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Motor function of anorectum and pelvic floor musculature

Handbook of Physiology, The Gastrointestinal System, Motility and Circulation

  1. Jacob Krier

Published Online: 1 JAN 2011

DOI: 10.1002/cphy.cp060127

Comprehensive Physiology

Comprehensive Physiology

How to Cite

Krier, J. 2011. Motor function of anorectum and pelvic floor musculature. Comprehensive Physiology. 1025–1053.

Author Information

  1. Department of Physiology, Michigan State University, East Lansing, Michigan

Publication History

  1. Published Online: 1 JAN 2011

Abstract

The sections in this article are:

  • 1
    Autonomic Innervation
    • 1.1
      Lumbar Sympathetic Innervation to Colon, Rectum, and Internal Anal Sphincter
    • 1.2
      Sacral Parasympathetic Innervation to Colon, Rectum, and Internal Anal Sphincter
    • 1.3
      Sacral Afferent Fibers
  • 2
    Somatic Innervation to Skeletal Muscle of Pelvic Floor
    • 2.1
      Efferent Innervation
    • 2.2
      Afferent Innervation
  • 3
    Peptides
    • 3.1
      Vasoactive Intestinal-like Peptide
    • 3.2
      Enkephalins
    • 3.3
      Substance P-Like Peptide
    • 3.4
      Somatostatin-like Peptide
  • 4
    Motor Activity of Rectum and Internal Anal Sphincter
    • 4.1
      General and Historical Considerations
    • 4.2
      Intraluminal Pressure Recordings
    • 4.3
      Electrical Activity of Rectum and Internal Anal Sphincter
  • 5
    Motor Activity of Skeletal Muscle of Pelvic Floor
    • 5.1
      Electromyography
    • 5.2
      Histochemical Studies
    • 5.3
      Force Measurements
  • 6
    Influence of Intrinsic Gastrointestinal Nerves on Motor Activity of Internal Anal Sphincter
    • 6.1
      Cholinergic Motor Neurons
    • 6.2
      Noncholinergic, Nonadrenergic Neurons
    • 6.3
      Rectoanal Reflexes
    • 6.4
      Vesicoanal Reflexes
  • 7
    Influence of Lumbar Sympathetic Nerves on Motor Activity of Colon, Rectum, and Internal Anal Sphincter
    • 7.1
      Effect of Electrical Stimulation of Lumbar Sympathetic Nerves
    • 7.2
      Effect of Interruption of Lumbar Sympathetic Pathways to Colon, Rectum, and Internal Anal Sphincter
  • 8
    Influence of Sacral Autonomic Nerves on Motor Activity of Internal Anal Sphincter
    • 8.1
      Effect of Electrical Stimulation of Sacral Parasympathetic Nerves
    • 8.2
      Cholinergic Agonists
  • 9
    Influence of Sacral Autonomic Nerves on Motor Activity of Colon and Rectum
    • 9.1
      Effect of Electrical Stimulation of Sacral Nerves
    • 9.2
      Cholinergic Responses
    • 9.3
      Noncholinergic, Nonadrenergic Responses
  • 10
    Influence of Somatic Nerves on Motor Activity of Skeletal Muscle of Pelvic Floor
    • 10.1
      Somatic Reflexes
    • 10.2
      Supraspinal Pathways
    • 10.3
      Viscerosomatic Reflexes
    • 10.4
      Flexor Reflexes
  • 11
    Defecation
    • 11.1
      General Considerations
    • 11.2
      Visceral and Somatic Afferent Fibers
    • 11.3
      Sacral Parasympathetic Efferent Fibers
    • 11.4
      Relationship Between Eating and Colonic Motility
  • 12
    Motor Dysfunction of Colon, Anorectum, and Pelvic Floor Musculature
    • 12.1
      Muscle Dysfunction
    • 12.2
      Neurogenic Dysfunctions