Thoracic and lumbar intervertebral joints Flashcards

1
Q

What muscles produce flexion?

A

Bilateral action of:
Rectus abdominis
Psoas major
Gravity

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2
Q

What muscles produce extension?

A

Bilateral action of:
Erector spinae
Multifidus
Semispinalis thoracis

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3
Q

What muscles produce lateral bending?

A
Unilateral action of:
Iliocostalis thoracis and lumborum
Longissimus thoracis
Multifidus
External and internal oblique
Quadratus lumborum
Rhomboids
Serratus anterior
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4
Q

What muscles produce rotation?

A
Unilateral action of:
Rotatores
Multifidus
Iliocostalis
Longissimus
External oblique acting synchronously with opposite internal oblique
Splenius thoracis
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