シャドーイング練習: Abdominal Muscles & Inguinal Canal - Dissection Supplement - 動画で英語スピーキングを学ぶ

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Hello anatomy friends this is Dr. Alsup

and in this supplementary dissection video we will be discussing some of the muscles particularly associated with the abdominal wall,

certain structures associated with the inguinal canal, and anything in that surrounding area.

The inguinal canal is a traditionally difficult area in dissection

so we will take our time in this region to discuss some of those basics that you need to know.

But let's start with the abdominal wall first specifically the most superficial of the anterolateral abdominal wall muscles

which are the external obliques.

The muscle fibers of the external obliques run in a similar direction as those of the external intercostal muscles between the ribs.

I always think of kind of putting your hands in your

front pockets in terms of the directionality of the muscle fibers for the external oblique. And

if you're looking at a superficial dissection you are looking at the external oblique

you would have to reflect the external oblique to see the deeper internal oblique and transversus abdominis.

And as we aren't asking you to identify those

you should be in pretty good shape there in terms of being able to identify this muscle.

I also really like this image as it shows how the

tendons of the oblique muscles really form the rectus sheath

which is this whole area right here on this particular individual the rectus sheath is quite robust.

And they're essentially continuous because it is the tendons

or the flattened tendons called the aponeuroses of the oblique muscles and transversus abdominis that form the rectus sheath.

The sheath is pretty hard to miss.

It is the dominant white and kind of variably opaque structure in the anterior portion of the abdominal wall.

You can see through it a little bit in terms of seeing some of the muscle fibers

but for the most part it's fairly opaque.

And running down the midline, you have umbilicus here so you know that you're in the midline,

is going to be the linea alba which means white line.

And it's notably more opaque than the rest of the rectus sheath

and it's the medial most attachment point of those three anterior lateral abdominal muscles on both sides.

Now let's see what we can see when we reflect a portion of the rectus sheath which has been done here.

In fact in order to view the rectus abdominis muscle you have to reflect the anterior portion of the rectus sheath,

which is what's happened in this image on the left side

the anterior rectus sheath has been left in place on the right side.

So you can really only see the left rectus abdominis.

You can see how long the rectus abdominis is.

It extends from the xiphoid process up here all the way down towards the pubic symphysis, so a very long muscle.

And you can see the tendinous intersections that are going to be interspersed throughout the muscle here.

On this particular individual there are three on this side which is the most typical pattern.

Now I put this second image over here with the rectus abdominis reflected inferiorly in order to point out

that there is a posterior portion of the rectus sheath which you can see right in this region.

Remember that the rectus sheath is going to envelop the rectus abdominis. But it's not complete.

It actually ends about three -fourths of the way down, and what you're left with in this inferior most portion is just transversalis fascia,

which typically appears a little more transparent than the posterior rectus sheath, and this line of demarcation is called the arcuate line.

All right let's move to the inguinal canal region, and as I mentioned at the beginning this is a traditionally complex region

and there are a lot of structures that we're not going to have you identify.

We're really only picking up on the structures that are on the easier side to identify the more prominent structures.

Now the inguinal canal extends from the deep inguinal ring, which as the name would suggest is deep and not visible from these more superficial dissections,

and the superficial inguinal ring which has been opened on this dissection it would be right about here,

but it is visible on this dissection so right here

kind of where you have that opening is going to be the superficial inguinal ring.

This is the exit or medial aperture of the inguinal canal and is formed by the external oblique aponeurosis,

and you can typically see structures exiting the canal.

And you can see that in both of these images.

We will start with this one where you can see the

round ligament of the uterus exiting the where the superficial ring would be located.

And the round ligament is sometimes difficult to identify as it presents as a tubular collection of adipose tissue,

which may be difficult to differentiate from some of the surrounding adipose tissue.

But one thing that you can see a little bit of here is that there, and I drew already kind of a line through it,

is going to be a nerve called the ilioinguinal nerve which will run superficial to the round ligament.

Sometimes that helps with identification, sometimes not so much it's a rather small nerve, but when you when you do see a collection of fat

or adipose tissue with a nerve running right on top of it you're likely looking at that round ligament.

The round ligament of the uterus connects the uterus to the labia magus,

although in some individuals it does not extend all the way to the labia magus into adulthood

and it's a remnant of the gubernaculum.

On this individual you can see their spermatic cord exiting the superficial inguinal ring with that ilioinguinal superficial to it.

And you can see on this side the spermatic cord has

been dissected to show you the different components of the cord

and we will discuss both the round ligament of the uterus

and the spermatic cord in more detail in the reproductive anatomy session.

Now one last thing I want to discuss here is the inguinal ligament

and you can't see it well here as recall

that the inguinal ligament is the floor of the inguinal canal

and we can still see these more superficial structures of the inguinal canal so it's occluding the view of the inguinal ligament.

But we can conceptualize where it would be located as it extends from the anterior superior iliac spine

to about the level of the pubic tubercle around this region.

and that is going to

to give you an indication that that inguinal ligament is longer than the inguinal canal as it doesn't actually begin,

the inguinal canal doesn't actually begin until the deep inguinal ring which is a little bit more right around this region.

So that inguinal ligament is going to be made up of external oblique apneurosis

and so it's going to be very similar in terms of composition as what we see right around this region.

Okay moving to the deep surface of the anterior abdominal wall here

and you can see peritoneal cavity over here

you can see some of the the omenta right here a little bit of viscera.

This all looks a bit a little bit overwhelming I get

that but there's a lot going on but let's take these things one at a time.

So here this individual is actually holding the anterior abdominal wall that's been reflected

and I can see kind of right off the bat one

of the most prominent things is I see the inferior epigastric vessels.

So you can see the two paired veins

and the artery right in between and much of the peritoneum has been removed here

so this is less the lateral umbilical fold than just the vasculature.

Now just lateral to this you can see right around this region a collection

or what looks like a tubular collection of adipose tissue is entering into this region here.

All right and that's exactly what is happening.

This is that round ligament of the uterus entering into the deep inguinal ring. And so

that area where you have the invagination of the transversalis fascia is the deep inguinal ring the entrance

or internal aperture of the inguinal canal.

Now the round ligament tends to be a bit more robust around the deep inguinal ring than at the superficial inguinal ring,

but there is noted variation there.

Now important to note here in this image the inferior epigastric

vasculature is going to be medial to the deep inguinal ring

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and that relationship is something that comes up often particularly in discussions of inguinal hernias.

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And lastly here is the trusty diaphragm so this is going to be the left.

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hemidiaphragm and this over here will be the right hemidiaphragm.

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And we discussed the diaphragm in the previous block

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but it's just as important here as a major subdivision between the thoracic and abdominal cavity.

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You can see the liver right underneath here with

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that very close relationship

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and the stomach is just going to be deep to um oops

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I had these mixed up this should be the left and this should be the right.

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Always patient left and patient right see that gets us sometimes even though we think about these things quite often.

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So that makes sense because the liver should be on the right.

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So right underneath the right hemidiaphragm will be the liver

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and right underneath the left hemidiaphragm which you can't see very clearly

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because it's not poking out underneath here will be the stomach.

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Apologies for that but you can see kind of on the fly how we can get those things confused.

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Now recall that the diaphragm has three openings that allow structures to traverse the region.

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Recall the esophagus is going to traverse the region, you will have also the vagal trunks will be closely related to that.

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You'll have the inferior vena cava that will ascend through this region to get to the right atrium, and of course you'll have the aorta

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which is also going to traverse the diaphragm in order to get to the abdominal cavity region.

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Okay that should wrap us up regarding the musculature in this session and the inguinal canal structures and contents.

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Please take your time to review and reach out if you have any questions.

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I hope you have a great rest of your day.

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このレッスンの語彙とスピーキングのポイント

このスピーキングレッスンは、動画「Abdominal Muscles & Inguinal Canal - Dissection Supplement」を教材にしています。繰り返し出てくる語は次のとおりです：inguinal, rectus, ligament, muscle, region。この動画には、シャドーイング用の文が121文、単語が1760語あります。音声の長さは11:39です。話す速さは1分あたり約151語で、日常会話に近い自然なペースです。英語の頻出3,000語に含まれる単語は77%だけなので、語彙は難しめです。

この動画の重要語彙

動画に出てくる覚えておきたい単語15語を、発音と意味つきで紹介します。

単語	発音	意味
muscle 名詞	/ˈmʌs.əl/	筋肉, 筋
canal 名詞	/kəˈnæl/	運河, 水路
reflect 動詞	/ɹɪˈflɛkt/	跳ね返す, 反射する
exit 名詞	/ˈɛɡzət/	出口
tissue 名詞	/ˈtɪʃ.(j)u/	織物
nerve 名詞	/nɝv/	神経
cord 名詞	/ˈkoɹd/	縄
inferior 形容詞	/ɪnˈfɪɹ.i.ɚ/	劣る, 賎しい
recall 動詞	/ɹɪˈkɔl/	呼び返す
lateral 形容詞	/ˈlætəɹəl/	横
cavity 名詞	/ˈkæv.ɪt.i/	腔
stomach 名詞	/ˈstʌmək/	胃, 胃袋
associate 名詞	/əˈsoʊʃi.ət/	提携者
visible 形容詞	/ˈvɪzɪb(ə)l/	見える, 目に見える
prominent 形容詞	/ˈpɹɑmɪnənt/	著しい

動画に出てくる句動詞

単語	意味
come up 動詞	上がる, 登る
point out 動詞	指す, 指し示す
see through 動詞	見通す, 透視する

この動画の文法

話し手がよく使っている文型を、動画の実際の表現とともに紹介します。

文型	動画での表現
受動態 be + 過去分詞 — 誰がするかより、何が起きるかに焦点を当てる	has been done · has been left · be interspersed
関係詞節 who / which + 節 — 人や物について情報を加える	alba which means · sheath which has · side which is
現在完了形 have/has + 過去分詞 — 過去の出来事が今も関係している	has been done · has been left · has been opened

注意したい発音

話し手はyou're, can't, doesn'tなど、短縮形や弱形を14回使っています。聞こえたとおりの短い形で発音しましょう。

「th」の音: underneath /ˌʌndɚˈniθ/, sheath /ʃiθ/, thoracic /θəˈɹæsɪk/
「sh」と「zh」の音: superficial /ˌsupɚˈfɪʃəl/, tissue /ˈtɪʃ.(j)u/, associate /əˈsoʊʃi.ət/, traditionally /tɹəˈdɪʃ.ə.nə.li/, essentially /ɪˈsɛnʃəli/
長い単語（アクセントの位置に注意）: superficial /ˌsupɚˈfɪʃəl/, anterior /ænˈtɪɹ.i.ɚ/, inferior /ɪnˈfɪɹ.i.ɚ/, associate /əˈsoʊʃi.ət/, traditionally /tɹəˈdɪʃ.ə.nə.li/

日本語話者が苦手な音：

/r/ と /l/ の区別 — /l/ は舌先を歯茎につけ、/r/ はどこにもつけない: reflect /ɹɪˈflɛkt/, recall /ɹɪˈkɔl/, lateral /ˈlætəɹəl/, traditionally /tɹəˈdɪʃ.ə.nə.li/, tubular /ˈt(j)ubjələɹ/
/v/ — /b/ にならないように、上の歯を下唇に当てる: nerve /nɝv/, cavity /ˈkæv.ɪt.i/, visible /ˈvɪzɪb(ə)l/, vessel /ˈvɛsəl/, variation /ˌvɛəɹiˈeɪʃn̩/
/f/ — 「フ」ではなく、上の歯と下唇で出す: superficial /ˌsupɚˈfɪʃəl/, reflect /ɹɪˈflɛkt/, inferior /ɪnˈfɪɹ.i.ɚ/, fiber /ˈfaɪ.bɚ/, confused /kənˈfjuːzd/

この動画での練習方法

まず声を出さずに動画を最後まで聞き、知らない単語をメモします。
まず0.75倍速で一文ずつシャドーイングし、慣れてきたら通常の速度に戻します。
自分の声を録音して元の音声と比べます。muscle, canal, reflectなどの単語に特に注意しましょう。

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。

シャドーイングのやり方: ステップ別の完全ガイドを読む →

シャドーイング練習: Abdominal Muscles & Inguinal Canal - Dissection Supplement - 動画で英語スピーキングを学ぶ

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