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Flashcards in lumbar Deck (26)
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1

most important charc. of LS is that it can bear huge loads created by ____, interact w/ forces generated by ___ and other actv involving powerful musc actions

body weight
lifting

2

lumbar spine is largely responsible for ___ mobility

trunk

3

facets lie primarily in the __ plane, limits rotational flex and allows for greater mobility in flex/ext

sagittal

4

developmental abnormality where one facet faces ___ and the other faces ___ (L5-S1 most, then L4-5)

sagittally
coronally

5

developmental abnormality where one facet faces ___ and the other faces ___ (L5-S1 most, then L4-5)

sagittally
coronally

6

INF articular processes are ____ and AIL, while SUP articular processes are ___ and PSM

convex
concave

7

the spatial alignment of the __ __ determines, to a large extent, though not completely, the characteristic kinematics of the different regions of the spine

facet joints

8

facet config limits ___ flexibility and allows for ___ mobility in flex/ext

rotational
greater

9

L1-L4 facets have ___ orientation and limit __ rotation (theta Y)
L5-S1 facets have ___ orientation and limit post/anterior __

sagittal
axial
coronal
shear

10

__% of flex/ext occurs in lumbar spine, with 2x more flexion than extension

75

11

lateral bending in the LS is coupled with ___ rotation, and SP moves to IPSILAT side & VV, though lumbar rotation is quite limited due to sagittal facets

axial

12

lat bend is ctrl mainly by eccentric activity of ___ which inserts post to the normal axis of motion
-normal muscl actv leads to SP rot twd side of flex

quadratus lumborum

13

-nucleus of the LS IVD is located ____, and the IVD has a height to body ratio of __
-disc has greater resistance to axial compressive forces

posteriorly
1:3

14

-lat bend is ctrl mainly by eccentric activity of ___ which inserts post to the normal axis of motion

-normal muscl actv leads to SP rot twd side of flex

quadratus lumborum (is major stabilizer of the LS)

15

-nucleus of the LS IVD is located ____, and the IVD has a height to body ratio of __
-disc has greater resistance to axial compressive forces

posteriorly
1:3

16

L SC contains _____ proximally and the ____ distally

conus medularis
cauda equina

17

while the SC ends at L2, the nerve roots continue down the SC as the __ __, & the CNS is tethered to the coccyx by the ____ ____

cauda equina
filum terminale

18

___ lig defines ROM, stabilizing dural sac w/i foramen

hoffman

19

NRs exit dura slightly above the ___ ___, causing their course to be more oblique

foraminal opening

20

normal lumbar lordosis should be __-__ deg, and the apex of the curve is the ___ disc

20-60 degrees
L3-4

21

the sacral base angle increases with an ___ pelvic tilt, causing an increased lordosis, more weight bearing on the ___

anterior
facets

22

the sacral base angle decreases with a ___ pelvic tilt, decreasing lordosis, placing more weight bearing on the ___, therefore decreases spines ability to absorb AXIAL COMPRESSION forces

posterior
disc

23

ALL/PLL restricts excessive ____ and lubodorsal fascia acts like a large ___ ___

flex/ext
extensor retinaculum

24

-IS lig controls vertebral ___
-SS provides resistance against excessive fwd ____
-facet capsule restricts jt ___ and distraction of facet surfaces during axial rot

rotation
flexion
flexion

25

#1 cause of lumbar pain

poor lifting

26

___ damage marks the beginning of the end --mcgill

ligament