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Related Experiment Video

Updated: May 28, 2026

Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model

Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model

Published on: June 18, 2021

Brainstem hemorrhage presented as audiovestibular syndromes.

Chia-I Chou¹, Hung-Ching Lin, Kang-Chao Wu

¹Department of Otolaryngology-Head and Neck Surgery, Mackay Memorial Hospital, Taipei City, Taiwan.

American Journal of Otolaryngology

|October 4, 2011

Summary

Brainstem hemorrhage, though typically causing severe neurological issues, can rarely present solely with audiovestibular symptoms like tinnitus and vertigo. This case highlights the importance of considering central causes for such subtle presentations.

Related Experiment Videos

Last Updated: May 28, 2026

Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model

Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model

Published on: June 18, 2021

Area of Science:

Neurology
Neuroscience
Otolaryngology

Background:

Brainstem hemorrhage often leads to acute, severe neurological deficits with a poor prognosis.
Audiovestibular symptoms are an uncommon presentation for brainstem hemorrhages.

Observation:

A rare case of brainstem hemorrhage involving the right middle cerebellar peduncle and dorsal lateral pons is presented.
The patient exhibited constant nonpulsatile tinnitus and rotatory vertigo as the primary symptoms.

Findings:

The audiovestibular symptoms were the sole presenting neurologic signs.
Rotatory nystagmus was observed, suggesting a potential central nervous system origin.

Implications:

Rotatory nystagmus should be considered a central sign of neurological dysfunction until definitively proven otherwise.
Subtle or isolated audiovestibular symptoms may indicate serious underlying brainstem pathology.
This case broadens the differential diagnosis for audiovestibular disturbances, emphasizing the need for thorough neurological evaluation.