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Related Experiment Video

Updated: Feb 11, 2026

Cochlear Implantation in the Guinea Pig
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A self-adjusting head holder without ear-bars for guinea pigs.

Sebastian Haidarliu1, Ehud Ahissar2, Inbar Saraf-Sinik2

  • 1Department of Neurobiology, The Weizmann Institute of Science, Rehovot, 76100, Israel. sebastian.haidarliu@weizmann.ac.il.

The Journal of Physiological Sciences : JPS
|April 23, 2018
PubMed
Summary

A novel self-adjusting head holder offers stable guinea pig head fixation without ear-bars, ideal for auditory research and MRI compatibility. This cost-effective device ensures precise positioning for various head sizes and weights.

Keywords:
Guinea pigHead holderTeeth anatomy

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Surgical Instrumentation

Background:

  • Stereotaxic devices require precise head fixation for research.
  • Traditional ear-bar methods can cause tissue damage and limit applications.
  • A need exists for adaptable, user-friendly head holders, especially for auditory studies and MRI.

Purpose of the Study:

  • To design and present a self-adjusting head holder for guinea pigs.
  • To enable stable and precise head positioning without ear-bars.
  • To provide manufacturing instructions for accessible, cost-effective versions.

Main Methods:

  • Development of a self-adjusting mechanism for head fixation.
  • Design considerations for accommodating various guinea pig head sizes (360-940 g).
  • Manufacturing protocols for stainless-steel and MRI-compatible plastic versions.

Main Results:

  • The head holder provides stable fixation and precise control of anterior-posterior, pitch, and roll.
  • The design eliminates the need for ear-bars, reducing tissue damage risk.
  • The holder is adaptable to a wide range of guinea pig weights and sizes.

Conclusions:

  • The self-adjusting head holder is a versatile, easy-to-use tool for stereotaxic procedures.
  • It is particularly beneficial for auditory system research and MRI applications.
  • Cost-effective manufacturing makes this device accessible to research laboratories.