peripheral nerves

Question 1

basic definitionof peripheral nerves

Answer 1

anything outside of nervous systme (like sciatic nerve)

Question 2

epineurium

Answer 2

outermost covering

Question 3

epineurium is a continuation of

Answer 3

duramater and ahs vessels for nutrients

Question 4

which covering varies in size

Answer 4

epineurium

Question 5

perineurium is a continuation of

Answer 5

arachnoid mater

Question 6

what is function of perineurium

Answer 6

mechanical strength,biochemical strength and preserve iionic environment

Question 7

endoneurium continuation/extension of

Answer 7

pia mater

Question 8

function of endoneurium

Answer 8

protects motor nerve fibers

Question 9

what is the innermost layer of peripheral nerve

Answer 9

endoneurium

Question 10

what is the interstitial tissue around nerve fascicles

Answer 10

perineurium

Question 11

whats fascicle

Answer 11

small bunder/cluster of nerves

Question 12

what is a lamellar sheath that encompasses each fascicle

Answer 12

perineurium

Question 13

function of epineurium

Answer 13

cushions nerve during movement and maintians oxygen supply

Question 14

epineurium maintinas oxygen supply via the

Answer 14

epineural blood supply

Question 15

tensile force is like

Answer 15

distraction , makes it longer and narrow

Question 16

strain is due to

Answer 16

stress

Question 17

internal is

Answer 17

stress

Question 18

external is

Answer 18

strain

Question 19

what is the elastic limit of peripheral tensile forces

Answer 19

20% elongation

Question 20

end of plastic limit for peripheral nerves tensile is

Answer 20

30% elongation

Question 21

injury increases the () of a nerve

Answer 21

stiffness of a nerve

Question 22

on a graph the () the slope the () the material

Answer 22

steaper, stiffer (closer to y axis)

Question 23

straight leg raise test

Answer 23

sciatic nerve and how strong hanstrimg and lumbar mobility

Question 24

at () - () degrees you get slack in sciatic /aborization / just moving it

Answer 24

0-35 degrees

Question 25

what degrees get sciatic root has greater tensile

Answer 25

35-70

Question 26

over what degree get no further deformation of roots, it relaxes but now get meninegeal and dural pulling

Answer 26

over 70 degrees

Question 27

put you fingers on () and () when you go past 70 degrees and feel () and ()

Answer 27

L5, S2, feel s2 put pressure on ginger and back flatten out

Question 28

tourniquet compression

Answer 28

equal distribution of pressure around the nerve ex: ivf

Question 29

ballon technique (compression)

Answer 29

one sided compressive force ex: IVDs

Question 30

two types of comperssion

Answer 30

tourniquet and balloon

Question 31

what force can the body not handle

Answer 31

shear

Question 32

body can withstand

Answer 32

torniquet

Question 33

when you get a touniquet compression you also get

Answer 33

edge effect (is a shear force)

Question 34

what part of peripheranl nerve gets shear/edge

Answer 34

epineurium, peri, endo

Question 35

what keeps area open for discs?

Answer 35

osteophytes

Question 36

what can put tensile probelms on ligaments

Answer 36

poor diet, too much sugar relaxes ligements so get loose and bone hypermobile now

Question 37

piriformis syndrom is a () compression

Answer 37

ballooning by compressing sciatic

Question 38

levels of sciatic nerve

Answer 38

L4-s3 ventral rami

Question 39

well leg raise how do it and findings

Answer 39

pull healthy leg and hurts other side, show tumor, osteophyte, disc problem

Question 40

what force is most detrimental to the nerve

Answer 40

edge effect/ shear force

Question 41

peripheral neuropathy

Answer 41

involves peripheral nerve, covers multiple dermatomes areas from a plexus (like ulna)

Question 42

radiculopathy

Answer 42

involves one spinal nerve root

Question 43

things to consider to differentiate from rediculopathy and neuropathy

Answer 43

1. dermatomal vs peripheral sensory patterns (peripheral from plexus)
2. deep tendon reflexes (DTRS)
3. specific muscle testings

Question 44

sciatic nerve covers

Answer 44

posterior thigh and all of lower extermity