lumbar Spine Flashcards

1
Q

Lumbar vertebrae 1-4

A

Facets in SAGITTAL plane
More FLEX/EXT
Less Rotation

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2
Q

L5-S1

A

More in Frontal plane
Prevents anterior translation of L5 on S1
Allows more Rotation

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3
Q

The more the facet joint is oriented in the frontal plane, the more it resists…

A

SAGITTAL plane motion, but less control of transverse plane

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4
Q

Nucleus pulposus

A

70-90% water, good for shock absorption, avascular, no innervation

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5
Q

Annulus fibrosis

A

Neural innervation.
Resists compression
Less shearing

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6
Q

What absorbs force from nucleus pulposus

A

End plates

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7
Q

Effects to intervertebral discs with Age

A

Decreased H2O in nucleus pulposus

Increased collagen content

Increased stress on annulus fibrosis (thinnest posteriorly)

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8
Q

With Flexion of intervertebral disc

A

Anterior AF compressed, NP compressed into the AF causing stretch

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9
Q

Intervertebral is more vulnerable to injury with which movements?

A

Flexion and Rotation

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10
Q

How does the pelvis and hips increase lumbar mobility?

A

Through pelvic tilting

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11
Q

8-13 degrees of flexion are limited by

A

Posterior ligaments and Disk facets joint

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12
Q

1-5 degrees of extension are limited by

A

Bony contact

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13
Q

1-2 degrees of rotation are limited by

A

Facet joints and AF tension

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14
Q

Limbo-pelvic movement

A

Anterior tilt and flex occurs in both simultaneously

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15
Q

Lumbo pelvic Ext

A

Posterior pelvic tilt leads to lumbar extension until pelvis neutral then further lumbar ext to neutral

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16
Q

Muscles of lumbar spine

A

Abdominal Wall

Multifidus

17
Q

(Pelvis) Sacrum

A

5 fused vertebrae in triangular shape, SI joints between L/R iliac bones and articular surfaces on sacrum

18
Q

(Pelvis) describe the ligaments

A

Very strong with very little movement

19
Q

(Pelvis) transmits forces from LE where? And trunk where?

A

LE-upward

Trunk- downward

20
Q

Thoracolumbar fascia

A

Fasical connections with muscle (abdominals, gluts, lats, erector, Biceps) and bone to stabilize trunk with UE and LE movement