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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Whisking in animals ： ウィキペディア英語版 Whisking in animals Whisking is a behaviour in which the facial whiskers (vibrissae) of an animal are repetitively and rapidly swept back and forth. This behaviour occurs particularly during locomotion and exploration. The whisking movements occur in bouts of variable duration, and at rates between 3 to 25 whisks/second. Movements of the whiskers are closely co-ordinated with those of the head and body, allowing the animal to locate interesting stimuli through whisker contact, then investigate them further using both the macrovibrissae and an array of shorter, non-actuated microvibrissae on the chin and lips. Whisking has been reported in a wide range of mammals, including two species of marsupial. Whisking contributes both to exploratory movements, which function to acquire sensory inputs, and to palpation movements, which are used in the discrimination of objects and in the control of spatial navigation. ==Types== There are three types of whisking. Exploratory whisking occurs when animals whisk in air without contact or with only light contact. In this case, the stroke on a given whisk approaches 70°, and a total field of up to 160° may be covered as the animal slowly shifts the set point of its whisk. Such whisking is extremely regular and typically occurs with a frequency between 7 to 12 Hz and a mean of 9 Hz. Asymmetric whisking occurs when animals make contact with a large object, such as a wall, while they whisk. It also occurs if they turn their head to the side while whisking. Asymmetric whisking lasts for only one to three whisk cycles. Foveal whisking occurs when animals thrust all their vibrissae forward to palpate an object ahead of them, as occurs when they try to detect a landing on the far side of a gap. In this case the stroke is much reduced, typically to 20°. The frequency of foveal whisking is high, ranging between 15 and 25 Hz, and rats can readily switch between foveal and exploratory whisking. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Whisking in animals」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.