Correlation of brain stem auditory-evoked responses with cranium size and body weight of dogs

Harold. A. Pook From the Departments of Veterinary Internal Medicine (Pook) and Physiology (Steiss), Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 0W0, Canada.

Search for other papers by Harold. A. Pook in
Current site
Google Scholar
PubMed
Close
 BVSc
and
Janet E. Steiss From the Departments of Veterinary Internal Medicine (Pook) and Physiology (Steiss), Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 0W0, Canada.

Search for other papers by Janet E. Steiss in
Current site
Google Scholar
PubMed
Close
 PhD

Click on author name to view affiliation information

SUMMARY

Brain stem auditory-evoked responses were recorded in 9 male and 11 female clinically normal mature dogs, weighing between 2 and 36 kg. Mean wave latency for the entire group of dogs, using 60-dB hearing level click stimuli at 11/s for waves I to VII was: 1.41, 2.21, 2.85, 3.31, 3.71, 5.12, and 6.46 ms, respectively. The mean interpeak latency for waves I and V (ipliv) was 2.32 ms. Neither gender nor ear effect was detectable.

Positive correlation was observed between cranium length, cranium width, nasion-external auditory meatus interval, and body weight for wave-V latency and ipliv. Such correlation was not documented for wave I. The regression equations for their effects on ipliv were: cranium length, y = 0.05x + 1.85; cranium width, y = 0.07x + 1.32; nasion-external auditory meatus interval, y = 0.05x + 1.79; and body weight, y = 0.01x + 2.15. On the basis of any of the 3 variables of cranium size or body weight, the study population could be classified into groups of large and small dogs, with the large group having significantly (P < 0.05) longer latency for wave V and ipliv. It is recommended that the effect of size variation in dogs on brain stem auditory-evoked responses should be compensated for by use of the regression equation based on cranium length.

SUMMARY

Brain stem auditory-evoked responses were recorded in 9 male and 11 female clinically normal mature dogs, weighing between 2 and 36 kg. Mean wave latency for the entire group of dogs, using 60-dB hearing level click stimuli at 11/s for waves I to VII was: 1.41, 2.21, 2.85, 3.31, 3.71, 5.12, and 6.46 ms, respectively. The mean interpeak latency for waves I and V (ipliv) was 2.32 ms. Neither gender nor ear effect was detectable.

Positive correlation was observed between cranium length, cranium width, nasion-external auditory meatus interval, and body weight for wave-V latency and ipliv. Such correlation was not documented for wave I. The regression equations for their effects on ipliv were: cranium length, y = 0.05x + 1.85; cranium width, y = 0.07x + 1.32; nasion-external auditory meatus interval, y = 0.05x + 1.79; and body weight, y = 0.01x + 2.15. On the basis of any of the 3 variables of cranium size or body weight, the study population could be classified into groups of large and small dogs, with the large group having significantly (P < 0.05) longer latency for wave V and ipliv. It is recommended that the effect of size variation in dogs on brain stem auditory-evoked responses should be compensated for by use of the regression equation based on cranium length.

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 91 91 12
PDF Downloads 11 11 1
Advertisement