In a median somatosensory evoked potential, what generates an N9 wave form?
A)Brachial plexus
B)Dorsal cervical roots
C)Rostral cervical cord
D)Primary sensory cortex

Question

Quizplus · Accepted Answer

N9 potential arises from brachial plexus.
In radiculopathy and avulsion of posterior and anterior roots of brachial plexus, the N9 potential is not affected, whereas after one week the N9 becomes unrecordable due to the retrograde Wallerian degeneration.
Dorsal cervical roots produce N11 waveform.
Rostral cervical cord produces N13 wave form.
Primary sensory cortex produces N20 wave form.

In a Median Somatosensory Evoked Potential, What Generates an N9