Cerebral white matter and basal nuclei - composition and functions

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Last updated 2:30 PM on 4/13/26
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8 Terms

1
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Where is cerebral white matter located?

  • Internal to gray matter

<ul><li><p>Internal to gray matter</p></li></ul><p></p>
2
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What is the main function of cerebral white matter?

  • Communication within the CNS

  • “communication railway”

3
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What is cerebral white matter composed of?

  • Myelinated axons organised into tracts

4
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What do tracts in cerebral white matter do?

  • conduct information between the two cerebral hemispheres

  • conduct information between cortical areas in the same hemisphere

  • conduct information between the cerebral cortex and lower parts of the CNS (e.g., thalamus, spinal cord)

5
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Where are the cerebral basal nuclei located?

  • Embedded deep within the white matter

  • Islands of gray matter deep within the white matter

<ul><li><p>Embedded deep within the white matter</p></li><li><p>Islands of gray matter deep within the white matter</p></li></ul><p></p>
6
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What is the main function of the basal nuclei?

  • Facilitate smooth skeletal muscle movements

  • Communicate with the motor areas of the cerebral cortex to facilitate smooth skeletal muscle movements

7
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What regulates the activity of the basal nuclei?

  • Dopamine

8
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What happens when dopamine is lost?

  • Basal nuclei become overactive, leading to Parkinson’s disease