Abstract
Each cycle of rhythmic straining evoked through the reflex center in th Kölliker-Fuse nucleus by stimulation of pelvic afferents in decerebrate dogs usually began in early expiration. During the rhythmic straining cycle, postinspiratory discharges of the phrenic nerve increased simultaneously with a burst of discharges of the nerves innervating the rectus abdominis and adductors of the glottis. While about half of the bulbar expiratory units discharged concurrently with the rhythmic straining, almost none of the inspiratory units examined did so. Nearly all expiratory bulbospinal units discharged concurrently, but none of the inspiratory bulbospinal units did so. These results show that expiratory neurons in the caudal bulb relay commands for rhythmic straining from the pontine reflex center to motor neurons of expiratory muscles, but that bulbar inspiratory neurons do not relay the commands to inspiratory motor neurons. Discharges concurrent with rhythmic straining were also evoked in all 4 postinspiratory units of the ventral group. 3 every early onset expiratory units and all 9 inspiratory-expiratory units of the dorsal group. Possible roles played by these respiratory neurons in the organization of rhythmic straining were discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 157-166 |
| Number of pages | 10 |
| Journal | Brain Research |
| Volume | 449 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - May 24 1988 |
| Externally published | Yes |
Fingerprint
Keywords
- Bulbar respiratory neuron
- Defecation
- Kölliker-Fuse (K-F) nucleus
- Micturition
- Parturition
- Pelvic nerve
- Respiration
- Straining
ASJC Scopus subject areas
- Developmental Biology
- Molecular Biology
- Clinical Neurology
- Neuroscience(all)
Cite this
Discharges of bulbar respiratory neurons during rhythmic straining evoked by activation of pelvic afferent fibers in dogs. / Fukuda, Hiroyuki; Fukai, Kiyoko.
In: Brain Research, Vol. 449, No. 1-2, 24.05.1988, p. 157-166.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Discharges of bulbar respiratory neurons during rhythmic straining evoked by activation of pelvic afferent fibers in dogs
AU - Fukuda, Hiroyuki
AU - Fukai, Kiyoko
PY - 1988/5/24
Y1 - 1988/5/24
N2 - Each cycle of rhythmic straining evoked through the reflex center in th Kölliker-Fuse nucleus by stimulation of pelvic afferents in decerebrate dogs usually began in early expiration. During the rhythmic straining cycle, postinspiratory discharges of the phrenic nerve increased simultaneously with a burst of discharges of the nerves innervating the rectus abdominis and adductors of the glottis. While about half of the bulbar expiratory units discharged concurrently with the rhythmic straining, almost none of the inspiratory units examined did so. Nearly all expiratory bulbospinal units discharged concurrently, but none of the inspiratory bulbospinal units did so. These results show that expiratory neurons in the caudal bulb relay commands for rhythmic straining from the pontine reflex center to motor neurons of expiratory muscles, but that bulbar inspiratory neurons do not relay the commands to inspiratory motor neurons. Discharges concurrent with rhythmic straining were also evoked in all 4 postinspiratory units of the ventral group. 3 every early onset expiratory units and all 9 inspiratory-expiratory units of the dorsal group. Possible roles played by these respiratory neurons in the organization of rhythmic straining were discussed.
AB - Each cycle of rhythmic straining evoked through the reflex center in th Kölliker-Fuse nucleus by stimulation of pelvic afferents in decerebrate dogs usually began in early expiration. During the rhythmic straining cycle, postinspiratory discharges of the phrenic nerve increased simultaneously with a burst of discharges of the nerves innervating the rectus abdominis and adductors of the glottis. While about half of the bulbar expiratory units discharged concurrently with the rhythmic straining, almost none of the inspiratory units examined did so. Nearly all expiratory bulbospinal units discharged concurrently, but none of the inspiratory bulbospinal units did so. These results show that expiratory neurons in the caudal bulb relay commands for rhythmic straining from the pontine reflex center to motor neurons of expiratory muscles, but that bulbar inspiratory neurons do not relay the commands to inspiratory motor neurons. Discharges concurrent with rhythmic straining were also evoked in all 4 postinspiratory units of the ventral group. 3 every early onset expiratory units and all 9 inspiratory-expiratory units of the dorsal group. Possible roles played by these respiratory neurons in the organization of rhythmic straining were discussed.
KW - Bulbar respiratory neuron
KW - Defecation
KW - Kölliker-Fuse (K-F) nucleus
KW - Micturition
KW - Parturition
KW - Pelvic nerve
KW - Respiration
KW - Straining
UR - http://www.scopus.com/inward/record.url?scp=0023908156&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0023908156&partnerID=8YFLogxK
U2 - 10.1016/0006-8993(88)91034-7
DO - 10.1016/0006-8993(88)91034-7
M3 - Article
C2 - 3395844
AN - SCOPUS:0023908156
VL - 449
SP - 157
EP - 166
JO - Brain Research
JF - Brain Research
SN - 0006-8993
IS - 1-2
ER -