Observations on the Diseases of the Rectum PDF Download
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Author: Thomas Blizard Curling
Publisher:
ISBN:
Category : Rectal Diseases
Languages : en
Pages : 190
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Book Description
Author: Thomas Blizard Curling
Publisher:
ISBN:
Category : Rectal Diseases
Languages : en
Pages : 190
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Book Description
Author: Thomas Blizard Curling
Publisher:
ISBN:
Category :
Languages : en
Pages : 160
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Author: Ebenezer David Silver
Publisher:
ISBN:
Category :
Languages : en
Pages : 190
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Book Description
Author: William Bodenhamer
Publisher:
ISBN:
Category : Anus
Languages : en
Pages : 294
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Author: Thomas COPELAND
Publisher:
ISBN:
Category :
Languages : en
Pages : 202
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Book Description
Author: Sushil K. Sarna
Publisher: Biota Publishing
ISBN: 1615041516
Category : Medical
Languages : en
Pages : 159
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Book Description
Three distinct types of contractions perform colonic motility functions. Rhythmic phasic contractions (RPCs) cause slow net distal propulsion with extensive mixing/turning over. Infrequently occurring giant migrating contractions (GMCs) produce mass movements. Tonic contractions aid RPCs in their motor function. The spatiotemporal patterns of these contractions differ markedly. The amplitude and distance of propagation of a GMC are several-fold larger than those of an RPC. The enteric neurons and smooth muscle cells are the core regulators of all three types of contractions. The regulation of contractions by these mechanisms is modifiable by extrinsic factors: CNS, autonomic neurons, hormones, inflammatory mediators, and stress mediators. Only the GMCs produce descending inhibition, which accommodates the large bolus being propelled without increasing muscle tone. The strong compression of the colon wall generates afferent signals that are below nociceptive threshold in healthy subjects. However, these signals become nociceptive; if the amplitudes of GMCs increase, afferent nerves become hypersensitive, or descending inhibition is impaired. The GMCs also provide the force for rapid propulsion of feces and descending inhibition to relax the internal anal sphincter during defecation. The dysregulation of GMCs is a major factor in colonic motility disorders: irritable bowel syndrome (IBS), inflammatory bowel disease (IBD), and diverticular disease (DD). Frequent mass movements by GMCs cause diarrhea in diarrhea predominant IBS, IBD, and DD, while a decrease in the frequency of GMCs causes constipation. The GMCs generate the afferent signals for intermittent short-lived episodes of abdominal cramping in these disorders. Epigenetic dysregulation due to adverse events in early life is one of the major factors in generating the symptoms of IBS in adulthood.
Author: Juerg Hodler
Publisher: Springer
ISBN: 3319750194
Category : Medical
Languages : en
Pages : 262
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Book Description
This open access book deals with imaging of the abdomen and pelvis, an area that has seen considerable advances over the past several years, driven by clinical as well as technological developments. The respective chapters, written by internationally respected experts in their fields, focus on imaging diagnosis and interventional therapies in abdominal and pelvic disease; they cover all relevant imaging modalities, including magnetic resonance imaging, computed tomography, and positron emission tomography. As such, the book offers a comprehensive review of the state of the art in imaging of the abdomen and pelvis. It will be of interest to general radiologists, radiology residents, interventional radiologists, and clinicians from other specialties who want to update their knowledge in this area.
Author: Thomas Copeland
Publisher:
ISBN:
Category :
Languages : en
Pages : 194
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Author: George Macartney Bushe
Publisher:
ISBN:
Category : Anus
Languages : en
Pages : 312
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 1136
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