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Kinesiology Term 1 > Lumbar Spine > Flashcards

Lumbar Spine Flashcards

1
Q

Lumbar Spine

A

Lordotic curve
L1-L5 vertebrae
Intervertebral discs
Larger vertebral bodies compared to CS and TS
Articulates with sacrum

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2
Q

Function of the LS

A

primary goals of the lumbar region are to augment mobility at the hip joints to increase total mobility of the trunk and to effectively absorb and adjust body weight forces from head, arms, and trunk above and ground reaction forces below in weightbearing

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3
Q

LS Vertebral Body

A

Massive
Transverse diameter > A-P diameter and > height of the body
Support great compressive loads by body weight, ground reaction forces and muscle contraction

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4
Q

LS Pedicles

A

Short and thick
Face posterolaterally

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5
Q

LS Laminae

A

Short and broad

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6
Q

LS facets

A

Inferior facets of the SUPERIOR vertebrae:
inferior, anterior, lateral

Superior facets of the INFERIOR vertebrae:
superior, posterior, medial

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7
Q

L1-4 Facet Orientation

A

Biconcave, predominantly favors sagittal plane

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8
Q

L5-S1 Facet Orientation

A

Shifts towards frontal plane more

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9
Q

Superior facets - Mammillary processes

A

Small bumps posterior to edges of superior facets

Serve as attachment sites for the multifidus and medial intertransverse muscles

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10
Q

Inferior facets

A

Vertical and convex
Face slightly anteriorly and laterally

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11
Q

LS Transverse processes

A

Long and slender and extends horizontally

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12
Q

LS Spinous processes

A

Broad, thick, rectangular shaped, extends horizontally

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13
Q

LS vertebral foramen

A

Triangular and >TS, but <CS

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14
Q

Atypical LS vertebra

A

L5is a transitional vertebra
Body is more wedge shaped
SP is shorter
Inferior facets oriented more anteriorly to articulate with posteriorly-facing sacral facets

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15
Q

Lumbosacral articulation

A

L5 and S1; forms and angle with the horizontal plane
“lumbosacral angle”

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16
Q

Intervertebral discs

A

Collagen fibers of the annulus fibrosus are arranged in sheets -lamellae
Able to resist tensile forces in all directions
Largest
Concave posteriorly

17
Q

Interbody Joints

A

capable of translations and tilts in all directions

18
Q

Zygapophyseal Joints

A

Synovial joints
Fibroadipose meniscoid structures
Joint capsule lax>TS; taut>CS
Posterior capsule subject to compressive and tensile forces

19
Q

Supraspinous ligament

A

More developed in the upper lumbar

20
Q

Ligamentum flavum

A

Thickens in the lumbar region

21
Q

What replaces the intertransverse ligaments?

A

iliolumbar ligament

22
Q

Supraspinous ligament

A

Blends with the thoracolumbar fascia

23
Q

Posterior long. ligament

A

thin ribbon

24
Q

Anterior long. ligament

A

strong and well developed

25
Q

Iliolumbar ligament

A

Consists of 2 bands running from L5 TP to the iliac tuberosity
Strong
Stabilize L5 vertebra
Prevent ant. displacement
Resist flexion, extension, axial rotation, and lateral bending of L5 on S1

26
Q

Thoracolumbar fascia

A

3 layers:
Posterior: large, thick, and fibrous
Middle: Posterior becomes the middle layer as it travels medially along the anterior surface of the erector spinae and attaches back to the transverse processes and intertransverse ligaments of the lumbar spine
Anterior: derived from the fascia of the quadratus lumborum muscle, where it joins the middle layer, inserts into the transverse processes of the lumbar spine, and blends with the intertransverse ligaments

27
Q

Osteokinematics

A

Flexion/Extension
Lateral flexion
Rotation

28
Q

Which motion is favored by the lumbar zygapophyseal facets?

A

flexion and extension because of the predominant sagittal plane orientation

greatest amount takes place in the lumbosacral joint (L5-S1)

29
Q

Lateral flexion

A

Most free in the upper lumbar region and is less in the lower region

30
Q

Flexion Arthrokinematics

A

The vertebral body tilts and slides anteriorly while the inferior facets slide upwardly on the facets below

Both facets - up and forward (upslide)

31
Q

Extension Arthrokinematics

A

the vertebral body tilts and slides posteriorly while the inferior facets slide downwardly on the facets below

Both facets - down and back (downslide)

32
Q

Lateral flexion Arthrokinematics

A

The vertebral body tilts and slides to the ipsilateral side while the contralateral inferior facet slides upward and the ipsilateral inferior facet slides downward on the facets below

Ipsilateral: down and back
Contralateral: up and forward

33
Q

Rotation Arthrokinematics

A

the vertebral body tilts and slides ipsilateral while the ipsilateral inferior facet joint distracts (opens) and the contralateral inferior facet joint compresses

Ipsilateral: down and back
Contralateral: up and forward

Kinesiology Term 1 (16 decks)

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