BMC Neurology

Table 1 Summary of the nerve conduction study in the acute and recovery phases

From: Fulminant Guillain-Barré syndrome showing severe pharyngeal-cervical-brachial weakness in the recovery phase: a case report

Acute phase	Motor nerves
	Nerve	Side	Distal latency (ms)	Distal amplitude (mV)	Conduction velocity (m/s)
	Median	Right	4.1	0.36	58.5
	Ulnar	Right	3	0.19	53.5
	Tibial	Right	3.3	4.5	46.7
	Sensory nerves
	Nerve	Side	Latency (ms)	Amplitude (μV)	Conduction velocity (m/s)
	Median	Right	2.5	3.4	55.6
	Ulnar	Right	2.8	2	49.3
	Sural	Right	2.8	13.9	50.7
Recovery phase	Motor nerves
	Nerve	Side	Distal latency (ms)	Distal amplitude (mV)	Conduction velocity (m/s)
	Median	Right	3.4	5.2	62.2
	Ulnar	Right	2.8	5.1	63.8
	Tibial	Right	4	22	57.5
	Sensory nerves
	Nerve	Side	Latency (ms)	Amplitude (μV)	Conduction velocity (m/s)
	Median	Right	2	22.1	68.6
	Ulnar	Right	2.5	9.5	56.9
	Sural	Right	2.9	33.9	54.7

In the acute phase, compound muscle and sensory nerve action potentials decreased from the distal portion in upper limb nerves as compared with those in lower limb nerves. In all nerves tested, distal latencies and nerve conduction velocities were normal. These findings suggested axonal damage in peripheral nerves. In the recovery phase, compound muscle action potentials in upper limb nerves persistently decreased

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