Abstract
Brainstem function in patients with Chiari-II malformation was evaluated by brainstem auditory-evoked potentials (BAEPs). All cases had associated hydrocephalus, some of which were shunted. The effect of the shunting operation on the wave forms was examined as well as the age-wave relationships. Although the shunting operation resulted in shortened brainstem conduction time, the overall postshunt responses were still far from normal. Another significant finding was that whereas there were remarkable abnormalities in recorded wave-forms in cases younger than 8 years, normal or almost normal responses were obtained in all cases older than 8. BAEP abnormalities could not be correlated with the severity of meningomyelocele, nor was the predictive value of response in assessing potential risk of symptomatic Chiari malformation established.
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Chiari H (1985) Über Veränderungen des Kleinhirns, des Pons und der Medulla oblongata infolge von kongenitaler Hydrocephalie des Großhirns. Denkschr Akad Wiss (Wien) 63:71–116
Faria MA Jr, Spector RH, Tindall GT (1980) Downbeat nystagmus as the salient manifestation of the Arnold-Chiari malformation. Surg Neurol 13:333–336
Foltz EL, Blanks JP, McPherson DL (1987) Hydrocephalus. Increased intracranial pressure and brainstem auditory evoked responses in hydrocephalic rabbit. Neurosurgery 20:221–217
Hashimoto I, Ishiyama Y, Yoshimoto T, Nemoto S (1981) Brainstem auditory evoked potentials recorded directly from brainstem and thalamus. Brain 104:841–859
Holliday PO, III, Pillsbury D, Kelly DL, Dillard, JR (1985) Brain stem auditory evoked potentials in Arnold-Chiari malformations: possible prognostic value and changes with surgical decompression. Neurosurgery 16:48–53
Nishimoto H, Kagawa Y, Maeda K, Tsukiyama T, Tubokawa T (1986) Evaluation of auditory brainstem response in children with myelomeningocele. Child's Brain Nerve (Jpn) 11:407–414
Peach B (1965) Arnold-Chiari malformation: anatomic features of 20 cases. Arch Neurol 12:613–621
Stone JL, Bouffard A, Marris R, Hovsepian W, Mayers HL (1983) Clinical and electrophysiologic recovery in a Arnold-Chiari malformation. Surg Neurol 20:313–317
Weston PF, Manson JI, Abbott KJ (1986) Auditory brainstem-evoked response in childhood brainstem glioma. Child's Nerv Syst 2:301–305
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Mori, K., Uchida, Y., Nishimura, T. et al. Brainstem auditory evoked potentials in Chiari-II malformation. Child's Nerv Syst 4, 154–157 (1988). https://doi.org/10.1007/BF00270907
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DOI: https://doi.org/10.1007/BF00270907