Distribution of intramuscular nerve and motor endplates in peroneus longus of rabbits

Objective To investigate the distribution of intramuscular nerves and motor endplates of muscle peroneus longus in rabbit,to provide morphologic datas of the distribution of intramuscular nerves.Methods Gross anotomy method,Modified sihler's staining and acetylcholinesterase staining method.Results Muscle peroneus longus is spindle in appearance in rabbit.Muscle tendon is long.Intramuscular nerves of muscle peroneus longus send out four primary branches in rabbit:Cross medial upside branch innervat medial upside of muscle;Medial inferior branch penetrate in wall and innervated medial fiber of middle and inferior of muscle;Lateral Inferior branch innervate lateral and middle muscle fiber of middle and inferior segment;Lateral upside branch is short and minute,located in lateral upside of muscle.Motor end plate forms a band and locates in circumferentia of muscle peroneus longus;On horizontal and sagittal plane,a black straight line motor endplate brand was seen.Conclusions Muscle peroneus longus is unipennate muscle in rabbit;Intramuscular nerves had many primary branches,and most parallelled with muscular long axis;Motor end plate arranged in ring.