epineurium

Blood vessels of various sizes can be seen in the epineurium.

A type of surgery that involves the epineurium is epineurial repair.

The procedure can be applied to any nerve epineurium.

Finally, the entire nerve is wrapped in a layer of connective tissue called the epineurium.

Tension in the rejoined nerve may stretch the epineurium and rip the two parts from each other again.

The epineurium is made up of collagen fibers and forms a tough fibrous sheath.

In fourth-degree injury, only the epineurium remain intact.

A sheath of dense connective tissue, the epineurium surrounds the nerve.

The endoneurium, perineurium, and the epineurium are intact.

Several fascicles may be in turn bundled together with a blood supply and fatty tissue within yet another sheath, the epineurium.

The epineurium and perineurium remain intact, thus preventing the formation of stump neuroma.

In contrast, the epineurium is a tough and mechanically resistant tissue which is not easily penetrated by a needle.

The epineurium of the nerve is contiguous with the dura mater, providing extra support to the nerve.

In third-degree injury, there is a lesion of the endoneurium, but the epineurium and perineurium remain intact.

This section of connective tissue is an important factor in preventing the passing of large molecules from the epineurium into a fascicle.

More severe nerve injury like axonotmesis or neurotmesis warrant the repair of the epineurium because the connective tissue is damaged.

Initial sutures are placed on opposite sides of the joint, through the epineurium and slightly into the subepineurial neural structure to anchor the two nerves together.

The epineurium surrounds the nerve trunk (i.e. superficial epineurium).

Group fasicular repair involves suturing group fascicles in the intraneural epineurium to line up the groups of fascicles.

If axons, and their myelin sheath are damaged, but schwann cells, the endoneurium, perineurium and epineurium remain intact is called axonotmesis.

The epineurium separates the nerve fascicles, but lies outside the perineurium (i.e. interfascicular epineurium).

Axonotmesis is usually the result of a more severe crush or contusion than neurapraxia, but can also occur when the nerve is stretched (without damage to the epineurium).

Epineurial repair is a common surgical procedure to repair a nerve laceration via the epineurium, the connective tissue surrounding nerve fibers originating from the spinal cord.

The epineurium is preserved in a nerve injury in continuity by definition and the severity of the injury varies with the amount of the connective tissue preserved.

The optic nerve is ensheathed in all three meningeal layers (dura, arachnoid, and pia mater) rather than the epineurium, perineurium, and endoneurium found in peripheral nerves.