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Ipsilateral disturbance of taste due to pontine haemorrhage

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Summary

A patient with haemorrhage in the right tegmentum of the pons demonstrated ipsilateral disturbance of taste on both the anterior two-thirds and posterior one-third of the tongue. The contralateral medial lemniscus was not disturbed, contrary to the early descriptions that the secondary gustatory neurons from the nucleus of the solitary tract cross and turn upwards in the pons through the contralateral medial lemniscus. This finding would accord with the concept of the pontine taste area which receives ipsilaterally the secondary gustatory neurons from the anterior pole of the nucleus of the solitary tract.

Zusammenfassung

Bei einem Patienten mit einer Blutung in der rechten Brückenhaube war homolateral eine Geschmacksstörung der ganzen entsprechenden Zungenhälfte nachweisbar. Der Lemniskus medialis auf der Gegenseite war nicht befallen. Dies steht im Gegensatz zu früheren Beschreibungen, wonach das sekundäre Geschmacksneuron vom Nucleus des Tractus solitarius hinüberkreuzt und dann in der Brücke durch den contralateralen Lemniskus medialis nach rostral verläuft. Die vorliegenden eigenen Befunde stützen die Annahme eines pontinen Geschmackszentrums, welches ipsilateral die Endigung eines sekundären gustatorischen Neurons aus dem rostralen Pol des Nucleus des Tractus solitarius empfängt.

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Nakajima, Y., Utsumi, H. & Takahashi, H. Ipsilateral disturbance of taste due to pontine haemorrhage. J Neurol 229, 133–136 (1983). https://doi.org/10.1007/BF00313454

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  • DOI: https://doi.org/10.1007/BF00313454

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