Brachial Plexus Injuries in Adults: Evaluation and Diagnostic Approach

Table 4

Neurophysiological findings in traumatic peripheral nerve injuries, in each category, respectively, according to Seddon classification.

	Neurapraxia	Axonotmesis	Neurotmesis
Conduction velocity	Usually normal	Normal/mild reduction	Absent
CMAP frequency	Normal/reduced	Reduced	Absent
SNAP frequency	Reduced	Reduced	Absent
Abnormal spontaneous potentials in EMG	Absent	Probably present	Present

Source: [8].