Nerve Cross Section

The radial nerve is a nerve in the human body that supplies the posterior portion of the upper limb.
Nerve cross section. These cross sections of peripheral nerves contain unmyelinated axons. Nerve cross section structure in this image you will find nerve cross section nerve fibers fascicle endoneurium blood vessel perineurium epineurium unmyelinated nerve fiber myelinated nerve fiber spine nerve in nerve cross section structure. Myelinated nerve with endoneurium and perineurium cross section.
These cross sections of peripheral nerves contain unmyelinated axons. Fascicle of nerve axons fibers individual axons fibers endoneurium. A small bundle of nerve fibers enclosed by the perineurium.
It originates from the brachial plexus carrying fibers from the ventral roots. This is a transverse section through a nerve. Between the axons you will see delicate connective tissue and an occasional fibroblast which constitute the endoneurium.
At the periphery of the fascicle observe the perineurium made up of several layers of flattened cells. The 40x image shows a cross section through four fascicles f that are part of a nerve. A layer of connective tissue called the perineurium pn surrounds each fascicle.
Notice the connective tissue epineurium surrounding the large bundle of darkly staining myelinated neurons. An illustration of a cross section of a nerve highlighting the epineurium and perineurium. Obtain a slide of a peripheral nerve in long section and prepare to examine it with the scanning objective lens.
Each nerve is surrounded by a distinct perineurium. It is a highly specialized layer that acts as a barrier and protects the nerve from the environment. Now that you ve studied a peripheral nerve in cross section its time to study the nerve in long section.