Beginner Multifidus Quiz

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

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

Q2. Where is multifidus most strongly developed?

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

Q3. What is the general direction of multifidus fascicles?

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

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

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

Q5. What is a major bilateral action of multifidus?

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

Q6. What rotational action can unilateral multifidus contraction produce?

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

Q7. Which nerves innervate multifidus?

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

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

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

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

• Interspinales
• Intertransversarii
• Semispinalis
• Rotatores breves

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

• Rotatores
• Semispinalis
• Latissimus dorsi
• Iliocostalis