Classifi cati on
Peripheral nerve
CNS is an abbreviati on for the cen-
tral nervous system.
PNS is an abbreviati on for the pe-
ripheral nervous system.
A peripheral nerve does not contain
any neuronal bodies (perikarya).
The nerve fi bres travelling in a pe-
ripheral nerve are arranged in
a wavy patt ern. This prevents them
from being harmed when they are
stretched during limb movements.
1 Nerve (nervus)
– the peripheral nerve is a bundle of axons
surrounded by fi brous ti ssue and supplied
by small vessels called the vasa nervorum
•
1.1 Epineurium – a sheath of fi brous ti ssue
covering a peripheral nerve
– emits septa into the nerve, dividing the fascicles
•
2 Fascicle (fasciculus) – a bundle of axons (nerve fi bres)
•
2.1 Perineurium – a fi brous sheath covering one fascicle
•
3 Types of nerve fi bres
3.1 Axons of alpha motor neurones
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