Asymmetric Innervation of the Habenula in Zebrafish
Michael Hendricks and Suresh Jesuthasan
Hendricks M, Jesuthasan S. 2007. Asymmetric innervation of the habenula in zebrafish. J Comp Neurol. 502:611–619.
In the above-referenced article, dorso-rostral neurons that innervate the right habenula are suggested to reside in the
pallium. This is an error. The neurons are in the olfactory bulb, which is initially in a dorsal position, but rotates ventrally
Figure. Evidence for their identity as olfactory bulb neurons is shown in the figure. A: Dorsal view of the forebrain of a 4-day-old zebrafish
with the right habenula indicated by a black arrow. Cell bodies in the olfactory bulb (yellow arrowheads) have been labeled. B: DIC image
of the embryo in panel A. (C) High magnification of the left olfactory bulb of an embryo in which DiI (yellow) had been injected into the
medial right habenula. A retrogradely labeled neuron with a tufted dendrite characteristic of mitral cells (Fuller et al., J. Comp. Neurol.
499:218–230) is visible. An olfactory sensory neuron, labeled with DiD (cyan colored), extends a projection next to the DiI labeled habe-
nula afferent, further indicating it is in the olfactory bulb. D: DIC image of the embryo in panel C, showing the olfactory epithelium and
bulb. Bar ¼ 20 lm for panels A, B and 10 lm for panels C, D. ob, olfactory bulb; oe, olfactory epithelium.
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Published online in Wiley Online Library (wileyonlinelibrary.com)
The Journal of Comparative Neurology |Research in Systems Neuroscience