Using one or more examples, explain effects of neurotransmission on human behaviour. (8)

Explain (8) – Detailed account including reasons or causes.


Kasamatsu & Hirai – Monk Serotonin Study (Serotonin)
[A] Investigate how sensory deprivation affects the brain.
  • Studied a group of Monks on a 72 hour pilgrimage to a mountain.
  • The Monks were not allowed to speak, eat or drink.
  • They were exposed to cold late autumn weather.
  • After 48 hours, the Monks started seeing hallucinations of ancestors and feeling their presence.
  • Researchers took blood samples before and after their pilgrimage.
  • The found increased level of serotonin in the Monks’ brain.
  • Especially in the Hypothalamus and Frontal Cortex.
  • Resulting in hallucination.
  • Sensory deprivation triggered the release of Serotonin.
  • Serotonin – responsible for Sleep, Arousal level, and Emotions.

Hietala – Presynaptic dopamine function study (Dopamine)
  • Measured by uptake of flurodopa (radioactive compound) was observed by a PET scan for 7 schizophrenic patients and 8 healthy people (controls).
  • The fluorodopa influx constant increased in schizophrenic patients.
  • Alterations in presynaptic dopamine function make people more inclined to have schizophrenia.