Questions and Answers
What is the definition of 1st degree peripheral nerve injury?
What does 2nd degree peripheral nerve injury mean?
What describes a 3rd degree peripheral nerve injury?
How is a 4th degree peripheral nerve injury characterized?
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What does 5th degree peripheral nerve injury represent?
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What is the Seddon name for 1st degree nerve injury?
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What is the Seddon name for 2nd-4th degree nerve injury?
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What is the Seddon name for 5th degree nerve injury?
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Study Notes
Peripheral Nerve Injury Classification
- Five degrees of nerve injury classification exist, each representing varying levels of damage.
1st Degree Nerve Injury (Neurapraxia)
- Characterized by local myelin damage, typically resulting from compression.
- Functionally intact nerve fibers; recovery is usually rapid and complete.
2nd Degree Nerve Injury (Axonotmesis)
- Involves the severing of the axon while the endoneurium remains intact.
- Potential for recovery through regeneration of the axon.
3rd Degree Nerve Injury
- Features both axonal and endoneurial tube discontinuity, but perineurium and fasciculi stay intact.
- Regeneration is challenging but possible; functional recovery may be hindered.
4th Degree Nerve Injury
- Loss encompasses axon, endoneurium, perineurium, and fasciculi, while the epineurium remains intact.
- Severe complications arise for recovery; surgical intervention may be required.
5th Degree Nerve Injury (Neurotmesis)
- Represents complete disruption of the nerve trunk.
- Typically leads to significant functional loss, and surgical repair is necessary for potential recovery.
Terminology
- Neurapraxia: Seddon term for 1st-degree injuries, indicating temporary loss of function without anatomical disruption.
- Axonotmesis: Refers collectively to 2nd through 4th degree injuries according to Seddon's classification.
- Neurotmesis: Seddon's term for 5th-degree injury, indicating the most severe form with total loss of nerve continuity.
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Description
Test your knowledge on the classification of peripheral nerve injuries with these flashcards. Each card presents a degree of injury along with a concise definition, helping you understand local myelin damage to complete loss structures. Perfect for students and professionals in neuroscience and medicine.