Chakravarthy Marx S, Kumar P, Dhalapathy S, Anitha Marx C
Department of Anatomy, Kasturba Medical College, Manipal, Karnataka, India.
Rom J Morphol Embryol. 2011;52(2):605-11.
Secondary to peripheral nerve injuries, involvement of sympathetic fibers complications such as Complex Regional Pain Syndrome (CRPS) have been reported. There are no reports available in the distribution of the sympathetic fibers/areas of sensory nerves in the forearm.
The present study aim is an attempt to find the distribution of sympathetic fibers in the anterior branch of medial antebrachial cutaneous nerve of forearm (AMACN), lateral antebrachial cutaneous nerve of forearm (LACN) and superficial branch of radial nerve (SBRN) at cubital fossae. We have studied on 17 fresh human cadaveric AMACN, LACN and SRBN samples. Frozen sections of these nerves were processed by immunohistochemical (tyrosine hydroxylase) method for sympathetic fibers.
Sympathetic fibers area (Asym) was found to be more in SBRN when compared to AMACN and LACN. The comparison of the sympathetic index (SI = sympathetic fibers area / total fascicular area of the nerve) between AMACN and LACN (p-value < 0.001), AMACN and SBRN (p-value <0.001), LACN and SBRN (p-value < 0.001) were statistically significant. Sympathetic index (SI) for SBRN was more when compared to AMACN and LACN. SBRN had maximum percentage (5.16%) of Asym when compared with LACN and AMACN.
Sympathetic fibers area (Asym), sympathetic index (SI) and percentage of sympathetic fibers area (Asym %) were found to be more in SBRN when compared with AMACN and LACN. These results of the study might help to explain sympathetic system-related diseases in the area of distribution of AMACN, LACN and SBRN.
继发于周围神经损伤后，已有报道称交感神经纤维受累会引发复杂区域疼痛综合征（CRPS）等并发症。目前尚无关于前臂交感神经纤维分布/感觉神经区域的报道。
本研究旨在探寻前臂内侧皮神经前支（AMACN）、前臂外侧皮神经（LACN）和桡神经浅支（SBRN）在肘窝处的交感神经纤维分布。我们对17个新鲜人尸体的AMACN、LACN和SRBN样本进行了研究。这些神经的冰冻切片采用免疫组织化学（酪氨酸羟化酶）方法处理以检测交感神经纤维。
与AMACN和LACN相比，SBRN的交感神经纤维面积（Asym）更大。AMACN与LACN之间（p值<0.001）、AMACN与SBRN之间（p值<0.001）、LACN与SBRN之间（p值<0.001）的交感神经指数（SI = 交感神经纤维面积 / 神经总束面积）比较具有统计学意义。与AMACN和LACN相比，SBRN的交感神经指数（SI）更高。与LACN和AMACN相比，SBRN的Asym百分比最高（5.16%）。
与AMACN和LACN相比，SBRN的交感神经纤维面积（Asym）、交感神经指数（SI）和交感神经纤维面积百分比（Asym %）更高。本研究结果可能有助于解释AMACN、LACN和SBRN分布区域内与交感神经系统相关的疾病。
