Socially dependent auditory laterality in domestic horses (Equus caballus)
Socially dependent auditory laterality in domestic horses (Equus caballus)
复制标题
DOI：
10.1007/s10071-009-0220-5
复制
发表时间：
2009-07-01
期刊：
影响因子：
2.7
通讯作者：
Lemasson, Alban
中科院分区：
文献类型：
--
作者：
Basile, Muriel;Boivin, Sarah;Lemasson, Alban
偏侧性是脊椎动物中普遍存在的现象。特别是，听觉处理的偏侧性已经在许多物种中得到证实，特别是鸣禽和灵长类。这种半球的专门化已经被证明取决于声音结构，物种特异性和刺激类型等因素。尽管有一些研究表明了这种影响，但人们对社会熟悉度可能产生的影响知之甚少。在这里，我们测试的熟悉程度的影响，在国内马的听觉反应的偏侧化。该物种以其社会系统而闻名，并对声音表现出明显的反应，一两只耳朵向声源移动。通过比较不同的同种whinnies（组成员，邻居和陌生人）的播放这样的反应，我们可以证明一个明确的左半球（LH）的偏好熟悉的邻居的电话，而没有偏好组成员和陌生人的电话。然而，我们发现了一个相反的模式，耳侧偏好邻居与陌生人的电话。这些结果是，据我们所知，第一次证明在有蹄类动物的听觉偏侧。他们打开了进一步的思路的影响，社会“价值”的电话和听众的唤醒听觉处理和偏侧化。
Laterality is now known to be an ubiquitous phenomenon among the vertebrates. Particularly, laterality of auditory processing has been demonstrated in a variety of species, especially songbirds and primates. Such a hemispheric specialization has been shown to depend on factors such as sound structure, species specificity and types of stimuli. Much less is known on the possible influence of social familiarity although a few studies suggest such an influence. Here we tested the influence of the degree of familiarity on the laterality of the auditory response in the domestic horse. This species is known for its social system and shows visible reactions to sounds, with one or two ears moving towards a sound source. By comparing such responses to the playback of different conspecific whinnies (group member, neighbor and stranger), we could demonstrate a clear left hemisphere (LH) preference for familiar neighbor calls while no preference was found for group member and stranger calls. Yet, we found an opposite pattern of ear side preference for neighbor versus stranger calls. These results are, to our knowledge, the first to demonstrate auditory laterality in an ungulate species. They open further lines of thought on the influence of the social "value" of calls and the listener's arousal on auditory processing and laterality.