Reversible Functional Damage of VIIIth Cranial Nerve in Arachnopathia Pontocerebellaris
Functional damage to the acoustic nerve in arachnopathia pontocerebellaris is not necessarily irreversible in all cases. In the case of postarachnitic strangulation where only circumscript myelin sheath damage is present in the sense of a neurapraxia, functional integrety can be achieved with surgical decompression of the nerve. With the aid of various neuro-otological examination methods such as cisternoscopy, electrocochleography, and brain stem audiometry, we are now able to exactly differentiate and diagnose arachnopathia from an expansive process in the pontine angle (i.e. acoustic neurinoma) as well as reversible postarachnitic neuropraxia of the acoustic nerve from an irreversible nerve damage such as axonotmesis and neurotmesis (Ehrenberger et al., 1977).
KeywordsAcoustic Nerve Posterior Cranial Fossa Pure Tone Audiogram Binaural Hearing Acoustic Neurinoma
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- Aran JM (1971) L’electrocochleogramme. I. Principe et technique. Les Cahiers de la Compagne Française d’Audiologie, Nr. 12, ParisGoogle Scholar
- Ehrenberger K, Innitzer J, Koos W (1977) Indication for operation in cases of arachnitic ad-hesions of the cerebello-pontine angle. Rev Laryngol Otol Rhinol (Bord) 98: 437–441Google Scholar
- Spoendlin H (1971) Degeneration behaviour of the cochlear nerve. Arch Otorhinolaryngol (NY) 200: 275–283Google Scholar