Involvement of the human ventrolateral thalamus in olfaction.

Journal of Neurology
S ZobelM Kronenbuerger

Abstract

It is widely assumed that the thalamus is not involved in olfaction. The ventrolateral thalamus is, however, closely connected to the contralateral cerebellum, which is involved in the sense of smell based on findings from functional imaging studies and findings of olfactory deficits in patients with cerebellar disease. We hypothesized that olfactory deficits following lesions of the ventrolateral thalamus may be similar to olfactory deficits following cerebellar lesions. Fifteen patients with a focal thalamic lesion involving the ventrolateral thalamus were examined and compared to 15 patients with a focal cerebellar lesion and 15 healthy controls. A detailed olfactory test ("Sniffin' Sticks") was used to assess different olfactory functions separately for each nostril. In the group of patients with a lesion of the ventrolateral thalamus, an impairment of the odor threshold was found at the ipsilateral nostril, consistent with the unilateral orientation of the olfactory system in the telencephalon. In the group of patients with a cerebellar lesion, an olfactory deficit at the contralesional nostril emerged. In controls, no significant side difference was found. The involvement of the ventrolateral thalamus in olfaction is comp...Continue Reading

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Citations

Jan 28, 2014·PloS One·Hao JiaGopikrishna Deshpande
Dec 17, 2014·Journal of the Neurological Sciences·Paula M JanssenPeter J Koehler
Jun 7, 2018·PloS One·Martin KronenbuergerIrene Neuner
May 19, 2017·Nature Reviews. Neuroscience·Akiko SatohLeonard Guarente
Feb 9, 2012·Journal of the American Veterinary Medical Association·Vincent J GuerinAudrey F Petite
Jul 5, 2019·Chemical Senses·Albert Wabnegger, Anne Schienle
Feb 18, 2020·Journal of Neural Transmission·Thorsten HerrMartin Kronenbuerger
Oct 18, 2020·Brain Sciences·Thorsten HerrMartin Kronenbuerger
Jun 30, 2021·Journal of Neural Transmission·Julie GamainMartin Kronenbuerger

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