Local anesthetics work on which voltage gated channels?

Which of the following dermatomes may be spared in an interscalene nerve block approach to the brachial plexus?  (Which nerves are not localized?)

Match the following nerve injury with the resultant manifestation:

Which nerve provides sensory innervation to the posterior thigh and the back of the knee?

Which of the following patients would an interscalene block be contraindicated?

Which of the following nerves is responsible for knee flexion and extension? 

The posterior cord of the brachial plexus divides into two nerve segments: SELECT TWO.

Which nerve fibers transmit information related to sharp pain and temperature and rapidly conduct information.  Local anesthetics act rapidly on these same fibers. 

Your 22 year old patient is undergoing surgery for repair of a ruptured achilles tendon.  Which of the following peripheral nerve blocks would be the best choice for postoperative pain control? 

The most common cause of allergies to local anesthetics can be described as: