Brainstem microstimulation differentially inhibits pudendal motoneuron reflex inputs.

Abstract:

:Sensory information from the genitourinary tract is transmitted to perineal muscle reflex circuits in the spinal cord and to the medullary reticular formation (MRF). This is the first report of a functional descending connection between neurons in the MRF and sensory inputs of the pudendal motoneuron reflex circuitry. In anesthetized rats, microstimulation of the MRF produced a decrease in amplitude and increase in latency of pudendal motoneuron reflex discharges (PMRD) elicited by stimulation of the dorsal nerve of the penis. No effects on pelvic nerve-elicited PMRD were found. The most robust reflex depression was observed when the lateral paragigantocellular reticular nucleus was microstimulated bilaterally. Reproductive abnormalities that occur following severe spinal cord injury probably result from disruption of these descending connections.

journal_name

Neuroreport

journal_title

Neuroreport

authors

Johnson RD,Hubscher CH

doi

10.1097/00001756-199801260-00030

subject

Has Abstract

pub_date

1998-01-26 00:00:00

pages

341-5

issue

2

eissn

0959-4965

issn

1473-558X

journal_volume

9

pub_type

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