Diaphragma Sellae Anatomy Quiz
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Questions and Answers

What is the thick outermost meningeal layer surrounding the brain and spinal cord?

  • Pia mater
  • Arachnoid mater
  • Subarachnoid space
  • Dura mater (correct)
  • Which meningeal layer directly beneath the dura mater is a fine, weblike avascular membrane?

  • Pia mater
  • Arachnoid mater (correct)
  • Subarachnoid space
  • Dura mater
  • What is the space between the arachnoid mater and the underlying pia mater called?

  • Dura space
  • Subarachnoid space (correct)
  • Pia-arachnoid space
  • Arachnoid mater space
  • From which artery do the meningeal arteries derive their arterial supply?

    <p>External carotid artery</p> Signup and view all the answers

    Which location is most vulnerable to injury in 50% of human traumatic brain injuries (TBIs)?

    <p>Temporal bone</p> Signup and view all the answers

    What craniometric point marks the thinnest part of the skull?

    <p>Pterion</p> Signup and view all the answers

    Which structure forms the roof of the sella turcica?

    <p>Diaphragma sellae</p> Signup and view all the answers

    What passes through the dural shelf to connect the hypothalamus with the pituitary gland?

    <p>Infundibulum</p> Signup and view all the answers

    Where do the main drainage sinuses from within the skull drain into?

    <p>Internal jugular veins</p> Signup and view all the answers

    Which type of veins form smaller valveless connections between intra- and extracranial regions?

    <p>Emissary veins</p> Signup and view all the answers

    Where do diploic canals, which harbor diploic veins, pass through?

    <p>Dura mater spinalis</p> Signup and view all the answers

    What is the function of dural venous sinuses?

    <p>Drain venous blood from the brain</p> Signup and view all the answers

    What can cause the formation of an epidural hematoma?

    <p>Injury to the branches of the middle meningeal artery</p> Signup and view all the answers

    What can happen when the midline deviates sideways due to pressure from an epidural hematoma?

    <p>Compression of CN III</p> Signup and view all the answers

    What is the function of the tentorium cerebelli?

    <p>Cover and support the cerebellum</p> Signup and view all the answers

    What happens when intracranial structures are compressed by an epidural hematoma?

    <p>'Down and out' positioning of the eye and fixed dilated pupil</p> Signup and view all the answers

    What separates the two cerebral hemispheres?

    <p>Falx cerebri</p> Signup and view all the answers

    Which artery can cause arterial bleeding leading to an epidural hematoma?

    <p>Middle meningeal artery</p> Signup and view all the answers

    What structures mainly reabsorb cerebrospinal fluid into the venous system in adults?

    <p>Pacchionian granulations</p> Signup and view all the answers

    Injuries to the scalp can result in the spread of germs into the dural venous sinuses through which types of veins?

    <p>Emissary veins and diploic veins</p> Signup and view all the answers

    Which veins connect the pial veins with the dural sinuses?

    <p>Bridging veins</p> Signup and view all the answers

    Subdural hematomas from traumatic brain injuries are primarily caused by the rupture of which type of veins?

    <p>Bridging veins</p> Signup and view all the answers

    During development, what do emissary veins represent in terms of the venous system connections?

    <p>Superficial connections between cranial veins and dural sinuses</p> Signup and view all the answers

    Apart from Pacchionian granulations, what other structures contribute to cerebrospinal fluid reabsorption into the venous system?

    <p>Arachnoid granulations and perineural sheaths</p> Signup and view all the answers

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