检索结果-内蒙古大学图书馆

Encoding of location and intensity of noxious indentation into rat skin by spatial populations of cutaneous mechano-nociceptors

引用

JOURNAL OF NEUROPHYSIOLOGY 2000年第5期83卷 3049-3061页

作者： Khalsa, PS Zhang, C Qin, YX SUNY Stony Brook Dept Orthopaed Stony Brook NY 11794 USA SUNY Stony Brook Bioengn Program Stony Brook NY 11794 USA

The ability of a spatial population of cutaneous, A delta, and C mechano-nociceptors to encode the location and intensity of a noxious, cutaneous indentation was examined using an isolated preparation in a rat model. Skin and its intact innervation were harvested from the medial thigh of the rat hindlimb and placed in a dish, with the cerium side down, containing synthetic interstitial fluid. The margins of the skin were coupled to an apparatus that could stretch and apply compression to the skin. The skin was suspended on top of a deformable platform whose bulk, nonlinear, compressive compliance emulated that found in vivo. The isolated preparation facilitated examination of the spatial population response by eliminating the nonlinear geometry and inhomogeneous compressive compliance present in-vivo. Spatial population responses (SPR) were formed from recordings of single neurons that were stimulated by compressing the skin with an indenter (flat cylinder, 3-mm diam) at discrete intervals from the center of their receptive fields. SPR were composed of the neural responses (z axis) at each indentation location (x, y plane), and were analyzed quantitatively using nonlinear regression to fit an equation of a Gaussian surface. Both A delta and C SPR accurately encoded the location and intensity of noxious indentation. The intensity of the stimulus was encoded in the peak neural response of the SPR, which had a nonlinear relationship to the compressive force. The location of the stimulus was encoded in the x, y position of the peak of the SPR. The position of the peak remained constant with increasing magnitudes of compressive force. The overall form of the SPR also remained constant with changes of compressive load, suggesting a possible role for encoding in the SPR some aspects of shape of a noxious stimulus.

关键词：方差分析机械感受器/解剖学和组织学机械感受器/细胞学机械感受器/生理学模型神经学神经纤维有髓鞘的/生理学神经元传入/生理学疼痛感受器/解剖学和组织学疼痛感受器/细胞学疼痛感受器/生理学物理刺激大鼠 Sprague-Dawley 感觉阈/生理学皮肤/解剖学和组织学皮肤/神经支配皮肤生理学现象动物女(雌)性男(雄)性大鼠

来源：评论

学校读者我要写书评

暂无评论

Analysis of acoustic communication by ants

引用

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2000年第4期108卷 1920-1929页

作者： Hickling, R Brown, RL Univ Mississippi Natl Ctr Phys Acoust University MS 38677 USA Mississippi State Univ Dept Entomol & Plant Pathol Mississippi State MS 39762 USA

An analysis is presented of acoustic communication by ants, based on near-field theory and on data obtained from the black imported fire ant Solenopsis richteri and other sources. Generally ant stridulatory sounds are barely audible, but they occur continuously in ant colonies. Because ants appear unresponsive to airborne sound, myrmecologists have concluded that stridulatory signals are transmitted through the substrate. However, transmission through the substrate is unlikely, for reasons given in the paper. Apparently ants communicate mainly through the air, and the acoustic receptors are hairlike sensilla on the antennae that respond to particle sound velocity. This may seem inconsistent with the fact that ants are unresponsive to airborne sound (on a scale of meters), but the inconsistency can be resolved if acoustic communication occurs within the near field, on a scale of about 100 mm. In the near field, the particle sound velocity is significantly enhanced and has a steep gradient. These features can be used to exclude extraneous sound, and to determine the direction and distance of a near-field source. Additionally, we observed that the tracheal air sacs of S. richteri can expand within the gaster, possibly amplifying the radiation of stridulatory sound. (C) 2000 Acoustical Society of America. [S0001-4966(00)04210-7].

关键词：动物交往蚁/解剖学和组织学机械感受器/解剖学和组织学显微镜检查电子扫描声波谱图术发声动物/生理学动物

来源：评论

学校读者我要写书评

暂无评论

Morphology and physiology of auditory and vibratory ascending interneurones in bushcrickets

引用

JOURNAL OF EXPERIMENTAL ZOOLOGY 2000年第3期286卷 219-230页

作者： Nebeling, B Univ Marburg AG Neurobiol FB Biol MZ Augenheilkunde D-35033 Marburg Germany

Auditory/vibratory interneurones of the bushcricket species Decticus albifrons and Decticus verrucivorus were studied with intracellular dye injection and electrophysiology. The morphologies of five physiologically characterised auditory/vibratory interneurones are shown in the brain, subesophageal and prothoracic ganglia. Based on their physiology, these five interneurones fall into three groups, the purely auditory or sound neurones: S-neurones, the purely vibratory V-neurones, and the bimodal vibrosensitive VS-neurones. The S1-neurones respond phasically to airborne sound whereas the S4-neurones exhibit a tonic spike pattern. Their somata are located in the prothoracic ganglion and they show an ascending axon with dendrites located in the prothoracic, subesophageal ganglia, and the brain. The VS3-neurone, responding to both auditory and vibratory stimuli in a tonic manner, has its axon traversing the brain, the suboesophageal ganglion and the prothoracic ganglion although with dendrites only in the brain. The V1- and V2-neurones respond to vibratory stimulation of the fore- and midlegs with a tonic discharge pattern, and our data show that they receive inhibitory input suppressing their spontaneous activity. Their axon transverses the prothoracic ganglion, subesophageal ganglion and terminate in the brain with dendritic branching. Thus the auditory S-neurones have dendritic arborizations in all three ganglia (prothoracic, subesophageal, and brain) compared to the vibratory (V) and vibrosensitive (VS) neurones, which have dendrites almost only in the brain. The dendrites of the S-neurones are also more extensive than those of the V-, VS-neurones. V- and VS-neurones terminate more laterally in the brain. Due to an interspecific comparison of the identified auditory interneurones the S1-neurone is found to be homologous to the TN1 of crickets and other bushcrickets, and the S4-neurone also can be called AN2. (C) 2000 Wiley-Liss, Inc.

关键词：声刺激动物交往听觉通路/生理学轴突/生理学脑/细胞学脑/生理学树突/生理学诱发电位/生理学神经节无脊椎动物/细胞学神经节无脊椎动物/生理学蟋蟀科/解剖学和组织学蟋蟀科/生理学中间神经元/细胞学中间神经元/生理学机械感受器/解剖学和组织学机械感受器/生理学神经元传入/细胞学神经元传入/生理学振动动物女(雌)性男(雄)性

来源：评论

学校读者我要写书评

暂无评论

Somatotopy of the lateral line projection in larval zebrafish

引用

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 1999年第13期96卷 7558-7562页

作者： Alexandre, D Ghysen, A Univ Montpellier 2 Neurogenet Lab F-34095 Montpellier 5 France

We examined the topography of the lateral line primary projection in zebrafish larvae by double labeling. The projections of two identified neuromasts of the posterior lateral line are seen as two separate sets of fibers that show reproducible spatial relationships: the projection of the anterior neuromast is always ventrolateral to that of a more posteriorly located neuromast. The same rule applies to the projection of anterior lateral line neuromasts. The position of the neuromasts along the antero posterior axis of the fish therefore is represented in the central projection of the sensory neurons. This somatotopy is similar to, and may be at the origin of, the tonotopic projection of the cochlear hair cells in mammals.

关键词：荧光染料机械感受器/解剖学和组织学机械感受器/生理学斑马鱼/解剖学和组织学斑马鱼/生理学动物

来源：评论

学校读者我要写书评

暂无评论

Feeling the vibes: chordotonal mechanisms in insect hearing

引用

CURRENT OPINION IN NEUROBIOLOGY 1999年第4期9卷 389-393页

作者： Eberl, DF Univ Iowa Dept Biol Sci Iowa City IA 52242 USA

To hear, insects use diverse external structures, which transform acoustic signals to mechanical ones, coupled to astonishingly uniform mechanosensory transducers, the chordotonal organs. New evidence showing that chordotona[ organs and vertebrate auditory hair cells are developmentally related and that chordotonal organs and insect bristle organs are mechanistically related suggests that all these ciliated mechanoreceptors may be derived from the same ancestral molecular mechanotransduction complex. Identification of these elusive molecules will settle this issue.

关键词：果蝇属进化分子听力/遗传学听力/生理学昆虫/生理学机械感受器/解剖学和组织学机械感受器/生理学动物

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：