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  • 1
    Electronic Resource
    Electronic Resource
    Structure and development of central arborizations of hair follicle primary afferent fibers (1988)
    Springer
    Anatomy and embryology 178 (1988), S. 271-279 
    Details
    ISSN: 1432-0568
    Keywords: Cutaneous afferents ; Dorsal horn ; Spinal cord ; Development ; Golgi method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The present study describes the structure and development of the flame-shaped central arborizations of hair follicle (HF) afferents in the lumbosacral spinal cord of the rat. Tissue was processed according to the rapid Golgi method at successive stages of development from embryonic day 17 through postnatal day 30. Collaterals of most HF afferents were found to enter the dorsal horn via a characteristic U-shaped pathway which often parallels the vascular pattern. The HF collaterals can first be identified at embryonic day 19 and by postnatal day 5 they have established the dorso-ventral and rostro-caudal limits of their field of arborization. Dorsally the arbors extend no further than the inner zone of lamina II (IIi) at any stage of development. Short aberrant branches were observed on some HF collaterals during the prenatal period but none of these developed synaptic terminals or contributed branches to other arbors. Each HF collateral formed a single well defined flame-shaped arbor with a distribution and branching pattern which could be distinguished from that of other afferents throughout the postnatal developmental period. Two types of HF collaterals were observed. Structure and distribution patterns suggest that type I collaterals are derived from G and T HF afferents while collaterals in the type II category are probably derived from both G and T as well as D (A-delta) HF afferents. Type I collaterals divide into well defined medial and lateral collateral branches which arborize mainly in lamina III with a few branches to lamina IV. Type II collaterals are characterized by a delicate arbor which is more vertically oriented than type I arbors. These arbors also have a few branches in lamina IV but distribute mainly to laminae III and IIi.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00318230
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  • 2
    Electronic Resource
    Electronic Resource
    Neuronal cytoplasmic inclusions in the dorsal horn and supraoptic nucleus of the squirrel monkey, Saimiri sciureus (1977)
    Springer
    Cell & tissue research 176 (1977), S. 37-46 
    Details
    ISSN: 1432-0878
    Keywords: Cytoplasmic inclusions ; Dorsal horn ; Supraoptic nucleus ; Saimiri sciureus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In the squirrel monkey (Saimiri sciureus) two types of cytoplasmic inclusion bodies have been observed sporadically in neurons of both the dorsal horn (Rexed's laminae I–III in the lumbosacral region) and the supraoptic nucleus. One of these, designated here the “vesicular body”, is a round inclusion which measures up to 1.4 μ in diameter. It occurs only in perikarya and is composed of vesicular-like chambers 300–400 Å in diameter. We have not found previous references to this structure in the literature, but its 50 Å substructural particles are similar in size to those described in nematosomes. The other inclusion, a “filamentous whorl”, is found in nerve cell bodies and dendrites and it is structurally similar to the Hirano body. The structure measures up to 2.2 μ in diameter and is composed of circularly arrayed filaments which vary in configuration and size depending on the plane of section. There are no indications that the vesicular body and the filamentous whorl are in any way related to each other; and usually both are not found in the same cell profiles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00220342
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  • 3
    Electronic Resource
    Electronic Resource
    Morphogenesis of the Hirano body in neurons of the squirrel monkey dorsal horn (1978)
    Springer
    Journal of neurocytology 7 (1978), S. 395-403 
    Details
    ISSN: 1573-7381
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Electron microscopic investigation of laminae I–III in the lumbosacral region of the squirrel monkey spinal cord has disclosed possible stages in the morphogenesis of the Hirano body. These bodies occur occasionally in nerve cell bodies and dendrites. They are round to oval in shape, measure up to 2.2 μm in diameter and are composed of circular layers of 10 nm filaments. In several instances in the present study, Hirano bodies were observed in close association with the Golgi apparatus. Here Golgi-related vesicles were attached to the external surface of the Hirano bodies. In one instance a cluster of developing Hirano bodies of various sizes was observed. The smaller bodies were located nearest the Golgi apparatus while the larger were further away. In this case several short filaments, which may be precursors of the longer filaments which make up the layers of the inclusion, were observed in the cytoplasm between the Golgi cisternae and the smaller Hirano bodies. These observations suggest that the Golgi apparatus plays a major role in the production of the Hirano body. The significance of the occurrence of these inclusions is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01173987
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  • 4
    Electronic Resource
    Electronic Resource
    Myelinated granule cell bodies in the cerebellum of the monkey (Saimiri sciureus)Supported by NIH Grant NS-6925-10 from NINDS. (1977)
    New York, NY [u.a.] : Wiley-Blackwell
    The @Anatomical Record 187 (1977), S. 249-255 
    Details
    ISSN: 0003-276X
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: Electronmicrographs of both the vermis and hemisphere of the cerebellum of the squirrel monkey (Saimiri sciureus) show numerous granule cell bodies partially or completely surrounded by myelin. The myelin is of the compact type and consists of 1 to 13 lamellae. In several cases of partially ensheathed cells the myelin is clearly derived from extensions of myelin sheaths that surround small caliber axons. Either all or only the outer lamellae surrounding the axon contribute to the extensions. In the first instance the myelin buckles at its mesaxon pole and the resulting doubled flap extends for a variable distance along the cell surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ar.1091870210
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  • 5
    Electronic Resource
    Electronic Resource
    Vasoactive intestinal peptide-immunoreactive nerves in the rat kidney (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    The @Anatomical Record 219 (1987), S. 193-203 
    Details
    ISSN: 0003-276X
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: An indirect immunohistochemical method in which an avidin-biotinylated horseradish peroxidase complex is bound to the secondary antibody was used to visualize vasoactive intestinal peptide-immunoreactive (VIPI) nerves in the rat kidney. Rats were perfused with 4% paraformaldehyde or 2% paraformaldehyde + 0.15% picric acid in 0.1 M phosphate buffer, then transferred to the buffer. After 24-48 hours, the kidneys were sectioned with a Vibratome at 200 or 300 μm and incubated in the primary antiserum for 18 hours at room temperature. A sparse plexus of VIPI nerves innervates the rat renal calyx. Some VIPI nerves innervate interlobar arteries and each succeeding segment of the arterial tree including afferent arterioles, but most innervate arcuate and interlobular arteries. VIPI axons do not innervate each arcuate artery or each interlobular branch of an arcuate artery with equal density. Although some axons follow each interlobular branch, most form a dense plexus on only one or two branches. Therefore, most VIPI nerves in the rat kidney innervate a restricted segment of the renal arterial tree. These nerves may be efferent and may selectively dilate arcuate and smaller arteries, or they may be afferent and may sense local changes in mechanical or chemical parameters.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ar.1092190213
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  • 6
    Electronic Resource
    Electronic Resource
    Myelinated nerve cell bodies in the dorsal horn of the monkey (Saimiri sciureus)Supported by NIH Grant NS-06925-10 from NINDS. (1976)
    New York, NY [u.a.] : Wiley-Blackwell
    American Journal of Anatomy 147 (1976), S. 33-47 
    Details
    ISSN: 0002-9106
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: While observing electronmicroscopic preparations of laminae I-III of Rexed (1952), taken from the lumbosacral region of squirrel monkey spinal cord, several small neuronal cell bodies were found which were partially or completely encircled by compact myelin sheaths of varying thickness. Though found in all three laminae, the occurrence of these perikaryal sheaths was less frequent in the “inner zone” of lamina II where there were few myelinated fibers. Perikaryal profiles which were completely surrounded by myelin exhibited neither internal mesaxons nor external tongue processes and the origin of their myelin is obscure. In cases of partially enveloped cells the myelin was often clearly derived from extensions of myelin sheaths surrounding small-diameter axons. These overgrowths of myelin extended away from their axons at a pole near their internal mesaxon and spread out across the surface of neighboring nerve cells. In some cases the extensions were derived from the entire axonal sheath while in others only the external lamellae were included. The external tongue process, when observed, was located at the distal end of the axonal myelin extension. Overgrowths of axonal myelin which were unrelated to neuronal cell bodies were also found but these formations were less extensive.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aja.1001470104
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