CNIM Study Guide (NTI)

CNIM Study Guide (NTI) D wave is recorded from Spinal Cord (epidural space) Asynchronous vs. Synchronous EEG patterns - Synchronous - general symmetry, or lateral symmetry: Stimulation in both left and right limb simulatneously - Asynchronous - 2 independent lateralized patterns: Stimulation is given on alternating. First left side then right side What is the posterior pathway? the dorsal column-medial lemniscus pathway (sensory pathway) What are the active and obligate peaks? (field, generators, artery) UPPER EXTREMITY SSEP - Cortical N20 (generated from the primary somatosensory cortex) - Subcortical N18 (generated from the brainstem/thalamus) - Subcortical P14 (generated from caudal medial lemniscus) - Cervical N13 ( generated from the upper cervical spine) - Peripheral N9 (generated and propagated valley under Erbs point/the brachial plexus LOWER EXTREMITY SSEP - Cortical P37 (generated from the primary somatosensory cortex) - Subcortical N34 (generated from the brainstem/thalamus) - Subcortical P31 (generated from the medulla) - Lumbar LP/N22