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Modified activity of the human auditory cortex during auditory hallucinations.
J Tiihonen1, R Hari, H Naukkarinen
1Low Temperature Laboratory, Helsinki University of Technology, Finland.
The American Journal of Psychiatry
|February 1, 1992
Summary
Auditory hallucinations in schizophrenia patients cause small delays in brain responses, similar to how real sounds affect the auditory cortex. This suggests hallucinations impact brain activity in a manner comparable to external auditory stimuli.
Area of Science:
- Neuroscience
- Psychiatry
- Auditory Processing
Background:
- Schizophrenia is associated with abnormal brain metabolism and evoked responses.
- Auditory hallucinations are a common symptom in schizophrenia.
Purpose of the Study:
- To investigate the impact of auditory hallucinations on auditory cortex activity.
- To compare the brain's response to hallucinations versus real sounds.
Main Methods:
- Recording electric and magnetic auditory responses in two schizophrenia patients.
- Analyzing response delays during spontaneous, transitory auditory hallucinations.
Main Results:
- Observed small but replicable delays in auditory evoked responses during hallucinations.
- Demonstrated that hallucinations alter auditory cortex activity.
Conclusions:
- Hallucinations in schizophrenia affect auditory cortex processing.
- The neural impact of auditory hallucinations resembles that of actual auditory stimuli.