Nerve Injury Classification and Prognosis

The video tutorial explains the classification of nerve injuries using the Sunderland and Seddon systems. It covers five grades of nerve injury, detailing the pathology, electrodiagnostic findings, and prognosis for each grade. Grade 1 involves demyelination with excellent recovery, while Grade 2 includes axon loss with good prognosis. Grade 3 involves moderate injury with endoneurium involvement, and Grades 4 and 5 are severe, affecting the perineurium and epineurium, with limited recovery potential.

What are the two main classifications of nerve injury discussed in the video?

• Sunderland and Seddon

• Sunderland and Smith

• Smith and Johnson

• Seddon and Johnson

Which grade of nerve injury in Sunderland classification corresponds to neuropraxia?

• Grade 4

• Grade 1

• Grade 3

• Grade 2

What is the prognosis for a Grade 1 nerve injury?

• Fair up to one year

• Good up to six months

• Poor prognosis

• Excellent up to three months

What is the main characteristic of a Grade 2 nerve injury?

• Demyelination and axon loss

• Only demyelination

• Complete nerve transection

• No axon loss

Which factor limits the prognosis of a Grade 2 nerve injury?

• Severity of the injury

• Age of the patient

• Type of treatment

• Time-distance factor

What additional structure is involved in a Grade 3 nerve injury?

• Endoneurium

• Epineurium

• Perineurium

• Myelin sheath

What is the prognosis for a Grade 3 nerve injury?

• Good to fair

• Excellent

• Fair to poor

• Poor

Which grade of nerve injury involves the perineurium?

• Grade 5

• Grade 2

• Grade 1

• Grade 4

What is the prognosis for a Grade 5 nerve injury?

• Good

• Excellent

• Fair

• Nil