Beginner Phrenic Nerve Quiz
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This quiz contains 10 questions. Click below to begin.
Q1. Which spinal nerve roots usually contribute to the phrenic nerve?
- T1-T4
- C3-C5
- C1-C2
- C5-T1
Q2. Which cervical root usually provides the largest contribution to the phrenic nerve?
- C4
- C7
- T1
- C1
Q3. Which muscle is the principal motor target of the phrenic nerve?
- Diaphragm
- Sternocleidomastoid
- Trapezius
- Mylohyoid
Q4. On which muscle does the phrenic nerve descend in the neck?
- Posterior belly of digastric
- Anterior scalene
- Middle scalene
- Sternohyoid
Q5. Which fascial layer covers the phrenic nerve as it descends on anterior scalene?
- Prevertebral fascia
- Superficial fascia only
- Investing fascia only
- Buccopharyngeal fascia
Q6. What is the main function of the phrenic nerve?
- Motor innervation of the diaphragm
- Sensory innervation of the face
- Motor innervation of the tongue
- Motor innervation of the vocal folds
Q7. Which cervical plexus structure gives rise to the phrenic nerve?
- Sympathetic trunk only
- Posterior rami of C1-C3
- Anterior rami of C3-C5
- Accessory nerve
Q8. How many main phrenic nerves are normally present?
- Four on each side
- Two, one on each side
- Only a right phrenic nerve
- One in the midline
Q9. What may occur if one phrenic nerve is paralyzed?
- Ipsilateral hemidiaphragm weakness or paralysis
- Bilateral facial paralysis
- Loss of tongue sensation
- Paralysis of the ipsilateral vocal fold only
Q10. Pain from diaphragmatic irritation carried by the phrenic nerve may be referred to which region?
- Sole of the foot
- Lower lumbar region
- Shoulder region
- Little finger only