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Peripheral nerve: Investments

This cross section of a peripheral nerve is stained with the Masson stain to reveal its investing layers. Individual axons and their sheaths are surrounded by an endoneurium. Groups of axons form a fascicle enclosed by a perineurium. This peripheral nerve, composed of a single fascicle, retains only a thin, fragmented rim of epineurium around its periphery. 400x

Axons <p>This cross section of a peripheral nerve is stained with the Masson stain to reveal its investing layers. Individual axons and their sheaths are surrounded by an endoneurium. Groups of axons form a fascicle enclosed by a perineurium. This peripheral nerve, composed of a single fascicle, retains only a thin, fragmented rim of epineurium around its periphery. 400x</p>

Axons

This cross section of a peripheral nerve is stained with the Masson stain to reveal its investing layers. Individual axons and their sheaths are surrounded by an endoneurium. Groups of axons form a fascicle enclosed by a perineurium. This peripheral nerve, composed of a single fascicle, retains only a thin, fragmented rim of epineurium around its periphery. 400x

Myelin sheaths <p>This cross section of a peripheral nerve is stained with the Masson stain to reveal its investing layers. Individual axons and their sheaths are surrounded by an endoneurium. Groups of axons form a fascicle enclosed by a perineurium. This peripheral nerve, composed of a single fascicle, retains only a thin, fragmented rim of epineurium around its periphery. 400x</p>

Myelin sheaths

This cross section of a peripheral nerve is stained with the Masson stain to reveal its investing layers. Individual axons and their sheaths are surrounded by an endoneurium. Groups of axons form a fascicle enclosed by a perineurium. This peripheral nerve, composed of a single fascicle, retains only a thin, fragmented rim of epineurium around its periphery. 400x

Endoneurium > <p>The endoneurium, stained green with this procedure, surrounds individual axons and consists of loose connective tissue.</p>

Endoneurium >

The endoneurium, stained green with this procedure, surrounds individual axons and consists of loose connective tissue.

Perineurium <p>This cross section of a peripheral nerve is stained with the Masson stain to reveal its investing layers. Individual axons and their sheaths are surrounded by an endoneurium. Groups of axons form a fascicle enclosed by a perineurium. This peripheral nerve, composed of a single fascicle, retains only a thin, fragmented rim of epineurium around its periphery. 400x</p>

Perineurium

This cross section of a peripheral nerve is stained with the Masson stain to reveal its investing layers. Individual axons and their sheaths are surrounded by an endoneurium. Groups of axons form a fascicle enclosed by a perineurium. This peripheral nerve, composed of a single fascicle, retains only a thin, fragmented rim of epineurium around its periphery. 400x

Epineurium <p>This cross section of a peripheral nerve is stained with the Masson stain to reveal its investing layers. Individual axons and their sheaths are surrounded by an endoneurium. Groups of axons form a fascicle enclosed by a perineurium. This peripheral nerve, composed of a single fascicle, retains only a thin, fragmented rim of epineurium around its periphery. 400x</p>

Epineurium

This cross section of a peripheral nerve is stained with the Masson stain to reveal its investing layers. Individual axons and their sheaths are surrounded by an endoneurium. Groups of axons form a fascicle enclosed by a perineurium. This peripheral nerve, composed of a single fascicle, retains only a thin, fragmented rim of epineurium around its periphery. 400x

Main Slide Axons Myelin sheaths Endoneurium >Perineurium Epineurium