Intermediate Nipple Anatomy Quiz

Q1. Which spinal nerve level is classically associated with the nipple dermatome?

• L1
• T10
• T4
• C4

Q2. Sensory innervation of the nipple is supplied primarily by cutaneous branches of which nerves?

• Obturator nerves
• Intercostal nerves
• Sciatic nerves
• Femoral nerves

Q3. Which autonomic division primarily supplies the smooth muscle of the nipple?

• Somatic motor division through the femoral nerve
• Enteric nervous system
• Sympathetic division
• Parasympathetic division through the vagus nerve

Q4. What is the principal effect of sympathetic stimulation on nipple smooth muscle?

• Contraction of pectoralis major
• Expansion of mammary adipose tissue
• Contraction producing nipple erection
• Milk synthesis by epithelial cells

Q5. Which lymphatic network lies beneath the nipple and areola?

• Subareolar lymphatic plexus
• Lumbar plexus
• Brachial plexus
• Cardiac plexus

Q6. Most lymph from the nipple-areolar region ultimately follows the dominant breast drainage toward which lymph nodes?

• Popliteal lymph nodes
• Submental lymph nodes
• Axillary lymph nodes
• Superficial inguinal lymph nodes

Q7. Which arterial sources contribute to the blood supply of the nipple?

• Femoral and popliteal arteries only
• Internal thoracic, lateral thoracic, and intercostal arterial branches
• Radial and ulnar arteries only
• Renal and gonadal arteries only

Q8. Which statement correctly describes the openings of the mammary ductal system at the nipple?

• All mammary ducts merge into a single universal opening
• The ducts terminate within pectoralis major
• Major lactiferous ducts open individually onto the nipple surface
• The ducts open into the subareolar lymphatic plexus

Q9. Why is the nipple particularly important in the neuroendocrine control of lactation?

• The nipple directly contracts pectoralis major during feeding
• The nipple produces all milk independently of the mammary gland
• The nipple directly synthesizes pituitary hormones
• Sensory stimulation initiates neuroendocrine reflexes involved in lactation

Q10. Which statement best describes the functional relationship between the nipple and the mammary ducts?

• The nipple produces milk independently of mammary lobules
• The nipple has no anatomical connection to mammary ducts
• The nipple drains mammary secretions into the axillary vein
• The nipple provides the external openings for the major mammary ducts