Journal article

Publication year: 2021

Pages: 3533-3560

Journal: The Journal of Comparative Neurology

Volume number: 529

Issue number: 15

ISSN: 0021-9967

eISSN: 1096-9861

Open access status: Hybrid

DOI Link: https://doi.org/10.1002/cne.25209

Publisher: Wiley

Abstract: 
The lateral complexes (LXs) are bilaterally paired neuropils in the insect brain that mediate communication between the central complex (CX), a brain center controlling spatial orientation, various sensory processing areas, and thoracic motor centers that execute locomotion. The LX of the desert locust consists of the lateral accessory lobe (LAL), and the medial and lateral bulb. We have analyzed the anatomical organization and the neuronal connections of the LX in the locust, to provide a basis for future functional studies. Reanalyzing the morphology of neurons connecting the CX and the LX revealed likely feedback loops in the sky compass network of the CX via connections in the gall of the LAL and a newly identified neuropil termed ovoid body. In addition, we characterized 16 different types of neuron that connect the LAL with other areas in the brain. Eight types of neuron provide information flow between both LALs, five types are LAL input neurons, and three types are LAL output neurons. Among these are neurons providing input from sensory brain areas such as the lobula and antennal neuropils. Brain regions most often targeted by LAL neurons are the posterior slope, the wedge, and the crepine. Two descending neurons with dendrites in the LAL were identified. Our data support and complement existing knowledge about how the LAL is embedded in the neuronal network involved in processing of sensory information and generation of appropriate behavioral output for goal-directed locomotion.

Harvard Citation style: Hensgen, R., Gothe, J., Jahn, S., Hummert, S., Schneider, K., Takahashi, N., et al. (2021) Organization and neural connections of the lateral complex in the brain of the desert locust, The Journal of Comparative Neurology, 529(15), pp. 3533-3560. https://doi.org/10.1002/cne.25209

APA Citation style: Hensgen, R., Gothe, J., Jahn, S., Hummert, S., Schneider, K., Takahashi, N., Pegel, U., Gotthardt, S., & Homberg, U. (2021). Organization and neural connections of the lateral complex in the brain of the desert locust. The Journal of Comparative Neurology. 529(15), 3533-3560. https://doi.org/10.1002/cne.25209