تدريب Shadowing: SVINutes: Cerebral Venous Sinus Anatomy - تعلم التحدث بالإنجليزية عبر الفيديو
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Hi, thank you for tuning into this minute on venous sinus anatomy.
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So we're going to jump right in.
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And the most important thing to frame our discussion today is to really understand the circulation for the venous system.
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So that starts with understanding that the cerebrospinal fluid is predominantly made in the choriole plexus of the lateral ventricles.
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and then from there it's going to bathe the brain, flow through the cisterns, and then be absorbed through the arachnoid granulations.
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So this really shows how those arachnoid granulations are jutting into each one of those venous sinuses,
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and then from there the peripheral venous sinuses are predominantly going to drain from anterior to posterior,
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then around the sides of the ears and down the jugular vein.
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We're going to go through all of those details in the next slides.
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So first we need to remember that the venous sinuses are not like arteries.
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They are not pipes.
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They are instead spaces that are created between the dural leaflets.
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So between the periosteal layer aligning the skull and between the meningeal layer aligning the surface of the brain.
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And so because of that, as this slide is showing, they end up being a series of trabeculated spaces.
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They're not just one big open channel and they're not all created alike because of that.
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Also, you'll note the arachma granulation is jutting into those channels, which also can change the shape and the size of each one of those sinuses.
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Now that's true for the peripheral sinuses, like I just showed you, as well as for the deep sinuses.
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So in this slide this is the cavernous sinus with both a diagram
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and an angiogram side by side just to show that true trabeculation
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and that when you're traversing these spaces they are not just one big open tube
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but instead of more like finding the holes in Swiss cheese.
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So let's get through the the sinuses and the venous drainage.
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So starting with the peripheral anatomy what you can see at
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the top of the slide here is the superior sagittal sinus
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that's going to collect the venous drainage from the cortical veins starting anteriorly
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and then draining posteriorly back to the confluence of sinuses from
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the confluence you're going to drain both sides down the transverse sinuses out laterally
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and then down the sigmoid sinus into the jugular vein now those peripheral
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that peripheral drainage is going to be met by the deep venous drainage as well.
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So we're going to introduce that on this slide and then go into some details.
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So you're going to have the inferior sagittal sinus that's going to be lining the corpus callosum, so again that same c-shape going from anterior to posterior.
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When it gets down to the inferior border it's going to connect to that confluence by the straight sinus,
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again draining by the sigmoid sinuses and down the jugular vein.
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The other deep venous structures, which you can see here in the diagram we'll look at on this next slide.
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So predominantly we're talking about the internal cerebral veins and those are bilateral, the paired structures as well as the basal vein of Rosenthal, again bilateral.
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They're going to converge to create the great cerebral vein of Galen
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and then that is also going to empty into the straight sinus.
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So let's look at those individually.
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So for the internal cerebral vein, you want to think of that as draining all of the midline deep structures.
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So things like the fornix,
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the amygdala, the hippocampus, and of course the thalamus are all going to drain into those internal cerebral veins bilaterally,
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as opposed to the basal vein of Rosenthal, which is going to start collecting blood as anterior as the anterior cerebral veins,
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and then it's going to migrate back and around the cisterns
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and connect to that internal cerebral vein to create the vein of Galen.
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Now, it's important to note that each one of these sinus systems, both the deep sinus system and the superficial sinus system, both have anastomosis.
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So what I'm showing on this slide is the convergence of the superficial anastomosis.
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So that's going to be the superior cerebral vein, which is going to come in from the anterior surface.
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And it's going to anastomose with the vein of Trollard, which is going to be your predominant cortical vein that goes to the superior sagittal sinus.
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And with the vein of which is going to be your predominant venous drainage going into the transverse sinus.
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Now it's important to note that this is very uncommon pattern that I've shown here on the angiogram or the venogram, where all three are about the same size.
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They're all co-dominant truly.
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Usually one is much larger, another smaller, and just remember that that flow can go anterior
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and posterior through each of those channels to either drain through the more anterior deep drainage or more superficial posterior drainage.
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Now those variations
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we see every day and so this is an example of the transverse sinuses
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which in panel C are truly co-dominant
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but more commonly one is going to be dominant
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and the other one not and so that's what you're seeing in A
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and B where A the left transverse sinus is going to be the dominant drainage
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and and be the right transverse sinus is going to be the dominant drainage.
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And so we see this on imaging every day, but the key is to note that it can actually create pathology.
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So if you couple that with, for instance, an arachnid granulation at the transverse sigmoid junction, like in this slide, what you can see is that in this person,
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the left transverse sinus was the non-dominant sinus.
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The dominant drainage was through the right transverse sinus, and then you got this pinch point from that arachnoid granulation.
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So the pressures are shown on this slide and you can see
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that this person had intracranial hypertension with a pressure of 45 in the spherosagittal sinus
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but then we were able to stent that sinus to release
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that pressure and the pressure did normalize on the right side of the screen as soon as that stent was placed.
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So just to summarize what I've shown you, hopefully everybody can recognize some of the major cerebral veins and
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and the venous sinus drainage for both the superficial and deep venous sinus systems.
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There's much more complicated anatomy involved, but this gives you a kind of a high level overview.
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And so I thank you for taking the time and I hope you've enjoyed this minute.
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المفردات وملاحظات التحدث لهذا الدرس
يحتوي هذا الفيديو على 72 جملة و1111 كلمة للتدرب على الترديد. مدة الكلام 6:12. يتكلم المتحدث بسرعة طبيعية، نحو 179 كلمة في الدقيقة، قريبة من المحادثة اليومية. 75% فقط من الكلمات ضمن أكثر 3,000 كلمة شيوعًا في الإنجليزية، فالمفردات صعبة نسبيًا.
أهم المفردات في هذا الفيديو
15 كلمة من الفيديو تستحق التعلّم، مع النطق والمعنى:
| الكلمة | النطق | المعنى |
|---|---|---|
| vein اسم | /veɪn/ | وَرِيد, عِرْق |
| drainage اسم | /ˈdɹeɪnəd͡ʒ/ | تَصْرِيف |
| slide اسم | /ˈslaɪ̯d/ | زَحْلِيقَة, مَزْلَقَة |
| cerebral صفة | /səˈɹi.bɹəl/ | مُخِّيّ |
| dominant صفة | /ˈdɑmənənt/ | سَائِد |
| drain اسم | /dɹiːn/ | بَالُوعَة |
| anterior صفة | /ænˈtɪɹ.i.ɚ/ | أَمَامِيّ |
| superficial صفة | /ˌsupɚˈfɪʃəl/ | سَطْحِيّ |
| superior صفة | /sʊˈpɪɹ.i.ɚ/ | أَجْدَر, مُتَفَوِّق |
| anatomy اسم | /əˈnætəmi/ | تَشْرِيح |
| layer اسم | /ˈleɪ̯ɚ/ | طَبَقَة |
| connect فعل | /kəˈnɛkt/ | رَبَطَ |
| collect فعل | /ˈkɑlɪkt/ | جَمَعَ |
| diagram اسم | /ˈdaɪ.ə.ɡɹæm/ | مُخَطَط, رَسْم إِيضَاحِيّ |
| bilateral صفة | /baɪˈlætəɹəl/ | ثُنَائِيّ |
نطق يحتاج إلى انتباه
يستخدم المتحدث 18 من الصيغ المختصرة، مثل they're, we're, you're. انطقها بصيغتها القصيرة كما تسمعها.
- أصوات “th”: pathology /pəˈθɒləd͡ʒi/, bathe /beɪð/, thalamus /ˈθæləməs/
- أصوات “sh” و“zh”: superficial /ˌsupɚˈfɪʃəl/, variation /ˌvɛəɹiˈeɪʃn̩/, circulation /ˌsɝkjʊˈleɪʃən/, junction /ˈd͡ʒʌŋkʃən/, hypertension /ˌhaɪ.pɚˈtɛn.ʃən/
- الكلمات الطويلة — انتبه لموضع النبر: anterior /ænˈtɪɹ.i.ɚ/, peripheral /pəˈɹɪf(ə)ɹ(ə)l/, superficial /ˌsupɚˈfɪʃəl/, superior /sʊˈpɪɹ.i.ɚ/, anatomy /əˈnætəmi/
كيف تتدرب بهذا الفيديو
- استمع إلى الفيديو كاملًا مرة واحدة دون أن تتكلم، ودوّن الكلمات التي لا تعرفها.
- ابدأ بسرعة 0.75×، وردّد جملة جملة، ثم عُد إلى السرعة العادية عندما يصبح الأمر سهلًا.
- سجّل صوتك وقارنه بالأصل، مع الانتباه إلى كلمات مثل vein, drainage, slide.
القواعد في هذا الفيديو
أكثر التراكيب التي يستخدمها المتحدث، مع العبارات نفسها من الفيديو:
| التركيب | في الفيديو |
|---|---|
| المبني للمجهول be + اسم المفعول — التركيز على ما يحدث لا على من يفعله | is predominantly made · be absorbed · are created |
| المضارع التام have/has + اسم المفعول — حدث ماضٍ ما زال له أثر الآن | I've shown · you've enjoyed |
| جمل الوصل who / which + جملة — معلومة إضافية عن شخص أو شيء | Rosenthal, which is · vein, which is · Trollard, which is |
ما هي تقنية التظليل الصوتي؟
التظليل الصوتي (Shadowing) تقنية تعلم لغة مدعومة علمياً، طُورت أصلاً لتدريب المترجمين الفوريين المحترفين. الطريقة بسيطة لكنها قوية: تستمع لصوت إنجليزي أصلي وتكرره فوراً بصوت عالٍ — كظل يتبع المتحدث بتأخير 1-2 ثانية. تُظهر الأبحاث تحسناً كبيراً في دقة النطق والتنغيم والإيقاع وربط الأصوات والاستماع والطلاقة.