Fine morphological characteristics and microtopography of the free nerve endings of the human digital skin

1980 ◽  
Vol 198 (4) ◽  
pp. 643-656 ◽  
Author(s):  
Nikolajs Cauna
Keyword(s):  
Morphological Characteristics ◽  
Nerve Endings ◽  
Free Nerve Endings

INTRAEPIDERMAL FREE NERVE ENDINGS IN GUINEA PIGS

1982 ◽  
Vol 9 (2) ◽  
pp. 107-116 ◽  
Author(s):  
Motoyuki Mihara ◽  
Ken Hashimoto ◽  
Masanobu Kumakiri
Keyword(s):  
Guinea Pigs ◽  
Nerve Endings ◽  
Free Nerve Endings

Competition during innervation of embryonic amphibian head skin

1983 ◽  
Vol 218 (1210) ◽  
pp. 49-59 ◽  
Keyword(s):  
Horseradish Peroxidase ◽  
Xenopus Laevis ◽  
Trigeminal Ganglion ◽  
Nerve Endings ◽  
Movement Detector ◽  
Dorsal Midline ◽  
Intact Side ◽  
Free Nerve Endings ◽  
Peripheral Innervation ◽  
Peripheral Sensory

We have examined the initial innervation of the head skin in Xenopus laevis embryos which is by two classes of trigeminal mechanoreceptor with beaded ‘free’ nerve-endings. By recording receptive areas electrophysiologically and staining peripheral sensory neurites with horseradish peroxidase, we have shown that ‘movement detector’ neurites from one trigeminal ganglion do not normally cross the dorsal midline of the head to innervate areas of skin on the opposite side. However, if one trigeminal ganglion is removed before peripheral innervation starts, movement detector neurites from the intact side will now cross the midline to innervate contralateral skin. These observations suggest a specific competitive interaction between movement detector neurites during their innervation of head skin. The second class of receptor, ‘rapid transient’ detectors, have a different pattern of innervation, crossing the midline in both normal and operated animals.

Temperature-Induced Changes in the Number of Vesicles in the Free Nerve Endings of Temperature Neurons of the Snake

1995 ◽  
Vol 12 (2) ◽  
pp. 143-150 ◽  
Author(s):  
Shin-Ichi Terashima ◽  
Peng-Jia Jiang ◽  
Vinci Mizuhira ◽  
Hiroshi Hasegawa ◽  
Mitsuru Notoyat
Keyword(s):  
Nerve Endings ◽  
Free Nerve Endings ◽  
Induced Changes

Occurrence and distribution of free nerve endings in the distal iliotibial tract system of the knee

1996 ◽  
Vol 4 (2) ◽  
pp. 111-115 ◽  
Author(s):  
P. Lobenhoffer ◽  
R. Biedert ◽  
E. Stauffer ◽  
Chr Lattermann ◽  
T. G. Gerich ◽  
...  
Keyword(s):  
Nerve Endings ◽  
Iliotibial Tract ◽  
Free Nerve Endings

Histomorphometric Evaluation of Mechanoreceptors and Free Nerve Endings in Human Lateral Ankle Ligaments

2008 ◽  
Vol 29 (1) ◽  
pp. 87-90 ◽  
Author(s):  
Miguel R. B. Moraes ◽  
Maria Luzete C. Cavalcante ◽  
José Alberto D. Leite ◽  
Francisco Valdecir Ferreira ◽  
Antônio Juvêncio O. Castro ◽  
...  
Keyword(s):  
Nerve Endings ◽  
Ankle Ligaments ◽  
Lateral Ankle ◽  
Free Nerve Endings ◽  
Lateral Ankle Ligaments

scholarly journals ISOLATION OF NERVE ENDINGS FROM THE POSTERIOR PITUITARY GLAND

1965 ◽  
Vol 25 (3) ◽  
pp. 179-193 ◽  
Author(s):  
Frank S. Labella ◽  
Madhu Sanwal
Keyword(s):  
Electron Microscopic Examination ◽  
Basement Membranes ◽  
Nerve Endings ◽  
Posterior Pituitary ◽  
Neurosecretory Granules ◽  
Electron Microscopic ◽  
Free Nerve Endings ◽  
Pituitary Glands ◽  
Posterior Pituitary Gland ◽  
Staining Techniques

Bovine posterior pituitary glands were homogenized in 10 per cent sucrose and fractionated by differential centrifugation. The following centrifugation procedure resulted in the most satisfactory separation: 1000 g for 15 minutes—nuclei, connective tissue, basement membranes with associated endothelium, giant nerve endings, and whole pituicytes; 4200 g for 15 minutes—free nerve endings, including Herring bodies; 17,000 g for 15 minutes—mitochondria; 68,000 g for 15 minutes—neurosecretory granules. Electron microscopic examination was carried out on whole tissue and on the isolated fractions. Isolated nerve endings were examined also by negative staining techniques. Isolated nerve endings retain an apparently normal complement of mitochondria, neurosecretory granules, and microvesicles ("synaptic" vesicles). The free nerve endings closely resemble those observed in sections of intact posterior pituitary tissue. Free microvesicles were not observed in any of the fractions isolated and apparently sediment at centrifugal forces higher than those employed in this study.

Substance P Immunoreactive Nerve Fibers of the Canine Laryngeal Mucosa

1987 ◽  
Vol 97 (1) ◽  
pp. 39-46 ◽  
Author(s):  
Takemoto Shin ◽  
Shigeru Wada ◽  
Tadatsugu Maeyama ◽  
Shun Watanabe
Keyword(s):  
Substance P ◽  
Light And Electron Microscopy ◽  
Lower Surface ◽  
Nerve Fibers ◽  
Taste Bud ◽  
Nerve Endings ◽  
Free Nerve Endings ◽  
Laryngeal Mucosa ◽  
Glandular Cells ◽  
Taste Hairs

Substance P (SP) immunoreactive nerve endings in the laryngeal mucosa were studied by PAP immunohistochemistry with light and electron microscopy. SP immunoreactive sensory endings were observed in the epithelium as intra-epithelial free nerve endings and taste bud-like structures. A small number of autonomic SP immunoreactive nerve fibers were observed running parallel to arterioles which were over 30 μm in diameter and terminated in glandular cells. Contrary to findings by silver impregnation, intraepithelial free nerve endings were more frequently observed on the lower surface of the vocal cord. The taste bud-like structures were classified into two different types: (1) simple terminations and (2) reticular terminations, according to the mode of the SP immunoreactive nerve fiber. Immature or degenerated taste bud-like structures in the larynx were assumed to be mechanical receptors because these receptors lacked outer taste pores and taste hairs.

scholarly journals Needle-nerve interaction in acupuncture: A morphological study.

2021 ◽  
Vol 24 (3) ◽  
pp. 324-333
Author(s):  
N. D. Dimitrov ◽  
D. Y. Atanasova ◽  
N. S. Tomov ◽  
N. L. Pirovsky ◽  
I. G. Ivanova ◽  
...  
Keyword(s):  
Mast Cells ◽  
Muscle Spindles ◽  
Systemic Effect ◽  
Hair Follicles ◽  
Nerve Endings ◽  
Sebaceous Glands ◽  
Nerve Fibres ◽  
Free Nerve Endings ◽  
Needle Tract ◽  
Acupuncture Effects

Some acupuncture effects are considered to be caused by interaction with nerve structures in and around the acupoints. The aim of the present study was to investigate the nerve structures that interact with the needle in acupuncture and to present their distribution in acupoint tissues. To do this, the microscopic anatomy and its alterations in the vicinity of the needle tract formed after experimental acupuncture in ST36 acupoint in rats were described by histological and immunohistochemical methods. Free nerve endings were seen in the epidermis, and surrounding hair follicles and sebaceous glands in the dermis. Muscle spindles and larger nerve fibres close to blood vessels were also observed deeper, in the muscular plane. Needling of the acupoint caused destruction and displacement of hair follicles together with their free nerve endings. Deeper, some muscle spindles and smaller nerves were displaced and disrupted. Larger nerves were not destroyed, but rather pushed aside by the needle. Furthermore, needle impact also caused degranulation of mast cells near the needle tract. The findings suggest multiple ways of interaction between acupuncture needle and the nerve structures of the acupoint. Acupuncture combines destruction, disruption and displacement of nerve structures, together with additional interaction with mast cells. Those mechanisms are involved in eliciting the needling sensation and are possibly associated with the systemic effect of acupuncture.

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