Beginner Multifidus Quiz

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

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

Q2. Where is multifidus most strongly developed?

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

Q3. What is the general direction of multifidus fascicles?

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

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

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

Q5. What is a major bilateral action of multifidus?

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

Q6. What rotational action can unilateral multifidus contraction produce?

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

Q7. Which nerves innervate multifidus?

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

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

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

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

• Intertransversarii
• Rotatores breves
• Semispinalis
• Interspinales

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

• Semispinalis
• Iliocostalis
• Rotatores
• Latissimus dorsi