1.5.14

Chemical Brain Imbalances

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Chemical Brain Imbalances

Chemical imbalances in the brain can lead to ill health, including Parkinson’s disease and depression. Understanding these imbalances can help develop new drugs.

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Parkinson's disease

  • Parkinson’s disease develops when nerve cells that produce dopamine (a type of neurotransmitter) are lost.
  • Dopamine is important in coordinating body movement.
  • People with Parkinson’s disease will have symptoms such as a tremor, stiff muscles and slow movement.
  • Increasing dopamine levels can alleviate the effects of Parkinson’s disease.
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Depression

  • Low serotonin levels have been associated with depression.
  • Serotonin is a neurotransmitter thought to be associated with a ‘good mood’.
  • Some antidepressants work by increasing the serotonin levels in the body.
  • Low serotonin doesn’t necessarily cause depression, but increasing levels have been shown to alleviate some symptoms of depression.

Jump to other topics

1Principles of Science I

1.1Structure & Bonding

1.2Properties of Substances

1.3Cell Structure & Function

1.4Cell Specialisation

1.5Tissue Structure & Function

1.6Working with Waves

1.7Waves in Communication

2Practical Scientific Procedures and Techniques

3Science Investigation Skills

4Principles of Science II

4.1Extracting Elements

4.2Relating Properties to use of Substances

4.3Organic Chemistry

4.4Energy Changes in Industry

4.5The Circulatory System

4.6Ventilation & Gas Exchange

4.7Urinary System

4.8Cell Transport

4.9Thermal Physics

4.10Materials

4.11Fluids

5Contemporary Issues in Science

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