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Investigating Long-term Synaptic Plasticity in Interlamellar Hippocampus CA1 by Electrophysiological Field Recording
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Bilateral hippocampal dysfunction in schizophrenia.

Faith M Hanlon1, Jon M Houck, Clinton J Pyeatt

  • 1The Mind Research Network, Pete and Nancy Domenici Hall, 1101 Yale Blvd. NE, Albuquerque, NM 87106, USA. fhanlon@mrn.org

Neuroimage
|July 19, 2011
PubMed
Summary
This summary is machine-generated.

This study used the transverse patterning task to investigate lateralized hippocampal function. Results show controls exhibit distinct right and left hippocampal activation for nonverbal and verbal tasks, respectively, unlike schizophrenia patients.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Psychiatry

Background:

  • The hippocampus is crucial for memory, with proposed lateralized functions: right for visuo-spatial, left for verbal/episodic memory.
  • Previous neuroimaging studies have not identified a task that differentially activates both hippocampi.

Purpose of the Study:

  • To assess lateralized hippocampal function using a modified transverse patterning (TP) task.
  • To determine if schizophrenia patients exhibit lateralized hippocampal deficits.

Main Methods:

  • Magnetoencephalography (MEG) was used to record brain activity in controls performing verbal and nonverbal TP tasks.
  • Schizophrenia patients and controls completed verbal and nonverbal TP, along with matched control tasks.

Main Results:

  • Controls showed greater right hippocampal activation during nonverbal TP and left hippocampal activation during verbal TP.
  • Schizophrenia patients performed worse on both verbal and nonverbal TP compared to controls.
  • Patients showed no performance deficit on non-hippocampal control tasks, indicating a specific hippocampal issue.

Conclusions:

  • The transverse patterning task can effectively assess lateralized hippocampal function.
  • Schizophrenia is associated with bilateral hippocampal deficits in both behavior and activation.