BCSE Anatomy 3

Question 1

A patient cannot dorsiflex or evert the foot after a fibular neck fracture. Which nerve is injured?

Accepted Answer

Common fibular (peroneal) nerve

Answer

The common fibular nerve winds around the fibular neck and innervates muscles responsible for dorsiflexion and eversion; its injury causes foot drop.

Question 2

Which coronary artery most commonly supplies the sinoatrial (SA) node?

Accepted Answer

Right coronary artery

Answer

In approximately 60% of individuals the SA nodal artery is a branch of the right coronary artery.

Question 3

The femoral triangle contains all of the following EXCEPT:

Accepted Answer

Obturator nerve

Answer

The femoral triangle contains the femoral nerve, artery, and vein (lateral to medial: nerve, artery, vein); the obturator nerve exits through the obturator foramen medially.

Question 4

Which muscle forms the floor of the anatomical snuffbox?

Accepted Answer

Scaphoid bone

Answer

The scaphoid bone (and trapezium) forms the floor of the anatomical snuffbox, and tenderness there after a fall suggests a scaphoid fracture.

Question 5

Which structure is at greatest risk when the long thoracic nerve is damaged?

Accepted Answer

Serratus anterior

Answer

The long thoracic nerve innervates the serratus anterior; its damage causes winging of the scapula because the muscle can no longer hold the scapula against the thoracic wall.

BCSE - Basic and Clinical Sciences Examination Practice Test

BCSE - Basic and Clinical Sciences Examination Practice Test

BCSE Anatomy 3