Intro to Neurodynamics and Mobilization of the Nervous System Flashcards
components of NS
CNS
peripheral
ANS
CNS
brain and SC
peripheral
nerves outside the brain and spinal cord
ANS
sympathetic and parasympathetic
the NS is a
continual tract
what creates mechanical stress onto the NS
a person’s trunk and limb movements
mechanical stresses can be
transferred and shared
sharing of stresses
stresses to the PNS are transmitted to the CNS
stresses to the CNS are transmitted to the PNS
the NS system is
viscoelastic and highly adaptable
what do peripheral nerves have to normally adapt to
marked changes in length of the nerves
what do nerves have to deal with
interfacing w/ different types of tissues
soft–> muscle and fascia
hard –> boney
what must nerves and the associated CT do
lengthen and slide
spinal N is how much longer in flexion
5-9 cm
how much long is the median nerve in wrist/elbow extension
20%
what protects the CNS
cranium
vertebral column
what protects the PNS
common position of peripheral nerves
run deep and on flexor side of the limbs –> exception: common peroneal N and ulnar N
NS adaptation to movement
elongation of nerve
intraneural movement
elongation of nerve
nerve can elongate a lot before it begins to be stretched
movement of spine and/or extremities do not affect these tension sites
intraneural movements
movement of the nerve relative to its own CT
CT allows traction forces to be distributed over the length of the nerve
dura
spinal dura
what does the dura form
loose sheath around the spinal cord
what does the dura do laterally
surrounds spinal nerves as they exit from the intervertebral foramen
what happens if the dura becomes adherent
excessive stress is produced where the spinal nerves exit
what does excessive stress create sxs of
pain
impaired mobility
sensory deficits
how do nerves respond to trauma
inflammatory response –> adhesion can develop –> limited mobility
what does nerve irritability occurs via
tension
friction
compressive forces
redundancy
where the sxs of nerve irritability occur
anywhere along the path of the nerve
nerve entrapment syndromes
injury can occur due to
abnormal postures
direct trauma
indirect trauma
abnormal postures –> injury
stretch
compress
tension
friction
redundancy
direct trauma –> injury
direct blow or laceration of nerve
indirect trauma –> injury
joint dislocation
fx
manipulation
surgery
extremes of motion
places excessive traction forces on the nerve
what can compression occur w/
very forceful muscle contractions
tight fascia
bony osteophytes
space occupying lesion
electrical injuries
about 1/4 of people who are electrocuted had permanent nerve injuries
what are nerves less tolerant to
compression
