The histology of the hypophysial stalk and median eminence in man with special reference to blood vessels, nerve fibers and a peculiar neurovascular zone in this region

1948 ◽  
Vol 100 (3) ◽  
pp. 273-295 ◽  
Author(s):  
J. D. Green
Keyword(s):  
Special Reference ◽  
Blood Vessels ◽  
Median Eminence ◽  
Nerve Fibers

Innervation of endoneurial microvessels in human sural nerve

1992 ◽  
Vol 50 (1) ◽  
pp. 920-921
Author(s):  
John L. Beggs ◽  
Peter C. Johnson ◽  
Astrid G. Olafsen ◽  
C. Jane Watkins
Keyword(s):  
Blood Flow ◽  
Blood Vessels ◽  
Blood Supply ◽  
Peripheral Nerves ◽  
Sural Nerve ◽  
Nerve Fibers ◽  
Arterial Supply ◽  
Autonomic Nerve ◽  
Vasa Nervorum ◽  
Endoneurial Blood Flow

The blood supply (vasa nervorum) to peripheral nerves is composed of an interconnected dual circulation. The endoneurium of nerve fascicles is maintained by the intrinsic circulation which is composed of microvessels primarily of capillary caliber. Transperineurial arterioles link the intrinsic circulation with the extrinsic arterial supply located in the epineurium. Blood flow in the vasa nervorum is neurogenically influenced (1,2). Although a recent hypothesis proposes that endoneurial blood flow is controlled by the action of autonomic nerve fibers associated with epineurial arterioles (2), our recent studies (3) show that in addition to epineurial arterioles other segments of the vasa nervorum are also innervated. In this study, we examine blood vessels of the endoneurium for possible innervation.

Hearing Loss and Diabetes in an African American Adult

2020 ◽  
pp. 280-297
Author(s):  
Diane M. Scott
Keyword(s):  
Hearing Loss ◽  
African American ◽  
Blood Vessels ◽  
Nerve Fibers ◽  
African American Adult ◽  
Common Effect ◽  
Uncontrolled Diabetes ◽  
American Adult

Research has linked hearing loss to other medical conditions such as diabetes. Studies have shown that hearing loss is more common in individuals who have diabetes than in those who do not. Hyperglycemia, or raised blood sugar, is a common effect of uncontrolled diabetes and over time leads to serious damage to many of the body's systems, especially the nerves and the blood vessels. Consequently, diabetes can affect the blood vessels of the inner ear and the vestibulocochlear (VIII cranial) nerve fibers. This case study examines the interrelationship between diabetes and hearing loss in an African American adult while examining the issues of the higher prevalence of diabetes in African Americans and the role of audiologists in the care of individuals with hearing loss and diabetes.

Involvement of Carbon Monoxide in the Innervation of the Canine Cervical Esophagus and Trachea

2000 ◽  
Vol 109 (2) ◽  
pp. 133-135 ◽  
Author(s):  
Yasuo Hisa ◽  
Kazuhiro Shogaki ◽  
Shinobu Koike ◽  
Nobuhisa Tadaki ◽  
Hitoshi Bamba ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Blood Vessels ◽  
Heme Oxygenase ◽  
Myenteric Plexus ◽  
Nerve Fibers ◽  
Cervical Esophagus ◽  
Submucosal Glands

We investigated the involvement of carbon monoxide (CO) in the innervation of the canine cervical esophagus and trachea by means of immunohistochemistry using an antiserum against heme oxygenase–2 (HO-2). We detected HO-2–immunoreactive nerve fibers around the blood vessels and submucosal glands of the esophagus and trachea. We found HO-2–immunoreactive neurons in ganglia in the trachea and in the myenteric plexus of the esophagus. These results suggest that CO is involved as a neurotransmitter in the innervation of the canine esophagus and trachea.

scholarly journals Nerve Fibers Containing Neuropeptide Y in the Cerebrovascular Bed: Immunocytochemistry, Radioimmunoassay, and Vasomotor Effects

1987 ◽  
Vol 7 (1) ◽  
pp. 45-57 ◽  
Author(s):  
L. Edvinsson ◽  
J. R. Copeland ◽  
P. C. Emson ◽  
J. McCulloch ◽  
R. Uddman
Keyword(s):  
Neuropeptide Y ◽  
Blood Vessels ◽  
Superior Cervical Ganglion ◽  
Cerebral Arteries ◽  
Nerve Fibers ◽  
Calcium Entry Blocker ◽  
Cervical Ganglion ◽  
Prostaglandin F ◽  
6 Hydroxydopamine

Perivascular nerve fibers containing neuropeptide Y (NPY)-like immunoreactivity were identified around cerebral blood vessels of human, cat, guinea pig, rat, and mouse. The major cerebral arteries were invested by dense plexuses; veins, small arteries, and arterioles were accompanied by few fibers. Removal of the superior cervical ganglion resulted in a reduction of NPY-like material in pial vessels and dura mater. Pretreatment with 6-hydroxydopamine or reserpine reduced the number of visible NPY fibers and the concentration of NPY in rat cerebral vessels. Sequential immuno-staining with antibodies toward dopamine-β-hydroxylase (DBH) (an enzyme involved in the synthesis of noradrenaline) and NPY revealed an identical localization of DBH and NPY in nerve cell bodies in the superior cervical ganglion and in perivascular fibers of pial blood vessels, suggesting their coexistence. Administration of NPY in vitro resulted in concentration-dependent contractions that were not modified by a sympathectomy. The contractions induced by noradrenaline, 5-hydroxytryptamine, and prostaglandin F2α and the dilator responses to calcitonin gene-related peptide were not modified by NPY in rat cerebral arteries. However, the constrictor response to NPY was reduced by 70% in the presence of the calcium entry blocker nifedipine, and abolished following incubation in a calcium-free buffer. These data suggest an interaction of NPY at a postsynaptic site, which for induction of contraction may open calcium channels in the sarcolemma of cerebral arteries.

Distribution of CGRP and TRPV2 in Human Paranasal Sinuses

2016 ◽  
Vol 203 (1) ◽  
pp. 55-64 ◽  
Author(s):  
Tadasu Sato ◽  
Nobuyuki Sasahara ◽  
Noriyuki Kanda ◽  
Yu Sasaki ◽  
Yu Yamaguma ◽  
...  
Keyword(s):  
Blood Vessels ◽  
Paranasal Sinuses ◽  
Transient Receptor Potential ◽  
Receptor Potential ◽  
Nerve Fibers ◽  
Ethmoid Sinus ◽  
Pgp 9.5 ◽  
Body Sizes ◽  
Transient Receptor ◽  
Sphenoid Sinuses

Immunohistochemistry for protein gene product 9.5 (PGP 9.5), calcitonin gene-related peptide (CGRP) and the transient receptor potential cation channel subfamily V member 2 (TRPV2) was performed on human paranasal sinuses. It was found that in the paranasal sinuses, mucous membranes contain PGP 9.5-immunoreactive (PGP 9.5-IR) nerve fibers. Such nerve fibers terminated around large blood vessels as fine varicosities. Isolated PGP 9.5-IR nerve fibers were scattered beneath the epithelium. Glandular tissues were also innervated by PGP 9.5-IR nerve fibers. These fibers were numerous in the maxillary and ethmoid sinuses, and relatively rare in the frontal and sphenoid sinuses. CGRP-IR nerve fibers were common in the maxillary sinus whereas TRPV2-IR nerve fibers were abundant in the ethmoid sinus. They were located around large blood vessels in the lamina propria. Many subepithelial nerve fibers contained TRPV2 immunoreactivity in the ethmoid sinus. CGRP- and TRPV2-IR nerve fibers were very infrequent in the frontal and sphenoid sinuses. In the human trigeminal ganglion (TG), sensory neurons contained CGRP or TRPV2 immunoreactivity. CGRP-IR TG neurons were more common than TRPV2-IR TG neurons. CGRP-IR TG neurons were of various cell body sizes, whereas TRPV2-IR TG neurons were mostly medium-to-large. In addition, human spinal and principal trigeminal sensory nuclei contained abundant CGRP- and TRPV2-IR varicosities. This study indicates that CGRP- and TRPV2-containing TG neurons probably innervate the paranasal sinus mucosae, and project into spinal and principal trigeminal sensory nuclei.

Sign in / Sign up

Export Citation Format

Share Document