Air- and bone-conduction brainstem auditory evoked potentials and flash visual evoked potentials in cats

Area of Science:

• Veterinary Neurology
• Neurophysiology
• Ophthalmology

Background:

• Brainstem auditory evoked potentials (BAEP) and visual evoked potentials (VEP) are crucial electrodiagnostic tools.
• Establishing normative data is essential for accurate interpretation of these tests in feline patients.
• Previous studies may lack comprehensive data for both air- and bone-conducted BAEP and flash VEP in cats.

Purpose of the Study:

• To document normal reference values for air- and bone-conducted BAEP in cats.
• To establish normal reference values for flash VEP in cats.
• To provide normative data for noninvasive electrodiagnostic evaluation of feline auditory and visual pathways.

Main Methods:

• Ten healthy mixed-breed cats underwent electrophysiological testing.
• BAEP were recorded using both air- and bone-conducted click stimuli.
• Flash visual evoked potentials (VEP) were recorded.
• Amplitudes and latencies of specific peaks were measured and analyzed.

Main Results:

• BAEP peak latencies increased and amplitudes decreased with decreasing stimulus intensity.
• Bone-conducted BAEP showed shorter transit times to the cochlea compared to air-conducted stimuli, but interpeak latencies were similar.
• VEP recordings were consistent with previous feline studies and comparable to other species.
• Normative data for BAEP and VEP were successfully generated.

Conclusions:

• The established normative data for BAEP and VEP are vital for clinical veterinary diagnostics.
• These findings enable noninvasive assessment of auditory and visual system function in cats.
• This study contributes essential reference values for feline neuro-ophthalmological evaluations.