DENTAL GROSS ANATOMY: Answers to Sample Questions

WEEK 3 -- September 17, 2007

1. Sensory loss in the skin overlying the mastoid process suggests injury to the:
   • A. Accessory nerve
   • B. Lesser occipital nerve
   • C. Suprascapular nerve
   • D. Transverse cervical nerve
   • E. Facial nerve
   
   
2. The anterior scalene muscle inserts on the:
   • A. Clavicle
   • B. Scapula
   • C. Manubrium Sterni
   • D. 1st rib
   • E. None of the above
   
   
3. Infiltration of anesthetic at several points along the posterior border of the sternocleidomastoid muscle will produce loss of sensation in which cutaneous regions?
   • A. Just inferior to the external ear
   • B. Over the sternocleidomastoid muscle
   • C. Over the clavicle
   • D. Over the thyroid cartilage
   • E. All of the above
   
   

   ---

   IDENTIFICATIONS
   
   1. Deltoid muscle
   2. Clavicle
   3. Infra-glottic larynx
   4. Trapezius muscle

   ---

   CLINICAL CASE
   The suspected condition is heart failure. The involved structures are superficial neck veins, specifically the external and anterior jugular veins, which are engorged due to innefficient action of the heart.