Function of the dorsal neck muscles and tbeir afferent in put in Lateral gaze

侧向凝视中颈背肌和传入神经的功能

• 批准号: 08640914
• 负责人: HIRAI Naoki
• 金额: $ 1.34万
• 依托单位: Kyorin University School of Medicine
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08640914/
• 关键词: motor control; eye movement; saccade; vestibuloocular reflex; sternocleidmastoid; 適応制御

To examine the role of the ventral neck muscles in lateral geze shift, the eye and head movements towards a visual target were analyzed in subjects with unilateral neck dissection and normal subjects. The eye position was derived by an electro-oculographic technique and the head position with a potentiometer on the helmet.When a peripheral target was lit, the eye made an initial saccade towards it and the head then began to turn towards it. The patients made a gaze shift to the target accurately as the normal subjects. However, decrease in the amplitude and increase in the duration of the head displacement from the values of the normal subject were observed in the patient. Accordingly, the trajectory of eye movement between two groups was different, especially when the target was presented out of the ouclomotor range (over 50 deg). In the patient, time for the gaze to reach the target was significantly longer, and the vestibulo-ocular reflex was almost suppressed during head movements. Moreover, when the subjects were ordered to continue to maintain their gaze direction towards the imaginary target after the target lamp was off, the patient showed a tendency that their gaze gradually deviated to the nasal direction due solely to unsteadiness of the eye position, probably reflecting a loss of appropriate afferent signals form the neck muscles to the oculomotor center.

为了研究颈腹肌在侧向格泽移位中的作用，分析了单侧颈清扫术患者和正常人的眼和头朝向视觉目标的运动。采用眼电图技术和头盔电位计测头位，当周围目标被照亮时，眼睛先向目标扫视，然后头部转向目标，患者与正常人一样准确地注视目标。然而，在患者中观察到头部位移的幅度从正常受试者的值减小并且持续时间增加。因此，两组之间的眼动轨迹是不同的，特别是当目标呈现在外视范围之外（超过50度）时。在患者中，凝视到达目标的时间明显更长，并且前庭眼反射在头部运动期间几乎被抑制。此外，当目标灯关闭后，受试者被命令继续保持他们的视线方向朝向假想目标时，患者表现出一种趋势，即他们的视线逐渐偏离到鼻侧方向，这仅仅是由于眼睛位置的不稳定，可能反映了从颈部肌肉到眼神经中枢的适当传入信号的丢失。

项目成果

Nakayama, K.: "Morphology of single primary spindle afferents of the in the intercostal muscles in the cat" J.comp Neurol. (in press).

Nakayama, K.：“猫肋间肌单初级纺锤体传入的形态学”J.comp Neurol。

Hirai, N: "Lateral gaze shift in patients with SCM dissection" Jpn J Physiol. 46. S146- (1996)

Hirai, N：“SCM 解剖患者的横向凝视转移”Jpn J Physiol。

Nakayama,K.: "Morphology of single primary spindle afferents of the intercostal muscles in the cat" J.Comp Neurol.(in press).

Nakayama,K.：“猫肋间肌单初级纺锤体传入的形态学”J.Comp Neurol.（出版中）。

Hirai, N: "Octivity of the-intercostalmuscle afferents in the lower thoracic segments during sponta meous breathing in the cat" Neurosci Res. 25. 301-304 (1996)

Hirai, N：“猫自发呼吸期间下胸段肋间肌传入神经的活动度”Neurosci Res。

Suzuki,T: "Effects of radicalneck surgery on head movement and the vestibuloocular reflex" Abstracts for Asian Oceanian Congress of Neurology. 143- (1996)

Suzuki,T：“颈根治手术对头部运动和前庭眼反射的影响”亚洲大洋洲神经病学大会摘要。