Movements of Thoracic and Lumbar IV Joints

Question 0

Muscles producing movements of thoracic and lumbar IV Joints extension primary movement?

Answer 0

erector spinae, multifudus, semispinalis thoracis

Question 1

Muscles producing movements of thoracic and lumbar IV Joints flexion primary movement?

Answer 1

rectus abdominis, psoas major, gravity

Question 2

Muscles producing movements of thoracic and lumbar IV Joints lateral bending primary movement?

Answer 2

Unilateral action of:
iliocostalis thoracis and lumborum, longissimus thoracis, multifudus, external and internal oblique, quadratus lumborum, rhomboids, serratus anterior

Question 3

Muscles producing movements of thoracic and lumbar IV Joints rotation primary movement?

Answer 3

unilateral action of:
rotatores, multifudus, iliocostalis, longissimus, external oblique action synchronously with opposite internal oblique, splenius thoracis

Question 4

Muscles producing movements of thoracic and lumbar IV Joints flexion limiting structures?

Answer 4

Ligaments: supraspinous, interspinous, flavum
capsules of zygapophysial (facet) joints
extensor muscles
vertebral bodies (apposition anteriorly)
anulus fibrosus (tension posteriorly)
IV disc (compression anteriorly)

Question 5

Muscles producing movements of thoracic and lumbar IV Joints extension limiting structures?

Answer 5

Ligaments: anterior longitudinal
capsules of zygapophysial joints
abdominal muscles
spinous processes (contact between adjacent processes)
anulus fibrosus (tension anteriorly)
IV discs (compression posteriorly)

Question 6

Muscles producing movements of thoracic and lumbar IV Joints lateral bending limiting strcutures?

Answer 6

ligaments: contralateral side
contralateral muscles that laterally bend trunk
contact between iliac crest and thorax
anulus fibrosus (tension of contralateral fibers)
IV disc (compression ipsilaterally)

Question 7

Muscles producing movements of thoracic and lumbar IV Joints rotation limiting structures?

Answer 7

ligaments: costovertebral
ipsilateral external oblique, contralateral internal oblique
articular facets (apposition)
anulus fibrosus