Lee E K, Seyal M
Department of Neurology, University of California, Davis Medical Center, Sacramento, USA.
J Clin Neurophysiol. 1998 May;15(3):227-34. doi: 10.1097/00004691-199805000-00006.
Somatosensory evoked potentials (SEPs) are most commonly obtained after stimulation of the median nerve and the posterior tibial nerve. SEPs reflect conduction of the afferent volley along the peripheral nerve, dorsal columns, and medial lemniscal pathways to the primary somatosensory cortex. Short-latency SEPs are recorded over the spine and scalp. After posterior tibial nerve stimulation, the following waveforms are recorded: N22, W3, the dorsal column volley, N29, P31, N34, and P37. After median nerve stimulation, the brachial plexus volley, dorsal column volley (N11), N13, P14, N18, N20, and P22 potentials are recorded. We discuss the current state of knowledge about the generators of these SEPs. Such information is crucial for proper interpretation of SEP abnormalities.
体感诱发电位（SEPs）最常在刺激正中神经和胫后神经后获得。SEPs反映了传入冲动沿周围神经、背柱和内侧丘系传导至初级体感皮层的过程。短潜伏期SEPs在脊柱和头皮上记录。刺激胫后神经后，记录到以下波形：N22、W3、背柱冲动、N29、P31、N34和P37。刺激正中神经后，记录到臂丛冲动、背柱冲动（N11）、N13、P14、N18、N20和P22电位。我们讨论了关于这些SEPs发生器的当前知识状态。此类信息对于正确解释SEP异常至关重要。
