Cerebral potentials evoked by rectal distention in humans

V LOENING-BAUCKE; T YAMADA

doi:10.1016/0168-5597(93)90033-l

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Journal article

Cerebral potentials evoked by rectal distention in humans

V LOENING-BAUCKE and T YAMADA

Electroencephalography and clinical neurophysiology, Vol.88(6), pp.447-452

1993

DOI: 10.1016/0168-5597(93)90033-l

PMID: 7694830

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Abstract

he afferent pathways from the rectum can be stimulated and studied after mechanical distention of the rectum. We studied the rectum-brain axis in 24 healthy young adults. The rectum was stimulated with a rectal balloon using inflation volumes of 10 ml and 30 ml air at a stimulation frequency of 0.167 Hz. Additional studies were carried out with 20 ml distention volumes, random stimulation frequency, and stimulation rates of 0.08 Hz and 0.017 Hz. We found two different cortical EPs. An early onset EP was present in 21 of the 24 subjects. P1 latency shortened significantly with increasing distention volumes, but peak amplitudes did not change significantly with larger distention volumes. A late onset EP was present in all subjects with NI latency of 210 +/- 15 msec, PI latency of 316 +/- 24 msec, and NII latency of 444 +/- 34 msec. The different EPs could be due to stimulation of two different visceral afferent pathways which are present in the same individual, due to stimulation of two different fiber populations or due to simultaneous stimulation of afferents in surrounding structures. EP recording after rectal stimulation might be useful in future studies of patients with abnormal rectal sensation.

Nervous System

Fundamental and applied biological sciences. Psychology

Vertebrates: nervous system and sense organs

Electrodiagnosis. Electric activity recording

Investigative techniques, diagnostic techniques (general aspects)

Biological and medical sciences

Somesthesis and somesthetic pathways (proprioception, exteroception, nociception); interoception; electrolocation. Sensory receptors

Medical sciences

Details

Title: Subtitle: Cerebral potentials evoked by rectal distention in humans
Creators: V LOENING-BAUCKE - Univ. Iowa hosp. clin., dep. pediatrics, Iowa City IA 52242, United States
T YAMADA - Univ. Iowa hosp. clin., dep. pediatrics, Iowa City IA 52242, United States
Resource Type: Journal article
Publication Details: Electroencephalography and clinical neurophysiology, Vol.88(6), pp.447-452
Publisher: Elsevier; Shannon; Amsterdam
DOI: 10.1016/0168-5597(93)90033-l
PMID: 7694830
ISSN: 0013-4694
eISSN: 1872-6380
Language: English
Date published: 1993
Academic Unit: Neurology; Stead Family Department of Pediatrics
Record Identifier: 9984020873502771

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