Backenköhler U, Strasmann T J, Halata Z
Department of Functional Anatomy, School of Medicine, University Hospital Eppendorf, Hamburg, Germany.
Anat Rec. 1997 Jul;248(3):433-41. doi: 10.1002/(SICI)1097-0185(199707)248:3<433::AID-AR16>3.0.CO;2-Q.
We investigated the pattern of distribution of corpuscular sensory nerve endings in the shoulder region of the laboratory mouse in relation to their functional properties.
Twelve adult female white NMRI-F2-mice were used. The topography of sensory nerve endings in the shoulder joint region was reconstructed by three-dimensional image processing by using serial silver-stained sections of paraffin-embedded samples. Semithin sections obtained from additional samples were used for light microscopy.
Within the fibrous layer of the joint capsule, three types of mechanoreceptors were identified: small lamellated corpuscles of the Pacini type, Ruffini corpuscles, and Golgi tendon organs. Intracapsular small lamellated corpuscles of the Pacini type (in an average number of 29/joint) were found mainly in three areas: in the predominantly flaccid tissue of the axillary region, in the denser ventromedial parts of the capsule, close to the scapula, and in the tight texture of the fiber bundles near the glenoid labrum. Ruffini corpuscles were identified only in small numbers (2/joint) in the ventral aspect of the articular capsule of two animals. Golgi tendon organs (14 or 15 receptors/joint) were discovered predominantly in close vicinity to the joint capsule at the muscle tendon junction of the inserting rotator cuff muscles and in the biceps brachii and triceps brachii muscles.
In view of their location in the shoulder joint capsule and the glenoid labrum, corpuscular mechanoreceptors evidently play an important role in joint control by inducing protective reflex actions in phases of extreme or abnormal movement. The density of sensory receptors in distinct areas of the shoulder joint capsule appears to be related to zones that are subjected to increased biomechanical stress during physical activity.
我们研究了实验室小鼠肩部区域的小体感觉神经末梢的分布模式及其功能特性。
使用12只成年雌性白色NMRI-F2小鼠。通过对石蜡包埋样本的连续银染切片进行三维图像处理，重建肩关节区域感觉神经末梢的地形图。从额外样本中获取的半薄切片用于光学显微镜检查。
在关节囊的纤维层内，鉴定出三种类型的机械感受器：帕西尼型小薄片小体、鲁菲尼小体和高尔基腱器官。关节囊内的帕西尼型小薄片小体（平均每关节29个）主要分布在三个区域：腋窝区域主要为松弛组织处、靠近肩胛骨的关节囊较致密的腹内侧部分以及肩胛盂唇附近纤维束紧密的结构中。仅在两只动物关节囊腹侧发现少量鲁菲尼小体（每关节2个）。高尔基腱器官（每关节14或15个感受器）主要在插入肩袖肌的肌腱交界处的关节囊附近以及肱二头肌和肱三头肌中发现。
鉴于其在肩关节囊和肩胛盂唇中的位置，小体机械感受器显然在极端或异常运动阶段通过诱发保护性反射动作在关节控制中发挥重要作用。肩关节囊不同区域的感觉受体密度似乎与身体活动期间承受增加生物力学应力的区域有关。
