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Dopamine . by Leila Burridge and Emily Little. Dopamine and It’s Uses. Neurotransmitter Helps transmit signals in brain and other vital areas Found in humans and animals, including vertebrates and invertebrates Mainly inhibitory

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by Leila Burridge and Emily Little

dopamine and it s uses
Dopamine and It’s Uses
  • Neurotransmitter
  • Helps transmit signals in brain and other vital areas
  • Found in humans and animals, including vertebrates and invertebrates
  • Mainly inhibitory
  • Involved in voluntary movement, learning, arousal, and feelings of pleasure
  • Strongly determines motivation
dopamine production in the brain
Dopamine Production in the Brain
  • Produced naturally in the body
  • Found in the regions of the brain that regulate movement, emotion, motivation and the feeling of pleasure
  • Produced in the dopaminergic neurons in the ventral tegmental area (VTA)
  • Produced in the substantia nigra pars compacta
  • Produced in the arcuate nucleus of the hypothalamus
what causes an excess of dopamine
What causes an Excess of Dopamine?

Internal Causes:

  • High levels of stress
  • Sleep quantity and quality
  • Food

External Causes:

  • Medications
  • Drug abuse of drugs such as cocaine and amphetamines can lead to drug-induced psychosis and schizophrenia
  • Nicotine
effects of excess dopamine in brain
Effects of Excess Dopamine in Brain
  • Weak-willed, impulsive behaviour
  • Need for instant gratification
  • Lack of motivation
  • High levels of dopamine are found in patients with AD/HD
  • Suspicious personality, paranoia, withdrawal from social situations
what causes a dopamine deficiency
What causes a Dopamine Deficiency?

Dopamine levels drop due to

  • Stress
  • Certain Antidepressants
  • Drug and Alcohol use
  • Poor nutrition
  • Lack of Sleep
  • Excessive Caffeine intake
  • Excessive Sugar intake
effects of dopamine deficiency
Effects of Dopamine Deficiency

Lack of Dopamine in the brain can cause

  • Onset of Parkinson's Disease
  • Restless Leg Syndrome
  • Creativity
  • Sleep Problems
  • Depression
  • Trouble Focusing
arvid carlsson
Arvid Carlsson
  • Researched dopamine extensively in the late 1950’s.
  • Showed that dopamine was a neurotransmitter in the brain and not just a precursor of norepinephrine.
  • Discovered that a lack of dopamine in some areas of the brain could disrupt pathways among nerves that control movement and motor functions.
  • This causes Parkinson’s disease.
  • Parkinson’s disease symptoms: tremors, rigid muscles, speech changes, etc.
  • Carlsson developed a drug called levadopa (L-dopa) to treat Parkinson’s disease.
  • L-dopa transforms into dopamine in the brain and helps to relieve Parkinson’s symptoms.
  • Haralambos, Michael, and David Rice. Psychology in Focus. Ormskirk: Causeway, 2000. Print.