Beginner Multifidus Quiz

Q1. To which intrinsic back muscle group does multifidus belong?

• Erector spinae group
• Transversospinalis group
• Extrinsic superficial back muscles
• Suboccipital group only

Q2. Where is multifidus most strongly developed?

• Plantar foot
• Anterior abdominal wall
• Lumbar region
• Forearm

Q3. What is the general direction of multifidus fascicles?

• Vertically into the skull without vertebral attachments
• Superomedially
• Inferolaterally toward the ribs only
• Horizontally into the abdominal wall

Q4. Approximately how many vertebral levels do typical multifidus fascicles span?

• Eight to twelve vertebral segments routinely
• Zero segments
• The entire vertebral column as one fascicle
• Two to four vertebral segments

Q5. What is a major bilateral action of multifidus?

• Plantarflexion of the ankle
• Depression of the mandible
• Extension and stabilization of the vertebral column
• Flexion of the elbow

Q6. What rotational action can unilateral multifidus contraction produce?

• Contralateral rotation
• Rotation of the humerus
• No rotational effect
• Ipsilateral rotation only

Q7. Which nerves innervate multifidus?

• Posterior rami of spinal nerves
• Phrenic nerves
• Vagus nerves
• Anterior rami only

Q8. Is multifidus classified as an intrinsic or extrinsic back muscle?

• Intrinsic back muscle
• Extrinsic back muscle
• Upper limb muscle
• Thoracic wall muscle only

Q9. Which transversospinalis muscle generally has fascicles longer than those of multifidus?

• Intertransversarii
• Semispinalis
• Rotatores breves
• Interspinales

Q10. Which transversospinalis muscles generally have shorter fascicles than multifidus?

• Iliocostalis
• Semispinalis
• Latissimus dorsi
• Rotatores