Ren Z, Liu B, Ma X
Dept. of Otolaryngology, First Affiliated Hospital of China Medical University, Shenyang 110001.
Chin Med Sci J. 1997 Mar;12(1):50-2.
To study the specialty of orbicularis oculi muscles, nerves and oris muscles, nerves and mechanism of difference of facial muscular injury in facial paralysis deeply.
The conductive velocity of the efferent nerves of orbicularis oculi and oris muscles of the health human beings and guinea pigs is measured with electromyogram (EMG) apparatus.
The conductive velocity of orbicularis oculi nerve is quicker and oris muscles are controlled by facial nerves on both sides. Measuring the threshold of Strength-Duration (S-D) curves of the motor point of orbicularis oculi and oris muscles shows the threshold of the former is lower. Measuring the diameter of orbicularis oculi and oris nerve fibers on the guinea pigs and rabbits shows the diameter of orbicularis oculi nerve fiber is bigger. The area of secondary synapse space of orbicularis oculi motor end plate is larger than that of oris under scanning electron microscope.
Orbicularis oculi muscles, orbicularis oculi nerves and oris muscles, oris nerves all have their own characteristic on physiology and anatomy. It elucidated the mechanism that orbicularis oculi muscle is easy to be injured.
深入研究眼轮匝肌、神经及口轮匝肌、神经的特性以及面神经麻痹时面部肌肉损伤差异的机制。
用肌电图仪测量健康人和豚鼠眼轮匝肌及口轮匝肌传出神经的传导速度。
眼轮匝肌神经传导速度较快，口轮匝肌受双侧面神经支配。测量眼轮匝肌和口轮匝肌运动点的强度-时间（S-D）曲线阈值，显示前者阈值较低。测量豚鼠和家兔眼轮匝肌和口轮匝肌神经纤维直径，显示眼轮匝肌神经纤维直径较大。扫描电镜下眼轮匝肌运动终板的次级突触间隙面积大于口轮匝肌。
眼轮匝肌、眼轮匝肌神经及口轮匝肌、口轮匝肌神经在生理和解剖上均有各自特点。阐明了眼轮匝肌易受损的机制。
