scholarly journals Moth pheromone‐selective projection neurons with cell bodies in the antennal lobe lateral cluster exhibit diverse morphological and neurophysiological characteristics

2019 ◽  
Vol 527 (9) ◽  
pp. 1443-1460 ◽  
Author(s):  
Seong‐Gyu Lee ◽  
Christine Fogarty Celestino ◽  
Jeffrey Stagg ◽  
Christoph Kleineidam ◽  
Neil J. Vickers
Keyword(s):  
Antennal Lobe ◽  
Projection Neurons ◽  
Lobe Latéral

scholarly journals Olfactory Projection Neurons From the Moth Antennal Lobe Lateral Cluster exhibit Diverse Morphological and Neurophysiological Characteristics

2018 ◽  
Author(s):  
Seong-Gyu Lee ◽  
Christine Fogarty Celestino ◽  
Jeffrey Stagg ◽  
Christoph Kleineidam ◽  
Neil J. Vickers
Keyword(s):  
Antennal Lobe ◽  
Cell Cluster ◽  
Morphological Properties ◽  
Projection Neurons ◽  
Physiological Characterization ◽  
Lobe Latéral ◽  
Excitatory Projection ◽  
Dendritic Arbors

AbstractOlfactory projection neurons convey information from the insect antennal lobe (AL) to higher centers in the brain. Many studies on moths have reported excitatory projection neurons with cell bodies in the medial cell cluster (mcPNs) that predominantly send an axon from the AL to calyces of the mushroom body (CA) via the medial antennal lobe tract (mALT) and then to the lateral horn (LH) of the protocerebrum. These neurons tend to have dendritic arbors restricted to a single glomerulus (i.e. they are uniglomerular). In this study, we report on the physiological and morphological properties of a group of pheromone-responsive olfactory projection neurons with cell bodies in the moth AL lateral cell cluster (lcPNs) of two heliothine moth species. While mcPNs typically exhibit a narrow odor tuning range related to the restriction of their dendritic arbors within a single glomerulus, lcPNs exhibited an array of morphological and physiological configurations. Pheromone-responsive lcPNs varied in their associations with glomeruli (uniglomerular and multiglomerular), dendritic arborization structure and connections to higher brain centers with projections primarily through the lateral antennal lobe tract and to a lesser extent the mediolateral antennal lobe tract to a variety of protocerebral targets including ventrolateral and superior neuropils as well as LH. Physiological characterization of lcPNs also revealed a diversity of response profiles including those either enhanced by or reliant upon presentation of a pheromone blend. These responses manifested themselves as higher maximum firing rates and/or improved temporal resolution of pulsatile stimuli. lcPNs therefore participate in conveying a variety of olfactory information relating to qualitative and temporal facets of the pheromone stimulus to a more expansive number of protocerebral targets than their mcPN counterparts. The role of lcPNs in the overall scheme of olfactory processing is discussed.

Morphology and physiology of antennal lobe projection neurons in the hawkmoth Agrius convolvuli

2017 ◽  
Vol 98 ◽  
pp. 214-222 ◽  
Author(s):  
Takuya Nirazawa ◽  
Takeshi Fujii ◽  
Yoichi Seki ◽  
Shigehiro Namiki ◽  
Tomoki Kazawa ◽  
...  
Keyword(s):  
Antennal Lobe ◽  
Projection Neurons

Temporal summation properties of the olfactory projection neurons in the moth antennal lobe revealed by optogenetic stimulation

2011 ◽  
Vol 71 ◽  
pp. e79
Author(s):  
Masashi Tabuchi ◽  
Takeshi Sakurai ◽  
Hidefumi Mitsuno ◽  
Shigehiro Namiki ◽  
Ryo Minegishi ◽  
...  
Keyword(s):  
Antennal Lobe ◽  
Temporal Summation ◽  
Projection Neurons ◽  
Optogenetic Stimulation

Offset response of the olfactory projection neurons in the moth antennal lobe

Biosystems ◽  
2011 ◽  
Vol 103 (3) ◽  
pp. 348-354 ◽  
Author(s):  
Shigehiro Namiki ◽  
Ryohei Kanzaki
Keyword(s):  
Antennal Lobe ◽  
Projection Neurons

scholarly journals Pheromone-sensitive glomeruli in the primary olfactory centre of ants

2006 ◽  
Vol 273 (1598) ◽  
pp. 2219-2225 ◽  
Author(s):  
Nobuhiro Yamagata ◽  
Hiroshi Nishino ◽  
Makoto Mizunami
Keyword(s):  
Social Insects ◽  
Antennal Lobe ◽  
Communication Systems ◽  
Alarm Pheromone ◽  
Brain Structures ◽  
Projection Neurons ◽  
Sexual Pheromone ◽  
Social Bees ◽  
Colony Defence ◽  
Ecological Dominance

Tremendous evolutional success and the ecological dominance of social insects, including ants, termites and social bees, are due to their efficient social organizations and their underlying communication systems. Functional division into reproductive and sterile castes, cooperation in defending the nest, rearing the young and gathering food are all regulated by communication by means of various kinds of pheromones. No brain structures specifically involved in the processing of non-sexual pheromone have been physiologically identified in any social insects. By use of intracellular recording and staining techniques, we studied responses of projection neurons of the antennal lobe (primary olfactory centre) of ants to alarm pheromone, which plays predominant roles in colony defence. Among 23 alarm pheromone-sensitive projection neurons recorded and stained in this study, eight were uniglomerular projection neurons with dendrites in one glomerulus, a structural unit of the antennal lobe, and the remaining 15 were multiglomerular projection neurons with dendrites in multiple glomeruli. Notably, all alarm pheromone-sensitive uniglomerular projection neurons had dendrites in one of five ‘alarm pheromone-sensitive (AS)’ glomeruli that form a cluster in the dorsalmost part of the antennal lobe. All alarm pheromone-sensitive multiglomerular projection neurons had dendrites in some of the AS glomeruli as well as in glomeruli in the anterodorsal area of the antennal lobe. The results suggest that components of alarm pheromone are processed in a specific cluster of glomeruli in the antennal lobe of ants.

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