Related Experiment Video
Updated: Jun 23, 2026
04:03
Surgical Labyrinthectomy of the Rat to Study the Vestibular System
Published on: May 19, 2018
Changes in calbindin expression within the flocculus after unilateral labyrinthectomy in rats
Seok Min Hong1, Chang Il Cha, Byung Rim Park
1Department of Otorhinolaryngology-Head and Neck Surgery, Chuncheon Sacred Heart Hospital, Hallym University College of Medicine, Chuncheon 200-704, Republic of Korea.
Neuroscience Letters
|May 19, 2009
Summary
Calbindin expression in rat flocculus transiently decreased after unilateral labyrinthectomy (UL). This reduction in calbindin-positive Purkinje cells may impact vestibular compensation by altering inhibitory signaling.
Area of Science:
- Neuroscience
- Vestibular System Research
- Cellular Biology
Background:
- The flocculus's role in vestibular compensation remains debated.
- Calbindin is a key marker for Purkinje cells, regulating intracellular signaling.
Purpose of the Study:
- To investigate calbindin expression in the flocculus after unilateral labyrinthectomy (UL) in rats.
- To understand the cellular mechanisms underlying vestibular compensation.
Main Methods:
- Immunohistochemistry was used to examine calbindin expression.
- Rats underwent unilateral labyrinthectomy (UL).
- Calbindin-positive Purkinje cells in the flocculus were quantified.
Main Results:
- A transient decrease in calbindin staining intensity and cell number was observed in the ipsilateral flocculus 6 hours post-UL.
- Calbindin expression returned to control levels by 48 hours post-UL.
- Asymmetry in bilateral flocculus calbindin expression subsided over time.
Conclusions:
- The transient reduction in calbindin suggests a temporary decrease in GABAergic inhibition from floccular Purkinje cells to the vestibular nuclei.
- This modulation may play a role in the dynamic process of vestibular compensation.
- Calbindin serves as a sensitive indicator of functional changes in Purkinje cells during vestibular adaptation.
