2-Minute Neuroscience: Blood Supply of the Brain

Neuroscientifically Challenged
5 Apr 201802:00

Summary

TLDRThis episode of '2 Minute Neuroscience' delves into the brain's blood supply. The internal carotid arteries provide 80% of the blood, branching into anterior and middle cerebral arteries. The vertebral arteries contribute the remaining 20%, forming the basilar artery and supplying the cerebellum and spinal cord. Notably, the Circle of Willis connects major arteries, ensuring blood flow even if a vessel is blocked.

Takeaways

  • 🚀 The internal carotid arteries supply about 80% of the brain's blood supply.
  • 🌿 The vertebral arteries contribute the remaining 20% of the brain's blood supply.
  • 🔄 The internal carotid arteries split into the anterior and middle cerebral arteries upon reaching the brain.
  • 🧠 The anterior cerebral arteries supply the medial frontal and parietal lobes.
  • 🔗 The anterior communicating artery connects the two anterior cerebral arteries.
  • 🌐 The middle cerebral arteries supply most of the lateral surface of the cerebral hemispheres.
  • 🌀 The internal carotids give rise to the anterior choroidal arteries, which supply various structures.
  • 🔄 The posterior communicating arteries connect the internal carotid arteries to the posterior cerebral arteries.
  • 🌱 The vertebral arteries form the basilar artery after giving rise to the posterior inferior cerebellar arteries.
  • 🌟 The basilar artery splits into two posterior cerebral arteries at the level of the midbrain.
  • 🔄 The Circle of Willis is an interconnection of the anterior cerebral, internal carotid, and posterior cerebral arteries, allowing for continued blood flow if a major vessel is blocked.

Q & A

  • What percentage of the brain's blood supply comes from the internal carotid arteries?

    -The internal carotid arteries supply about 80% of the brain's blood.

  • Which arteries provide the remaining 20% of the brain's blood supply?

    -The vertebral arteries supply the remaining 20% of the brain's blood.

  • What happens to the internal carotid arteries after they ascend to the brain?

    -After ascending to the brain, the internal carotid arteries split into the anterior and middle cerebral arteries.

  • Which areas of the brain are supplied by the anterior cerebral arteries?

    -The anterior cerebral arteries supply the medial frontal and parietal lobes.

  • How are the anterior cerebral arteries connected?

    -The anterior cerebral arteries are connected by the anterior communicating artery.

  • What do the middle cerebral arteries supply?

    -The middle cerebral arteries supply most of the lateral surface of the cerebral hemispheres.

  • What arteries arise from the internal carotid arteries before they split into the anterior and middle cerebral arteries?

    -Before splitting, the internal carotids give rise to the anterior choroidal arteries and the posterior communicating arteries.

  • What areas do the posterior inferior cerebellar arteries supply?

    -The posterior inferior cerebellar arteries supply the inferior surface of the cerebellum.

  • What happens when the two vertebral arteries come together?

    -The two vertebral arteries come together to form the basilar artery.

  • What is the Circle of Willis, and what is its function?

    -The Circle of Willis is a connection between the anterior cerebral, internal carotid, and posterior cerebral arteries of both sides of the brain. It allows blood flow to continue if a major vessel is blocked on one side of the brain.

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Ähnliche Tags
NeuroscienceBlood SupplyBrain AnatomyCerebral ArteriesCarotid ArteriesCerebellumCircle of WillisVertebral ArteriesHealth EducationMedical Overview
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