Protection of the Central nervous system

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Last updated 3:40 AM on 7/23/26
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7 Terms

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Protective Bone

Brain - Skull

Spinal cord - Vertebral column

OR Axial skeleton

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Protective Meninges

  • Dura mater

  • Arachnoid mater

  • Pia mater

3 layers of connective tissue covering the CNS.

Cushion external forces, provide support and a barrier against infection.

<p>3 layers of connective tissue covering the CNS.</p><p>Cushion external forces, provide support and a barrier against infection.</p>
3
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Protective Meninges

  • Dura mater

  • Arachnoid mater

  • Pia mater

‘Dura’ - Tough

‘mater’ - Mother

Tough mother 👵

  • Outermost layer (superficial)

  • Tough, strong texture

  • Directly attached to the skull for stability

  • Not attached to the vertebral column to allow mobility

<p>‘Dura’ - Tough</p><p>‘mater’ - Mother</p><p>Tough mother <span data-name="older_woman" data-type="emoji">👵</span> </p><ul><li><p>Outermost layer (superficial)</p></li><li><p>Tough, strong texture</p></li><li><p>Directly attached to the skull for stability</p></li><li><p>Not attached to the vertebral column to allow mobility</p></li></ul><p></p>
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Protective Meninges

  • Dura mater

  • Arachnoid mater

  • Pia mater

‘Arachnoid’ - Spider

‘mater’ - Mother

Spider mother 🕷 🕸

  • Middle layer

  • Web-like appearance

  • Interstitial space formed is called the ‘subarachnoid space’

    • Contains blood vessels & cerebrospinal fluid

    • Provides cushioning

<p>‘Arachnoid’ - Spider</p><p>‘mater’ - Mother</p><p>Spider mother <span data-name="spider" data-type="emoji">🕷</span>&nbsp;<span data-name="spider_web" data-type="emoji">🕸</span> </p><ul><li><p>Middle layer</p></li><li><p>Web-like appearance</p></li><li><p>Interstitial space formed is called the&nbsp;‘subarachnoid space’</p><ul><li><p>Contains blood vessels &amp; cerebrospinal fluid</p></li><li><p>Provides cushioning</p></li></ul></li></ul><p></p>
5
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Protective Meninges

  • Dura mater

  • Arachnoid mater

  • Pia mater

‘Pia’ - Gentle

‘mater’ - Mother

Gentle mother 🕊

  • Deepest layer

  • Delicate & fragile

    • Directly in contact with the brain & spinal cord

  • Tiny blood vessels provide brain nutrients

<p>‘Pia’ - Gentle</p><p>‘mater’ - Mother</p><p>Gentle mother <span data-name="dove" data-type="emoji">🕊</span> </p><ul><li><p>Deepest layer</p></li><li><p>Delicate &amp; fragile</p><ul><li><p>Directly in contact with the brain &amp; spinal cord</p></li></ul></li><li><p>Tiny blood vessels provide brain nutrients</p></li></ul><p></p>
6
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Protective cerebrospinal fluid (CSF)

  • Produced in the choroid plexus

  • Found in subarachnoid space

  • Surrounds brain & spinal cord

Functions:

  • Shock-absorption

  • Buoyancy - keeps brain & spinal cord floating

  • Delivers nutrients

  • Removes wastes

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Protective epidural fat

  • Found in the epidural space of the vertebral canal

    • ‘Epi’ - On top

    • ‘Dura’ - Dura mater

    • Epidural space - Space above the dura mater

Functions:

  • Shock-absorption

  • Protects spinal cord from bumps & pressure

  • Supports blood vessels

  • Stabilises spinal cord

<ul><li><p>Found in the epidural space of the vertebral canal</p><ul><li><p>‘Epi’ - On top</p></li><li><p>‘Dura’ - Dura mater</p></li><li><p>Epidural space - Space above the dura mater</p></li></ul></li></ul><p></p><p>Functions:</p><ul><li><p>Shock-absorption</p></li><li><p>Protects spinal cord from bumps &amp; pressure</p></li><li><p>Supports blood vessels</p></li><li><p>Stabilises spinal cord</p></li></ul><p></p>