Thoracic and lumbar intervertebral joints Flashcards
1
Q
What muscles produce flexion?
A
Bilateral action of:
Rectus abdominis
Psoas major
Gravity
2
Q
What muscles produce extension?
A
Bilateral action of:
Erector spinae
Multifidus
Semispinalis thoracis
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
4
Q
What muscles produce rotation?
A
Unilateral action of: Rotatores Multifidus Iliocostalis Longissimus External oblique acting synchronously with opposite internal oblique Splenius thoracis