ABSTRACT
Peroneal neuropathy is the common mononeuropathy of the lower extremities in adults. The documented etiologies for peroneal nerve injury include trauma, traction, and external compression. Fibular neck is the most common site of common peroneal nerve (CPN) injury as the nerve lies superficial and vulnerable for injury. A 50-year-old male presented with foot drop in his left leg after working in squatting position for prolonged hours along with sensory disturbance in dorsum of left foot. Clinical examination showed poor dorsiflexion in both side ankle with preserved plantar flexion. Electrophysiological findings locate the site of lesion to be CPN at the level of fibular neck. We conclude that CPN is injured due to knee flexion in farmers repeatedly squatting for long hours. Superficial peroneal nerve may be spared due to their interfascicular arrangement at the level of fibular neck placing deep peroneal nerve near the fibula making them more susceptible to compression type of injury. Peroneal nerve may be damaged at multiple sites including ankle. The condition can be reversed with conservative treatment, primarily by avoiding the precipitating position.
ABSTRACT
Objective To study the effect of using different tibial nerve proximal muscle branchs to repair deep peroneal nerve injury in animal experiment, and to screen out the most optimal donor nerve branch. Methods From June, 2016 to August, 2016, 64 adult female SD rats were randomly divided into 4 groups, which were LHG (using lateral head of gastrocnemius to repair peroneal nerve), MHG(using medial head of gastrocnemius to repair peroneal nerve), SNB (using soleus nerve branch to repair peroneal nerve), and blank. There were16 rats in each group. At 4 and 8 weeks after surgery, each group were tested on behavior, electrophysiology, muscle tension, muscle wet weight and histology, to evaluate function recovery of the muscles controlled by deep peroneal nerve in each group, and to compare recovery of the deep peroneal nerve repaired by different tibial nerve branches. Results Eight weeks after surgery,right foot of the rats in LHG,MHG and SNB group can be extended,toes can be completely opened. Rats in blank group showed limping gait, whose right foot can not be extended, right toe can not be opened, and muscle atrophied. At 4 and 8 weeks after the operation, the recovery rate of LHG, MHG, SNB group (at 4th weeks, 33.60 ±2.22)%, 33.07 ±2.38% and 35.91 ±2.02%; at 8th weeks, 67.16 ±5.74)%, 66.56 ±3.18% and 73.17 ± 5.33%, respectively)was higher than blank group(7.71±1.05% and 7.84±0.78%, respectively)on CMAP amplitude, tibialis anterior muscle contractility, tibialis anterior muscle cell area, muscle cell area. SNB group was superior to the LHG group and LHG group.And the difference was statistically significant(P<0.05). Conclusion All the proxi-mal tibial nerve muscle branchs can be used to repair the deep peroneal nerve injury, and the soleus nerve branch is the preferred donor nerve.
ABSTRACT
Common peroneal nerve injury has been reported as the most frequent lower extremity peripheral nerve injury. The peroneal nerve may be particulary prone to direct or indirect injury by penetrating trauma or external compression by it's superficial route to bony prominence of fibular neck. By the development of microsurgical technique, recently epineural repair, fascicular group repair, and interfascicular graft were tried. The authors have experienced five cases microsurgical repair of common peroneal nerve injury around the knee joint from December 1990 to November 1991, and motor and sensory result was relatively good.