Regional Flashcards
What does the lateral cord give off and terminate as?
Gives off the lateral branch of the median nerve and terminates as the musculocutaneous nerve
What does the medial cord give off and terminate as?
Gives off the medial branch of the median nerve and terminates as the ulnar nerve
What does the posterior cord give off and terminate as?
Gives off the axillary nerve and terminates as the radial nerve
What are the three major nerves from the lumbar plexus that contribute to the lower limb?
- Femoral (L2–4)
- Lateral femoral cutaneous (L2–3)
- Obturator (L2–4)
From which spinal levels does the sacral plexus arise?
L4 to L5 and S1 to S4
Which portions of the sciatic nerve supply the posterior thigh and most of the leg and foot?
Tibial and peroneal portions
What does the posterior femoral cutaneous nerve provide, and where does it travel?
Provides sensory innervation to the posterior thigh; travels with the sciatic nerve around the piriformis muscle
What does the femoral nerve innervate?
Main hip flexors and knee extensors, and provides sensory innervation of the hip and thigh
What is the most medial branch of the femoral nerve?
Saphenous nerve
What does the saphenous nerve innervate?
Skin over the medial leg and the ankle joint
From where does the sciatic nerve originate?
Lumbosacral trunk
What nerve roots compose the sciatic nerve?
L4 to L5 and S1 to S3
What does the sciatic nerve provide sensory innervation to?
Posterior knee, entire leg, ankle, and foot, except for the medial leg and ankle
Into which nerves does the sciatic nerve divide?
Tibial and common peroneal nerves
Where does the sciatic nerve divide?
Within or just proximal to the popliteal fossa
Interscalene blocks are not appropriate for what surgeries
at or distal to the elbow.
A properly performed ____________ block almost invariably blocks the ipsilateral phrenic nerve
interscalene
Bilateral ____________ blocks are absolutely contraindicated
interscalene
what is horner syndrome and what causes it
- myosis, ptosis, anhidrosis
- frequently results from proximal tracking of local anesthetic and blockade of sympathetic fibers to the cervicothoracic ganglion.
The brachial plexus passes between the anterior and middle scalene muscles at the level of ____________
the cricoid cartilage, or C6
Nearly half of patients undergoing ____________ block will experience ipsilateral phrenic nerve palsy
supraclavicular
