Core-and-belt organisation of the mesencephalic and forebrain auditory centres in turtles: Expression of calcium-binding proteins and metabolic activity

被引:10
作者
Belekhova, Margarita G. [1 ]
Chudinova, Tatiana V. [1 ]
Reperant, Jacques [2 ]
Ward, Roger [2 ,3 ]
Jay, Bruno [2 ]
Vesselkin, Nikolai P. [1 ]
Kenigfest, Natalia B. [1 ,2 ]
机构
[1] Russian Acad Sci, IM Sechenov Evolutionary Physiol & Biochem Inst, Lab Evolut Neuronal Interact, St Petersburg 196140, Russia
[2] Museum Natl Hist Nat, CNRS, UMR 7221, Dept Regulat Dev & Divers Mol,USM 0501, F-75005 Paris, France
[3] Univ Quebec Trois Rivieres, Lab Neuropsychol, Trois Rivieres, PQ GA9 5H7, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
Comparative anatomy; Auditory system; Core-belt organisation; Calcium-binding proteins; Cytochrome oxidase; Reptiles; GENE-RELATED PEPTIDE; CYTOCHROME-OXIDASE ACTIVITY; DORSAL VENTRICULAR RIDGE; CENTRAL-NERVOUS-SYSTEM; ASCENDING SPINAL PROJECTIONS; AVIAN TORUS SEMICIRCULARIS; COCHLEAR NUCLEAR-COMPLEX; MEDIAL GENICULATE-BODY; BRAIN-STEM AFFERENTS; INFERIOR COLLICULUS;
D O I
10.1016/j.brainres.2010.05.026
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
The distribution of immunoreactivity to the calcium-binding proteins parvalbumin, calbindin and calretinin and of cytochrome oxidase activity was studied in the mesencephalic (torus semicircularis), thalamic (nucleus reuniens) and telencephalic (ventromedial part of the anterior dorsal ventricular ridge) auditory centres of two chelonian species Emys orbicularis and Testudo horsfieldi. In the torus semicircularis, the central nucleus (core) showed intense parvalbumin immunoreactivity and high cytochrome oxidase activity, whereas the laminar nucleus (belt) showed low cytochrome oxidase activity and dense calbindin/calretinin immunoreactivity. Within the central nucleus, the central and peripheral areas could be distinguished by a higher density of parvalbumin immunoreactivity and cytochrome oxidase activity in the core than in the peripheral area. In the nucleus reuniens, the dorsal and ventromedial (core) regions showed high cytochrome oxidase activity and immunoreactivity to all three calcium-binding proteins, while its ventrolateral part (belt) was weakly immunoreactive and showed lower cytochrome oxidase activity. In the telencephalic auditory centre, on the other hand, no particular region differed in either immunoreactivity or cytochrome oxidase activity. Our findings provide additional arguments in favour of the hypothesis of a core-and-belt organisation of the auditory sensory centres in non-mammalian amniotes though this organisation is less evident in higher order centres. The data are discussed in terms of the evolution of the auditory system in amniotes. (C) 2010 Elsevier B.V. All rights reserved.
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页码:84 / 102
页数:19
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