シャドーイング練習: The Nervous System In 9 Minutes - YouTubeで英語スピーキングを学ぶ
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The Great and Mighty Nervous System Or the brain as most of us call it.
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The Great and Mighty Nervous System Or the brain as most of us call it.
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What makes this organ unique is that within it lies the ability for humans to know oneself.
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This feature distinguishes and sets the human species apart from the rest of creation.
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This ability is known as consciousness or intelligence.
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To begin, let's look at the primary function of the nervous system.
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The basic purpose is to coordinate all of the activities of the body.
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It enables the body to respond and adapt to changes that occur both inside and outside the body.
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Now the nervous system is actually split into two parts.
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The central nervous system and the peripheral nervous system.
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We'll explore the peripheral later,
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but first, let's look at the central nervous system.
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The central nervous system is made up of two major structures,
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the brain and the spinal cord.
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As most people know, the brain is found within the cranium or skull.
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And there are six main sections among other structures within it.
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These six sections are the cerebrum,
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cerebellum, diencephalon, the midbrain, pons, and the medulla oblongata.
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The first section is the cerebrum.
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This is the largest section.
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It's divided into two major hemispheres,
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which are the right and left hemisphere.
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And the cerebrum is further divided into four lobes.
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These four lobes are the frontal,
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the parietal, the temporal, and the occipital.
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The frontal lobe is primarily responsible for reasoning and thought.
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The parietal is primarily responsible for integrating sensory information.
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The temporal is primarily responsible for processing auditory information from the ears.
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and the occipital is primarily responsible for processing visual information from the eyes.
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The second section of the brain is the cerebellum.
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This is the section located in the back of the head,
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below the cerebrum and above the first cervical of the neck.
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It is responsible for muscle coordination,
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balance, posture and muscle tone.
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The diencephalon section is found between the cerebrum and the midbrain.
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It contains two structures, the thalamus and the hypothalamus.
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The thalamus behaves much like a relay station and directs sensory impulses to the cerebrum.
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And the hypothalamus controls and regulates autonomic nervous system functions such as temperature,
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appetite, water balance, sleep, and blood vessel constriction and dilation.
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The hypothalamus also plays a role in the emotions such as anger,
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fear, pleasure, pain, and defection.
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The midbrain section is located below the cerebrum at the top of the brain stem.
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It is responsible for certain eye and auditory reflexes.
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The pons is located below the midbrain and in the brain stem.
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It is responsible for certain reflex actions such as chewing,
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tasting, and saliva production.
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And the last section is the medulla oblongata.
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It's the lowest part of the brain stem
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and it connects with the spinal cord and is responsible for regulating heart and blood vessel function,
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digestion, respiration, swallowing, coughing, sneezing and blood pressure.
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It's also known as the center for respiration.
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Now that we've covered the brain,
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let's take a look at the other half of the central nervous system, the spinal cord.
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The spinal cord is the link between the brain and the nerves in the rest of the body.
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The spinal cord is divided into four different regions,
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the cervical, thoracic, lumbar, and the afferent and efferent spinal nerves,
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which merge to form the peripheral nerves.
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The afferent spinal nerves are responsible for carrying information from the body to the brain.
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And the efferent spinal nerves are responsible for carrying information from the brain to the body.
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Now within this elaborate system of nerves,
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neurons and dendrites, there is a system
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that regulates the functions of the central nervous system
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which lie outside its major components such as the brain and the spinal cord.
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This system is known as the peripheral nervous system and is subdivided into two smaller systems,
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the somatic system and the autonomic nervous system.
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The somatic nervous system is responsible for carrying motor and sensory information both to and from the central nervous system.
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This system is made up of nerves that connect to the skin,
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sensory organs, and all skeletal muscles.
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The somatic system is also responsible for nearly all voluntary muscle movements as well as for processing sensory information
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that arrives via external stimuli including hearing, touch, and sight.
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The structures that allow this communication to happen between the nerves throughout the body
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and the central nervous system are known as the afferent sensory neurons and the efferent motor neurons.
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Afferent simply means conducting inward and efferent means conducting outward.
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So just like in the spinal nerves,
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the afferent neurons take information from the nerves to the central nervous system
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and the efferent neurons take information from the central nervous system to the muscle fibers throughout the body.
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The Autonomic Nervous System is further divided into the Sympathetic Nervous System and the Parasympathetic Nervous System.
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The Sympathetic Nervous System is vital to our survival.
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Have you ever heard of the fight or flight response to danger?
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The Sympathetic Nervous System revs up the body when confronted with imminent danger to either defend yourself or to escape the threat.
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The parasympathetic nervous system is the counterbalance to the sympathetic response to danger,
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whether real or imagined.
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Once the threat is gone,
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the parasympathetic brings all the systems of the body back to normal.
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Now at this point you should have a basic understanding of the nervous system,
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but let's do a quick recap.
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The basic purpose of the nervous system is to coordinate all the activities of the body.
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It enables the body to respond and adapt to changes that occur both inside and outside the body.
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The two major parts to the nervous system are the central nervous system and the peripheral nervous system.
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The central nervous system is also divided into two major structures,
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the brain and the spinal cord.
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The brain is found within the skull or cranium and it is made up of six main sections.
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These six sections are the cerebrum,
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cerebellum, diencephalon, the midbrain, pons and the medulla oblongata.
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The other half of the central nervous system is the spinal cord
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and the spinal cord is the link between the brain and the nerves and the rest of your body.
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The spinal cord is divided into four different regions.
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The cervical, thoracic, lumbar, and afferent and efferent spinal nerves which merge to form the peripheral nerves.
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Now that we know the brain and spinal cord primarily make up the central nervous system,
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let's look at the peripheral nervous system.
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The peripheral nervous system is essentially the nervous system outside of the brain and spinal cord.
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The peripheral nervous system is then subdivided into two smaller systems called the somatic nervous system and the autonomic nervous system.
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So as you can see,
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the nervous system is quite complex and this is just the tip of the iceberg.
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Thanks for watching.
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Look for more videos on the nervous system at cteskills.com.
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なぜこのビデオで話す練習をするのか？
この「神経系を9分で理解する」というビデオは、英語力を向上させる絶好の機会です。特に、専門的な話題を扱っているため、専門用語や文脈における表現を学ぶことができます。英語シャドーイングを通じて、リスニング力を強化し、実際の会話で使えるフレーズを習得することができます。動画の内容を真似ることで、自然な発音やリズムを身に付けることができ、IELTS スピーキング対策にも役立ちます。さらに、自分の声で話してみることで、記憶に定着しやすくなり、表現力が豊かになります。
文法と表現の文脈
このビデオには、いくつかの重要な文法構造や表現が含まれています。以下にそのいくつかを分析します。
- 主語と述語の一致: 「The central nervous system is made up of...」のように、主語と動詞が正しく一致することで、文の明確さが保たれています。
- 受動態の使用: 「The thalamus behaves much like a relay station.」の例が示すように、受動態は説明や定義を行う際に非常に役立ちます。
- 前置詞の正しい使用: 「located between the cerebrum and the midbrain」のように、前置詞を正しく使用することで、位置関係が明確になります。
- 並列構造: 「responsible for...」というフレーズが繰り返され、各部分の役割が簡潔に説明されている点も、効果的です。
一般的な発音の落とし穴
このビデオには、発音の際に注意が必要な単語やアクセントがあります。以下はそのいくつかです。
- cerebrum: 「セレブラム」と発音しますが、濁音に気を付けて発音しましょう。
- diencephalon: 難しい単語であるため、発音をゆっくりと練習し、音節に分けて覚えることが重要です。
- medulla oblongata: 英語の発音では「メデュラ オブロンガータ」となります。特に「oblongata」の部分は注意が必要です。
これらのポイントに注意することで、YouTubeで英語学習を行いながら、より効果的な英語スピーキング力を養うことができます。
シャドーイングとは？英語上達に効果的な理由
シャドーイング（Shadowing）は、もともとプロの通訳者養成プログラムで開発された言語学習法で、多言語習得者として知られるDr. Alexander Arguelles によって広く普及されました。方法はシンプルですが非常に効果的：ネイティブスピーカーの英語を聞きながら、1〜2秒の遅延で声に出してすぐに繰り返す——まるで「影（shadow）」のように話者を追いかけます。文法ドリルや受動的なリスニングと異なり、シャドーイングは脳と口の筋肉が同時にリアルタイムで英語を処理・再現することを強制します。研究により、発音精度、抑揚、リズム、連音、リスニング力、そして会話の流暢さが大幅に向上することが確認されています。IELTSスピーキング対策や自然な英語コミュニケーションを目指す方に特におすすめです。