Munro K J, Shiu J N, Cox C L
Hearing and Balance Centre, University of Southampton.
Br J Audiol. 1997 Oct;31(5):309-14. doi: 10.3109/03005364000000025.
Many studies have shown that the auditory brainstem response (ABR) is influenced by the sex of the subject. The explanation offered most often for this sex difference is the smaller head size and brain dimensions in the female. Since breeds of dog have different head sizes, this makes them useful subjects to test the hypothesis that ABR latency covaries with head size. Subjects comprised 20 Dalmatians and 20 Jack Russell terriers. The maximum width of the head was 123 +/- 8 mm in the Dalmatian and 88 +/- 5 mm in the Jack Russell. An auditory brainstem response was carried out using a click stimulus at 75 dB nHL. The latency of wave V and the I-V interval was longer (0.3 and 0.17 ms respectively) in the Dalmatian, although the correlation of these measurements with head size (which ranged from -0.2 to +0.3) was not statistically significant. These findings do not support the theory that differences in ABR latency are due to differences in head size per se. Correlation of latency with body temperature and with age was also weak and not statistically significant.
许多研究表明，听觉脑干反应（ABR）受受试者性别的影响。对于这种性别差异，最常给出的解释是女性的头部尺寸和脑容量较小。由于不同犬种的头部尺寸不同，这使得它们成为检验ABR潜伏期与头部尺寸共变这一假设的有用对象。受试对象包括20只斑点狗和20只杰克罗素梗犬。斑点狗的头部最大宽度为123±8毫米，杰克罗素梗犬为88±5毫米。使用75 dB nHL的短声刺激进行听觉脑干反应测试。尽管这些测量值与头部尺寸（范围为-0.2至+0.3）的相关性无统计学意义，但斑点狗的V波潜伏期和I-V间期更长（分别为0.3和0.17毫秒）。这些发现不支持ABR潜伏期差异是由于头部尺寸本身不同这一理论。潜伏期与体温和年龄的相关性也较弱，且无统计学意义。
