Lec 07: Peripheral Nerve Injuries Flashcards
(25 cards)
Identify the Seddon’s Classification of peripheral nerve injury being described.
Usually due to compression.
a. Neuropraxia
b. Axonotmesis
c. Neurotmesis
d. AOTA
e. NOTA
a. Neuropraxia
Identify the Seddon’s Classification of peripheral nerve injury being described.
Reversible loss of function.
a. Neuropraxia
b. Axonotmesis
c. Neurotmesis
d. AOTA
e. NOTA
a. Neuropraxia
Identify the Seddon’s Classification of peripheral nerve injury being described.
Shallow damage or death of the axon. Damage or death is from the axon to its most distal part.
a. Neuropraxia
b. Axonotmesis
c. Neurotmesis
d. AOTA
e. NOTA
b. Axonotmesis
Identify the Seddon’s Classification of peripheral nerve injury being described.
Usually caused by crush injuries.
a. Neuropraxia
b. Axonotmesis
c. Neurotmesis
d. AOTA
e. NOTA
b. Axonotmesis
Identify the Seddon’s Classification of peripheral nerve injury being described.
Honeymoon’s Palsy
a. Neuropraxia
b. Axonotmesis
c. Neurotmesis
d. AOTA
e. NOTA
a. Neuropraxia.
Wife laid down on of the husband’s arm after making love compresses the radial nerve, wound around the humerus. -> Myelin sheath damage leading to wrist drop sign
Axonal regeneration is how many mm per day?
1.5 to 2mm
Identify the Seddon’s Classification of peripheral nerve injury being described.
Total injury to the axon and connective tissue (endoneurium) with low possibility of recovery, meural sheath and nutrition compromised.
a. Neuropraxia
b. Axonotmesis
c. Neurotmesis
d. AOTA
e. NOTA
c. Neurotmesis
Identify the Seddon’s Classification of peripheral nerve injury being described.
Most severe.
a. Neuropraxia
b. Axonotmesis
c. Neurotmesis
d. AOTA
e. NOTA
c. Neurotmesis
Identify the Seddon’s Classification of peripheral nerve injury being described.
With high incidence of neuroma formation.
a. Neuropraxia
b. Axonotmesis
c. Neurotmesis
d. b & c only
e. NOTA
c. Neurotmesis
Also known as anterograde or orthograde degeneration of peripheral nerves.
Wallerian degeneration
Identify the Seddon’s Classification of peripheral nerve injury being described.
Results to failure of conduction.
a. Neuropraxia
b. Axonotmesis
c. Neurotmesis
d. b & c only
e. NOTA
d. b&c only
Identify the Seddon’s Classification of peripheral nerve injury being described.
Equivalent to the Second Degree in Sunderland’s classification
a. Neuropraxia
b. Axonotmesis
c. Neurotmesis
d. b & c only
e. NOTA
b. Axonotmesis
Identify the Seddon’s Classification of peripheral nerve injury being described.
Equivalent to the 4th Degree in Sunderland’s classification.
a. Neuropraxia
b. Axonotmesis
c. Neurotmesis
d. b & c only
e. NOTA
e. NOTA
Sunderland - Seddon
1st Degree - Neuropraxia
2nd Degree - Axonotmesis
3rd Degree - excessive scarring that hinders axon regeneration
4th Degree - Scar build-up completely blocks nerve regeneration
5th Degree - Neurotmesis
Weakness of this muscle indicates a proximal median nerve injury.
Pronator teres
Injury anywhere along the median nerve leads to weakness of this muscle.
Adductor pollicis brevis
The following muscles are innervated by the anterior interosseous nerve, EXCEPT:
a. pronator quadratus
b. flexor digitorum profundus
c. flexor pollicis longus
d. NOTA
d. NOTA
The most common peripheral nerve injury.
Carpal Tunnel Syndrome
Median nerve entrapment in the supracondylar process results in motor deficits in the following muscles, EXCEPT:
a. flexor carpi radialis
b. lumbricals
c. thenar muscles
d. flexor digitorum superficialis
e. NOTA
e. NOTA
Which nerve is entrapped if there is a positive froment’s sign.
ulnar nerve.
The most commonly impinged in Brachial Plexopathy.
C7
An upper trunk palsy involving C5 and C6 which frequently occurs as a result of traumatic birth injuries (ex. shoulder dystocia) due to compression, traction or tearing.
a. Erb-Duchenne Palsy
b. Klumpke’s Palsy
c. Meralgia Paresthetica
d. NOTA
a. Erb-Duchenne Palsy.
* Klumpke’s Palsy - A lower plexus palsy involving C8 to T1 nerve roots (median and ulnar nerve involvement) which may result into claw hand deformities.
* Meralgia Paresthetica - pure sensory deficit of lateral thigh due to compression of the lateral femoral cutaneous nerve, often by the inguinal ligament. (Calvin Klein syndrome - caused by ill-fitting pants)
In this kind of GAIT, there is lateral displacement as one makes a step; the muscle gives up leading to the waddling gait. There is weakness of the gluteus medius leading to an exaggerated “kembot” when ambulating.
Mae West Gait
Gold standard for diagnosing nerve entrapment/impingement syndromes.
EMG-NCV
The best diagnostic tool for visualizing impingement.
MRI
