The musculature of the mystacial vibrissae of the white mouse.
The musculature of the mystacial vibrissae of the white mouse.
复制标题
白鼠神秘触毛的肌肉组织。
作者：
J. Dörfl
常见的白化病小鼠的眼肌区的横纹肌已被描述。它们分为两类：外在的和内在的。四块肌肉（M。提上唇肌颌唇肌鼻横肌鼻肌）属于面部肌肉。它们起源于头骨，并插入到触须之间的真皮中。它们的收缩使整个神秘区域向取决于它们起源的方向移动。内在肌（毛囊肌）仅与触须毛囊相关，没有骨性附着。在A、B行的所有卵泡周围以及C、D和E行的前6个卵泡周围发现了它们。毛囊肌的形式是连接同一排相邻两个毛囊的吊索。悬带的弧围绕着头侧毛囊的下部，两端插入尾侧毛囊的锥形体和邻近的真皮。它们是触须的量角器。鼻毛毛囊的下部固定在一条纤维带中，纤维带插入口吻的前部。有人提出，这些带在触须的延长过程中被拉伸，并且在毛囊肌肉收缩结束时立即通过它们的弹性收缩，执行触须快速返回到它们的静止、缩回位置。
Striated muscles of the mystacial region of the common albino mouse have been described. They were divided into two categories: extrinsic and intrinsic. The four extrinsic muscles (m. levator labii superioris, m. maxillolabialis, m. transversus nasi, m. nasalis) belong to the facial muscles. They originate on the skull and insert into the corium between the mystacial vibrissae. Their contraction moves the whole mystacial region in directions dependent on their origins. Intrinsic (follicular) muscles are associated solely with the vibrissal follicles and have no bony attachment. They were found around follicles alpha, beta, gamma, delta, around all follicles of rows A and B, and around the first six follicles of rows C, D and E. The form of the follicular muscle is a sling connecting two adjacent follicles of the same row. The arc of the sling surrounds the inferior part of the rostral follicle and the two extremities insert to the conical body of the caudal follicle and to the neighbouring corium. They are the protractors of the vibrissae. The inferior parts of the vibrissal follicles of a given row are fixed in a fibrous band which inserts in the anterior part of the muzzle. It is proposed that these bands become stretched during the protraction of vibrissae and contract, by their elasticity, immediately upon the end of the follicular muscles' contraction, executing the fast return of vibrissae to their resting, retracted position.