Beginner Lesser Thoracic Splanchnic Nerve Quiz

Q1. The lesser thoracic splanchnic nerve is associated primarily with which division of the autonomic nervous system?

• Parasympathetic division
• Sympathetic division
• Special sensory system
• Somatic motor system

Q2. From which structure does the lesser thoracic splanchnic nerve arise?

• Brachial plexus
• Phrenic nerve
• Vagus nerve
• Thoracic sympathetic trunk

Q3. Which thoracic sympathetic ganglia most commonly contribute to the lesser thoracic splanchnic nerve?

• T5 through T9
• T1 and T2
• T10 and T11
• L4 and L5

Q4. What type of autonomic fibers predominate in the lesser thoracic splanchnic nerve?

• Preganglionic sympathetic fibers
• Preganglionic parasympathetic fibers
• Somatic motor fibers
• Postganglionic sympathetic fibers

Q5. The lesser thoracic splanchnic nerve travels from the thorax into which region?

• Neck
• Cranial cavity
• Upper limb
• Abdomen

Q6. Which prevertebral ganglion is an important termination site for the lesser thoracic splanchnic nerve?

• Ciliary ganglion
• Aorticorenal ganglion
• Otic ganglion
• Submandibular ganglion

Q7. Which muscle separates the thoracic and abdominal portions of the lesser thoracic splanchnic nerve's course?

• Rectus abdominis
• Serratus anterior
• Diaphragm
• Pectoralis major

Q8. The lesser thoracic splanchnic nerve contributes to sympathetic innervation of which general region?

• Abdominal viscera
• Intrinsic hand muscles
• Facial muscles
• Upper limb skin only

Q9. Which nerve generally arises from higher thoracic sympathetic levels than the lesser thoracic splanchnic nerve?

• Subcostal nerve
• Greater thoracic splanchnic nerve
• Vagus nerve
• Phrenic nerve

Q10. Which statement best describes the lesser thoracic splanchnic nerve?

• A parasympathetic branch of the vagus nerve
• A sympathetic visceral nerve arising mainly from T10 and T11 and entering the abdomen
• A somatic nerve supplying intercostal muscles
• A sensory nerve confined to the thoracic skin