Reappearance of brain-stem auditory evoked potentials after surgical treatment of a brain-stem hemorrhage: contributions to the question of wave generation |
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| Affiliation: | 1. Department of Neurology, General Hospital, Treviso Italy;7. University Department of Neurosurgery, General Hospital, Treviso Italy;1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, China;2. Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA;1. Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao, Shandong 266580, PR China;2. School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, PR China;3. Safety and Environmental Protection Technology Research Institute, China National Petroleum Corporation, Beijing 102200, PR China;1. Molecular Sciences Research Center, University of Puerto Rico, San Juan, PR 00926, USA;2. CDI Laboratories, 12 W Méndez Vigo Ave. Mayagüez, PR 00680, USA;3. Department of Biology, University of Puerto Rico, Río Piedras Campus, San Juan, PR 00926, USA;4. Department of Chemistry, University of Puerto Rico, Río Piedras Campus, San Juan, PR 00925, USA;5. Department of Biochemistry, University of Puerto Rico, Medical Sciences Campus, San Juan, PR 00936-5067, USA;6. Clinical Bioreagent Center, University of Puerto Rico, San Juan, PR, 00926, USA;1. Department of Computer Science and Technology, Tongji University, Shanghai 201804, PR China;2. Department of Communication Science and Engineering, Fudan University, Shanghai 200433, PR China;3. Department of Computer Science and Technology, East China Normal University, Shanghai 200241, PR China;4. Center for Science and Technology Development of the Ministry Education, Beijing 100080, PR China;5. School of Information Science and Engineering, Central South University, Changsha, Hunan 410083, PR China;1. Chongqing Key Laboratory of Computer Network and Communications Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China;2. Shapingba branch network security detachment, Chongqing public security bureau, Chongqing 400030, China |
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| Abstract: | We report on a patient suffering a spontaneous hemorrhage primarily located in the right brain-stem; surgical correction of this led to a substantial improvement in clinical deficits. Brain-stem auditory evoked potentials (BAEPs) were recorded on postoperative days 18, 30, 55 and 205. Waves II through V were initially undetectable on stimulation of the damaged side, whereas the absence of peak V was the only abnormality seen on left-side stimulation. With the regression of the right lower mid-pontine deficits, the right waves gradually reappeared and normalized progressively. On the last recording, only a left wave V abnormality persisted. At that time, the patient had a moderate left hemisyndrome due to a circumscribed right upper pontine-midbrain lesion. Therefore, it can be suggested that the first 4 waves of BAEPs mainly originate in the ipsilateral pons, and the Vth in the contralateral higher regions. |
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