The<unk>  is a protective sheath that surrounds a nerve fascicle. This bundles together axons targeting the same anatomical location. The<unk>  is composed from fibroblasts. In the peripheral nervous system, the myelin sheath of each axon in a nerve is wrapped in a delicate protective sheath known as the endoneurium. Fascicles, bundles of neurons, are surrounded by the<unk> . Several fascicles may be in turn bundled together with a blood supply and fatty tissue within yet another sheath, the epineurium. This grouping structure is analogous to the muscular organization system of epimysium, perimysium and endomysium.
Perineurium
Tetracaine
Procaine
Tetrodocain
Iontocaine
Ibogaine
Methitural
Mivacurium chloride