MA II: Thoracic and Lumbar

Question 1

MA II: Thoracic and Lumbar

thoracic spine kinematics

Answer 1

• 30-40° flexion, 20-25° deg extension
• 30° horizontal (axial) rotation (ipsilateral joint approximation)
• 25° lateral flexion (side bending)

Question 2

MA II: Thoracic and Lumbar

in the thoracic region, vertebral articular facets are oriented towards the

Answer 2

frontal plane

Question 3

MA II: Thoracic and Lumbar

in the lumbar region, facets surfaces are oriented towards the

Answer 3

sagittal plane

except L5-S1: facets frontal plane orientation

Question 4

MA II: Thoracic and Lumbar

lumbar spine kinematics

Answer 4

• 0-50° flexion, 0-15° extension
• 0-5° rotation (R rotation opens R facets)
• 0-20° side bending

Question 5

MA II: Thoracic and Lumbar

lumbopelvic rhythm during flexion

Answer 5

• Bending forward: 40° lumbar flexion, 70° (hip) pelvic on femoral flexion
• Too much lumbar flexion → limited hamstrings and hip flexion
• Limited lumbar flexion → greater mobility is required at the hip joint

Question 6

MA II: Thoracic and Lumbar

lumbopelvic rhythm during extension

Answer 6

1. Initiated by extension hip joints
2. Followed extension lumbar spine

Question 7

MA II: Thoracic and Lumbar

anterior and posterior pelvic tilt in sitting (muscles)

Answer 7

• Anterior tilt pelvis caused hip flexor and back extensor muscles
• Posterior pelvic tilt is caused by abdominal and hip extensor muscles