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Related Experiment Video

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Spatial memory in nonhuman primates implanted with the subdural pharmacotherapy device.

Nandor Ludvig1, Hai M Tang2, Shirn L Baptiste2

  • 1Translational Neuroscience Consultation, P.O. Box 389, Mohegan Lake, NY 10547, USA.

Behavioural Brain Research
|March 17, 2015
PubMed
Summary

The Subdural Pharmacotherapy Device (SPD) safely maintains spatial memory in macaques. This device, implanted over brain regions crucial for memory, showed no negative impact on the animals' cognitive abilities during long-term use.

Keywords:
Frontal cortexMacaqueMuscimolParietal cortexSubarachnoid space

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Area of Science:

  • Neuroscience
  • Primate Cognition
  • Medical Device Technology

Background:

  • Spatial memory is crucial for survival and relies on complex neural circuitry.
  • The Subdural Pharmacotherapy Device (SPD) is a novel technology for targeted drug delivery to the brain.
  • Assessing the impact of novel neurosurgical devices on cognitive function is essential.

Purpose of the Study:

  • To evaluate the influence of the Subdural Pharmacotherapy Device (SPD) on spatial memory in bonnet macaques.
  • To determine if SPD implantation and function affect cognitive processes in the parietal/frontal cortex.
  • To assess the safety and efficacy of long-term SPD use in nonhuman primates.

Main Methods:

  • Three adult male bonnet macaques underwent SPD implantation over the right parietal/frontal cortex.
  • Spatial memory was assessed using a delayed non-match-to-sample task with baited and non-baited food ports.
  • The study employed a within-subject design, comparing performance before and after SPD implantation with saline and muscimol delivery.

Main Results:

  • Macaques showed a significant reduction in spatial memory errors after SPD implantation and saline delivery (P<0.001).
  • Performance improved from a mean of 373.3 errors pre-implantation to 5.7 errors by the 8th post-implantation session.
  • Delivery of the GABAA agonist muscimol via the SPD did not impair spatial memory performance.

Conclusions:

  • Complication-free implantation and months of SPD use over critical cortical areas do not impair spatial memory in nonhuman primates.
  • The SPD is a viable tool for investigating neuropharmacology and treating neurological disorders without compromising cognitive function.
  • This study supports the potential of the SPD for future therapeutic applications in primate models and potentially humans.