Bagolini B, Campos E C, Fonda S, Schönhuber R, Vecchi D
Doc Ophthalmol. 1986 Feb 28;62(2):149-59. doi: 10.1007/BF00229126.
A differentiation of two types of head-turns due to nystagmus, by means of electromyography (EMG) is demonstrated in this paper. The first type is represented by patients who actively block the nystagmus, by means of an increase of discharge of the extraocular muscles who are synergistic and responsible for the head-turn. This block has the same features of the block of nystagmus in convergence and usually exceeds 10-15 degrees from the primary position. The second type is made out of patients whose head-turn is explained with the null-position of Kestenbaum. Here the nystagmus simply disappears in the position of head-turn, which usually is of no more than 10-15 degrees. Both types of patients show the same electronystagmographic features in the position of head-turn. This differentiation is useful from the clinical standpoint. In fact, only the first type of head-turn may require, besides a classical Anderson or Kestenbaum procedure, also a posterior fixation suture according to Cüppers. This operation would be useless in the second type of head-turn. Clinical signs useful for differentiating these two types of head-turn are presented as well.
本文展示了通过肌电图（EMG）对两种因眼球震颤引起的头部转动进行区分。第一种类型表现为患者通过协同且导致头部转动的眼外肌放电增加来主动阻断眼球震颤。这种阻断具有集合时眼球震颤阻断的相同特征，并且通常从初始位置超过10 - 15度。第二种类型由头部转动可用凯斯滕鲍姆零位来解释的患者组成。在此，眼球震颤在头部转动位置时 simply 消失，该位置通常不超过10 - 15度。两种类型的患者在头部转动位置时均表现出相同的眼震电图特征。这种区分从临床角度来看是有用的。实际上，除了经典的安德森或凯斯滕鲍姆手术外，只有第一种类型的头部转动可能还需要根据屈佩斯法进行后固定缝线术。该手术在第二种类型的头部转动中是无用的。还介绍了有助于区分这两种类型头部转动的临床体征。 （注：原文中“simply”疑为“simply”拼写错误，这里按“simply”翻译为“仅仅，只是” ）
