Morphological and Histochemical Study of the Nasal Cavity and Fused Olfactory Bulb of the Brown-Eared Bulbul,<i>Hysipetes amaurotis</i>

Yokosuka, Makoto; Hagiwara, Akiko; Saitô, Tôru; Aoyama, Masato; Ichikawa, Masumi; Sugita, Shoei

doi:10.2108/zsj.26.713

Cited by 13 publications

(21 citation statements)

References 52 publications

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“…As for the cytoarchitecture, the crow OB in the present study was divided into 5 layers by the staining of Kluver-Barrera and did not possess the olfactory ventricle. Although, the OB shows the multilayered structure possessing the olfactory ventricle in many birds like that in mammals [4], the OB do not possess the olfactory ventricle in the species with the fused OB (for example, the house sparrow and bulbul) [4,29]. Topographically and histologically, the OB of the Japanese jungle crow were similar to the OB of the house sparrow and bulbul which are highly-dependent on the vision.…”

Section: Discussionmentioning

confidence: 99%

Ultrastructural and Histochemical Properties of the Olfactory System in the Japanese Jungle Crow, Corvus macrorhynchos

et al. 2011

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ABSTRACT. Although it has been commonly believed that birds are more dependent on the vision and audition than the olfaction, recent studies indicate that the olfaction of birds is related to the reproductive, homing, and predatory behaviors. In an attempt to reveal the dependence on the olfactory system in crows, we examined the olfactory system of the Japanese jungle crow (Corvus macrorhynchos) by histological, ultrastructural, and lectin histochemical methods. The olfactory epithelium (OE) of the crow occupied remarkably a small area of the nasal cavity (NC) and had the histological and ultrastructural features like other birds. The olfactory bulb (OB) of the crow was remarkably small and did not possess the olfactory ventricle. The left and right halves of the OB were fused in many cases. In the lectin histochemistry, soybean agglutinin (SBA) and Vicia villosa agglutinin (VVA) stained a small number of the receptor cells (RCs) in the OE and the olfactory nerve layer (ONL) and glomerular layer (GL) on the dorsocaudal region of the OB. Phaseolus vulgaris agglutinin-E (PHA-E) stained several RCs in the OE and the ONL and GL on the ventral region of the OB. These results suggest that 1) the crow has less-developed olfactory system than other birds, and 2) the dedicated olfactory receptor cells project their axons to the specific regions of the OB in the crow.KEY WORDS: bird, lectin, nasal cavity, olfactory bulb, olfactory epithelium.

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Section: Discussionmentioning

confidence: 99%

Ultrastructural and Histochemical Properties of the Olfactory System in the Japanese Jungle Crow, Corvus macrorhynchos

et al. 2011

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“…Cytoarchitecture of the avian MOB is almost the same as in mammals. Right and left MOBs are frequently fused in the midline [14, 48]. In conclusion, the avian olfactory system consists solely of the main olfactory system composed of mammal-type MOB and mammal-type OE.…”

Section: Avian Olfactory Systemmentioning

confidence: 99%

Phylogenic Studies on the Olfactory System in Vertebrates

Taniguchi

2014

The Journal of Veterinary Medical Science

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The olfactory receptor organs and their primary centers are classified into several types. The receptor organs are divided into fish-type olfactory epithelium (OE), mammal-type OE, middle chamber epithelium (MCE), lower chamber epithelium (LCE), recess epithelium, septal olfactory organ of Masera (SO), mammal-type vomeronasal organ (VNO) and snake-type VNO. The fish-type OE is observed in flatfish and lungfish, while the mammal-type OE is observed in amphibians, reptiles, birds and mammals. The MCE and LCE are unique to Xenopus and turtles, respectively. The recess epithelium is unique to lungfish. The SO is observed only in mammals. The mammal-type VNO is widely observed in amphibians, lizards and mammals, while the snake-type VNO is unique to snakes. The VNO itself is absent in turtles and birds. The mammal-type OE, MCE, LCE and recess epithelium seem to be descendants of the fish-type OE that is derived from the putative primitive OE. The VNO may be derived from the recess epithelium or fish-type OE and differentiate into the mammal-type VNO and snake-type VNO. The primary olfactory centers are divided into mammal-type main olfactory bulbs (MOB), fish-type MOB and mammal-type accessory olfactory bulbs (AOB). The mammal-type MOB first appears in amphibians and succeeds to reptiles, birds and mammals. The fish-type MOB, which is unique to fish, may be the ancestor of the mammal-type MOB. The mammal-type AOB is observed in amphibians, lizards, snakes and mammals and may be the remnant of the fish-type MOB.

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“…Mouse AOB glomeruli can be visualized by immunohistochemical staining using specific antibody for Vesicular glutamate transporter 2 (VGLUT2) that is expressed at the terminals of glutamatergic neurons, as in the case of the MOB glomeruli [17,40,61]. The upper columns (A-D) of Fig.…”

Section: Histochemical Characteristics Of the Glomerulimentioning

confidence: 99%

Histological Properties of the Glomerular Layer in the Mouse Accessory Olfactory Bulb

Yokosuka

2012

Exp. Anim.

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Abstract:In mammals, the vomeronasal system (VS) originating from the vomeronasal organ (VNO; also called "Jacobson's organ") is considered to be a chemosensory system that recognizes "pheromone" signals. In the accessory olfactory bulb (AOB), the primary center of the VS, the glomerular cell layer (GL) of the AOB is regarded as an important functional area in the transmission of pheromone signals from vomeronasal sensory neurons (VSNs) of the VNO. In mice, the most frequently used animal model for the study of the VS, the GL of the AOB has several unique histological properties when compared with the main olfactory bulb (MOB): (i) each glomerular size is far smaller than in the MOB; (ii) many juxtaglomerular cells (JGCs) are GABA immunopositive, but subpopulations of cells distributed in the AOB are tyrosine hydroxylase-or calcium-binding protein immunopositive; and (iii) the dendritic branching pattern of the JGC in the AOB is heteromeric. The biological significance of the mammalian VS is still debated. The unique histological properties of the mouse AOB summerized in the present review may give some useful information that may help in understanding the function of the mammalian VS.

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Morphological and Histochemical Study of the Nasal Cavity and Fused Olfactory Bulb of the Brown-Eared Bulbul,Hysipetes amaurotis

Cited by 13 publications

References 52 publications

Ultrastructural and Histochemical Properties of the Olfactory System in the Japanese Jungle Crow, Corvus macrorhynchos

Ultrastructural and Histochemical Properties of the Olfactory System in the Japanese Jungle Crow, Corvus macrorhynchos

Phylogenic Studies on the Olfactory System in Vertebrates

Histological Properties of the Glomerular Layer in the Mouse Accessory Olfactory Bulb

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