Anatomy Flashcards

Which ligament of the knee prevents anterior displacement of the tibia on the femur?

Answer: Anterior cruciate ligament

The anterior cruciate ligament (ACL) prevents anterior translation of the tibia relative to the femur, tested by the anterior drawer test.

The thoracic duct drains into the venous system at which location?

Answer: Left subclavian–jugular junction

The thoracic duct empties into the junction of the left subclavian vein and the left internal jugular vein.

Which muscle is the primary internal rotator of the hip?

Answer: Gluteus medius (anterior fibers)

The anterior fibers of the gluteus medius are the primary internal rotators of the hip; the posterior fibers externally rotate.

The Wrist drop seen after a Saturday night palsy is caused by injury to which nerve?

Answer: Radial nerve in the axilla

Saturday night palsy compresses the radial nerve in the axilla (e.g., against a chair back), paralyzing wrist and finger extensors and causing wrist drop.

Which foramen transmits the facial nerve (CN VII) out of the skull?

Answer: Stylomastoid foramen

The facial nerve exits the skull via the stylomastoid foramen before entering the parotid gland and branching into its terminal divisions.

Which layer of the epidermis undergoes the most mitotic activity?

Answer: Stratum basale

The stratum basale (germinativum) is the deepest epidermal layer and the primary site of keratinocyte mitosis and renewal.

The celiac trunk is the first unpaired branch of the abdominal aorta and typically divides into which three branches?

Answer: Left gastric, splenic, common hepatic arteries

The celiac trunk classically trifurcates into the left gastric artery, splenic artery, and common hepatic artery.