Peripheral Nerve Flashcards
From what nerve does the anterior interosseus branch from? What three muscles does it innervate?
Median nerve
Flexor digitorum profundus 1
Pronator quadratus
Flexor pollicis longus
What side of the humeral head does the axillary nerve wrap around?
Posterior aspect, so it is susceptible to injury during should dislocations
What peripheral nerve supplies most sensation to medial leg below the knee?
What is it a branch off of?
Where in the leg is it most likely to be compressed?
Saphenous nerve
Femoral nerve
Adductor canal
What nerve roots does the femoral nerve arise from?
Where is it relative to the peritoneum?
What structure does it pass inferior to as it enters thigh and adductor canal?
The presence of weakness where indicates damage to the femoral nerve at the abdominal portion?
L2-:4
Retroperitoneal
Inferior to inguinal ligament
Psoas weakness
What nerve roots does the lateral femoral cutaneous nerve arise from?
Where is it in reference to the anterior superior iliac spine?
Damage to it causes sensory loss where?
During what surgical procedures or positions may it be injured?
L2-L3
Medial and inferior
Anterolateral thigh but not below knee
Prone position and when harvesting iliac crest
What three muscles does the musculocutaneous nerve supply?
What is its sensory branch?
Biceps, brachialis, corabrachialis
Lateral antebrachial cutaneous nerve (sensation to lateral forearm)
Supination of the straight arm is from what nerve and muscle?
How about supination with arm flexed?
Radial nerve when straight and due to supinator muscle
When flexed from musculocutaneous nerve and brachialis
Can patients with nerve roots avulsion injury get better on their own?
No, they generally need surgery
Is it safe to remove fasicles which are normally supplying peripheral schwannomas?
Yes
What muscle does the phrenic nerve course over?
Anterior scalene
What muscles does the suprascapular nerve supply? What are their function, respectively?
Supraspinatus (first few degrees of shoulder abduction) and infraspinatus (external rotation of shoulder)
Where is an incision made for a sural nerve biopsy?
MIdline of posterior calf since sural vein is easily accessible between heads of gastrocnemius
Does the sural nerve have sensory or motor function?
What are of the leg does it affect?
Sensory
Provides sensation to lateral ankle and foot
What nerve does the tibial nerve branch from and at what location?
Sciatic nerve at posterior leg just above popliteal fossa and then continues to course inferiorly
What is hyperpathia?
When the same stimulus repeated leads to escalating pain response
What artery often compresses CN V? How about CN VII?
CN V: SCA
CN VII: AICA
What is the best test for distinguishing type I and type II CRPS?
Electrodiagnostic studies because type I occurs in absence of discernible injuries, type II occurs in presence of nerve injuries
Patients presenting with hyperreflexia and the presence of intrathecal pumps for extended periods of time should pique awareness of what possible development?
Development of catheter tip granuloma which causes compression at level of catheter tip an UMN signs
For what type of patients should the DREZ procedure be saved for?
Patients with nonmalignant pain that has been refractory to nerve procedures and not showing any signs of recovery
What surgical treatment may be used for medically refractory migraine, cluster, or hemicrania continua headaches?
Trial of occipital nerve stimulation
What is trigeminal deafferentation pain like?
Constant, burning pain, somewhat reduced in area of previous sharp, lancinating pain which usually occurs after an ablative type of procedure such as SRS
The nervus intermedius runs besides what nerve in the ear canal and is associated with what neuralgia type?
Alongside the facial nerve and associated with geniculate neuralgia
How can you tell between geniculate and trigeminal neuralgia?
The former often has DEEP ear pain
For percutaneous cordotomy at high cervical area what sensation often occurs after the electrode is placed?
A warm sensation
