YOUNG INVESTIGATORS

2013 ◽  
Vol 17 (08) ◽  
pp. 53-56
Author(s):  
Geraldine Lai Dunlin ◽  
Ong Sher Lyn ◽  
See Jing Rou ◽  
Lily Yani ◽  
Lim Jia Min
Keyword(s):  
Platelet Aggregation ◽  
Blood Vessels ◽  
Blood Supply ◽  
Heart Attack ◽  
The Brain

P latelets have an important role to play in the clotting of blood. When platelet aggregation is not under control, excessive aggregation occurs, leading to theblockage of the blood vessels. Reduction in blood supply or the dislodging of clots from their site of origin may damage vital organs like the brain or heart; leading to a stroke or heart attack.

scholarly journals An Electro-Optical Method for Differential Diagnosis of Pathologies of Blood Supply to the Brain

Biomeditsina ◽  
2021 ◽  
Vol 17 (3) ◽  
pp. 68-73
Author(s):  
A. A. Nikolaev ◽  
N. N. Karkischenko ◽  
Yu. A. Chudina ◽  
D. B. Chaivanov ◽  
A. A. Vartanov
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Healthy Volunteers ◽  
Blood Vessels ◽  
Blood Supply ◽  
Experimental Studies ◽  
Significance Level ◽  
Cerebral Blood Supply ◽  
Simplified Method ◽  
The Brain

This work is devoted to the development of a new simplified method for express diagnostics of cerebral blood supply disorders of a vertebrogenic and non-vertebral nature based on electrocardiogram and photoplethysmogram data. The research was conducted using the example of vertebral artery syndrome in osteochondrosis of the cervical spine and somatoform dysfunction of the autonomic nervous system, respectively. Several experimental studies into the dynamics of heart rate variability and differential indicators of the coordinated work of the heart and blood vessels were carried out according to the data of electrocardiography and photoplethysmography. Three experimental groups included healthy volunteers and volunteers with cerebral blood supply disorders connected with either the loss of plasticity and narrowing of brain blood vessels or their mechanical squeezing. According to the research results, statistically significant (with a significance level of less than 0.05) differences by a number of indicators were revealed between the experimental groups. A conventional discriminant analysis of the indicators of the coordinated work of the heart and blood vessels was carried out for all experimental groups in order to determine criteria for differentiating people with vertebrogenic disorders, non-vertebral disorders and healthy volunteers. It is concluded that three variables can be used for such differentiation, each of which describes the coordinated work of the heart and blood vessels in a specific way.

Clinical evaluation of Nasya Karma and Vatagajankusha Rasa effect in the management of Pakshaghata

2019 ◽  
Vol 4 (04) ◽  
Author(s):  
Kuldeep . ◽  
A. S. Prashanth ◽  
S. G. Chavan
Keyword(s):  
Blood Vessels ◽  
Brain Tissue ◽  
Blood Supply ◽  
Clinical Evaluation ◽  
The Other ◽  
Cerebral Blood Vessels ◽  
Modern Era ◽  
The Brain

Vata Vyadhi is considered one among the Ashta Maha Gada as told by Acharya’s. Out of all Nanatmaja Vata Vyadhis, the disease Pakshaghata is considered superior among the other Vataja disorders. In modern era, the Lakshana’s of Pakshaghata is closely resembles the disease Hemiplegia. In Hemiplegia, symptoms appears due to the Ischemia of Brain tissue which is an end result of improper blood supply to the brain either due to thrombus, embolism or may be due to rupture of any cerebral blood vessels. Acharya Bhela, has considered Pakshaghata as one among the Asthi Majjagata Roga’s. Acharya Sushruta also states that, the Mastulunga Majja is nothing but it is Majjadhara Kala. So, here an attempt has been made to evaluate the efficacy of Brimhana Nasya along with Shamanoushadi’s for the management of Pakashaghata.

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.

Perivascular (Virchow–Robin) spaces

2021 ◽  
pp. 86-89
Keyword(s):  
Blood Vessels ◽  
Shape Change ◽  
Lymphatic Drainage ◽  
Brain Regions ◽  
Mechanical Trauma ◽  
Normal Brain ◽  
Perivascular Spaces ◽  
Mr Images ◽  
Lenticulostriate Artery ◽  
The Brain

Perivascular spaces; also known as the Virchow-Robin Spaces, they are pleurally lined, interstitial fluid-filled areas that surround certain blood vessels in various organs, especially the perforating arteries in the brain, with an immunological function. Dilated perivascular spaces are divided into three types. The first of these is on the lenticulostriate artery, the second is in the cortex following the path of the medullary artery, and the third is in the midbrain. Perivascular spaces can be detected as areas of dilatation on MR images. Although a limited number of perivascular spaces can be seen in a normal brain, the increase in the number of these spaces has been associated with the incidence of various neurodegenerative diseases. Different theories have been suggested about the tendency of the perivascular spaces to expand. Current theories include mechanical trauma due to cerebrospinal fluid pulsing, elongation of penetrating blood vessels, unusual vascular permeability, and increased fluid exudation. In addition, the brain tissue atrophy that occurs with aging; It is thought to contribute to the widening of perivascular spaces by causing shrinkage of arteries, altered arterial wall permeability, obstruction of lymphatic drainage pathways and vascular demyelination. It is assumed that the clinical significance of the dilation tendencies of the perivascular spaces is based on shape change rather than size. These spaces have been mostly observed in brain regions such as corpus callosum, cingulate gyrus, dentate nucleus, substantia nigra and various arterial basins including lenticulostriate artery and mesencephalothalamic artery. In conclusion, when sections are taken on MR imaging, it is possible that perivascular spaces may be confused with microvascular diseases and some neurodegenerative changes. In addition, perivascular spaces can be seen without pathological significance. Therefore, it would be appropriate to investigate the etiological relationship by evaluating the radiological findings and clinical picture together.

Two Cases of Atheroma of the Blood Vessels at the Base of the Brain, with Remarks upon the Symptoms, Diagnosis, Prognosis, and Pathological Condition in that Affection

1870 ◽  
Vol 16 (73) ◽  
pp. 52-58
Author(s):  
J. T. Sabben
Keyword(s):  
Blood Vessels ◽  
Pathological Condition ◽  
Cerebral Arteries ◽  
General Paralysis ◽  
Brain Substance ◽  
The Brain

In publishing the following cases, recently under my charge, of mental derangement dependent upon atheromatous deposit in the coats of the larger cerebral arteries, without any apparent disease of the brain substance, I desire, if possible, to define the symptoms of that condition during life, so as to enable them to be distinguished from those of general paralysis, with which I believe them often to be confused.

scholarly journals Meningeal Tumors Induced in Calves with the Bovine Cutaneous Papilloma Virus

1969 ◽  
Vol 6 (2) ◽  
pp. 135-145 ◽  
Author(s):  
D. F. Brobst ◽  
G. C. Dulac
Keyword(s):  
Blood Vessels ◽  
Viral Antigen ◽  
Papilloma Virus ◽  
Meningeal Tumors ◽  
The Brain

Fibromatous tumors were induced in the meninges of calves by inoculating the meninges with a suspension of bovine cutaneous papillomas or by implanting bovine cutaneous papillomas into the brain. Meningeal tumors were observed to occur as early as 20 days after inoculation. Meningeal tumors from calves killed 90 and 145 days after inoculation extended into the brain along the course of blood vessels. Metastasis, however, was not observed. Evidence that the induced meningeal tumors contained viral antigen was lacking.

Angiography in the living dolphin and observations on blood supply to the brain

1968 ◽  
Vol 214 (6) ◽  
pp. 1225-1249 ◽  
Author(s):  
M Viamonte ◽  
PJ Morgane ◽  
RE Galliano ◽  
EL Nagel ◽  
WL McFarland
Keyword(s):  
Blood Supply ◽  
The Brain

AN ALGORITHM FOR CANCER RECOGNITION OF ULTRASOUND IMAGES

2000 ◽  
Vol 09 (02) ◽  
pp. 265-276 ◽  
Author(s):  
E. A. YFANTIS ◽  
T. LAZARAKIS ◽  
G. BEBIS ◽  
G. M. GALLITANO
Keyword(s):  
Frequency Domain ◽  
Blood Vessels ◽  
Autocorrelation Function ◽  
Blood Supply ◽  
Normal Tissue ◽  
Supply System ◽  
Ultrasound Images ◽  
Preliminary Results ◽  
Ultrasound Signal ◽  
Frequency Domain Properties

An algorithm of cancer recognition of ultrasound images is developed in this paper. As we pointed out in our previous work, in order for cancer to survive it develops its own blood supply system, which is different than the supply system of normal tissue. The velocity of the blood flowing through the cancerous blood vessels is different than the velocity of the blood flowing through blood vessels of normal tissue. Due to this fact the ultrasound signal is absorbed differently in the cancerous areas than in the normal tissue areas. The energy of the signal, the continuity of the signal, the autocorrelation function and frequency domain properties are different in the normal tissue than in cancerous tissue. All of these indicators are weighted here for the purpose of classifying the image of the tissue as being cancerous or non cancerous. Preliminary results based on limited number of ultrasound images show that our method has the ability to recognize cancer in ultrasound images.

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