons in the cortex,
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it travels to the hippocampus,
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where special proteins work to strengthen the cortical-synaptic connections.
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If the experience was strong enough,
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or we recall it periodically in the first few days,
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the hippocampus then transfers the memory back to the cortex for permanent storage.
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HM's mind could form the initial impressions,
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but without a hippocampus to perform this memory consolidation,
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they eroded like messages scrawled in sand.
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But this was not the only memory distinction Milner found.
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In a now-famous experiment,
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she asked H.M to trace a third star in the narrow space between the outlines of two concentric ones,
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while he could only see his paper and pencil through a mirror.
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Like anyone else performing such an awkward task for the first time, he did horribly.
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But surprisingly, he improved over repeated trials,
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even though he had no memory of previous attempts.
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His unconscious motor centers remembered remembered what the conscious mind had forgotten.
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What Milner had discovered was that the declarative memory of names,
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dates, and facts is different from the procedural memory of riding a bicycle or signing your name.
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And we now know that procedural memory relies more on the basal ganglia and cerebellum,
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structures that were intact in H.M.'s brain.
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This distinction between knowing that and knowing how has underpinned all memory research since.
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H.M died at the age of 82 after a mostly peaceful life in a nursing home.
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Over the years, he had been examined by more than 100 neuroscientists,
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making his the most studied mind in history.
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Upon his death, his brain was preserved and scanned before being cut into over 2,000 individual slices
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and photographed to form a digital map down to the level of individual neurons,
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all in a live broadcast watched by 400,000 people.
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Though H.M spent most of his life forgetting things,
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he and his contributions to our understanding of memory will be remembered for generations to come.
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Thank you.

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Perché praticare il parlato con questo video?

Praticare il parlato con il video "Cosa succede quando rimuovi l'ippocampo?" offre un contesto unico e affascinante per migliorare la tua fluency in inglese. La narrazione di eventi storici reali, come la storia di H.M. e degli esperimenti condotti da Brenda Milner, non solo stimola l'interesse ma fornisce anche un'ottima opportunità per utilizzare il shadow speech. Questo metodo ti consente di seguire e ripetere le frasi del relatore, migliorando la tua pronuncia inglese e la tua capacità di conversazione. Rimanere concentrati sui dettagli e sulle emozioni raccontate nel video ti aiuta a esprimere le tue idee in modo più naturale e coinvolgente.

Grammatica ed Espressioni nel Contesto

Durante il video, ci sono diverse strutture linguistiche e espressioni chiave che meritano attenzione:

  • "What happens when you remove the hippocampus?" - Questa struttura interrogativa simile all'italiano conferma come porre domande in inglese possa aiutare a stimolare la conversazione.
  • "H.M. was unable to form new ones" - L'uso del passato semplice per descrivere fatti storici sarà utile nella tua pratica di conversazione in inglese.
  • "He managed to remember it for fifteen minutes" - La forma perfetta del verbo "to manage" offre spunti su come esprimere il conseguimento di un'azione.
  • "Each uses different brain regions" - Qui vediamo l'uso di "each" e "different" in un contesto comparativo, un concetto fondamentale nella grammatica inglese.

Trappole Comuni di Pronuncia

Molti studenti affrontano difficoltà nella pronuncia di alcune parole e frasi. Ecco alcuni esempi tratti dal video:

  • "Hippocampus" - Attenzione alla pronuncia di questa parola, che può risultare complicata. Fai pratica con il suono "hippo" e "campus" accostati.
  • "Neurosurgeon" - Questa parola ha una pronuncia unica: la "neuro" diventa quasi "nuro". Esercitati a ripeterla per migliorare la tua fluidità.
  • "Seizures" - Presta attenzione al suono "ze", che può confondere. Puoi usare la tecnica dello shadowing in inglese per perfezionare questa pronuncia.

Utilizzando queste informazioni durante la pratica di conversazione in inglese, riuscirai a migliorare la tua comprensione e il tuo modo di esprimerti, affinando la tua pronuncia inglese e aumentando la tua sicurezza nella lingua.

Cos'è la tecnica dello Shadowing?

Shadowing è una tecnica di apprendimento delle lingue supportata da studi scientifici, originariamente sviluppata per la formazione dei traduttori professionisti e resa popolare dal poliglotta Dr. Alexander Arguelles. Il metodo è semplice ma potente: ascolti un audio in inglese di madrelingua e lo ripeti immediatamente ad alta voce — come un'ombra che segue il parlante con un ritardo di solo 1–2 secondi. A differenza dell'ascolto passivo o degli esercizi di grammatica, lo shadowing costringe il tuo cervello e i muscoli della bocca a elaborare e riprodurre simultaneamente i modelli di discorso reale. La ricerca dimostra che migliora significativamente la precisione della pronuncia, l'intonazione, il ritmo, il discorso connesso, la comprensione dell'ascolto e la fluidità del parlato — rendendolo uno dei metodi più efficaci per la preparazione alla prova di speaking dell'IELTS e per la comunicazione reale in inglese.

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