Feeding behavior in mammals: corticobulbar projection is reorganized during conversion from sucking to chewing

Iriki, Atsushi; Nozaki, Shuichi; Nakamura, Yoshio

doi:10.1016/0165-3806(88)90217-9

Cited by 79 publications

(41 citation statements)

References 7 publications

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“…17,18 This ororhythmic motor behavior is primarily controlled by the suck central pattern generator (sCPG), which includes bilateral internuncial circuits within the pontine and medullary reticular formation. 19,20 The minimal circuitry for ororhythmic activity resides between the trigeminal motor nucleus and the facial nucleus in the brainstem. 19 Thus, suck represents a complex sensorimotor behavior that can provide valuable insights into the integrity of the central nervous system.…”

Section: Introductionmentioning

confidence: 99%

Synthetic orocutaneous stimulation entrains preterm infants with feeding difficulties to suck

et al. 2008

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Background: Prematurity can disrupt the development of a specialized neural circuit known as suck central pattern generator (sCPG), which often leads to poor feeding skills. The extent to which suck can be entrained using a synthetically patterned orocutaneous input to promote its development in preterm infants who lack a functional suck is unknown.Objective: To evaluate the effects of a new motorized 'pulsating' pacifier capable of entraining the sCPG in tube-fed premature infants who lack a functional suck and exhibit feeding disorders.Methods: Prospective cohort study of 31 preterm infants assigned to either the oral patterned entrainment intervention (study) or non-treated (controls) group, matched by gestational age, birth weight, oxygen supplementation history and oral feed status. Study infants received a daily regimen of orocutaneous pulse trains through a pneumatically controlled silicone pacifier concurrent with gavage feeds.Results: The patterned orocutaneous stimulus was highly effective in accelerating the development of non-nutritive suck (NNS) in preterm infants. A repeated-measure multivariate analysis of covariance revealed significant increases in minute rates for total oral compressions, NNS bursts, and NNS cycles, suck cycles per burst, and the ratiometric measure of NNS cycles as a percentage of total ororhythmic output. Moreover, study infants also manifest significantly greater success at achieving oral feeds, surpassing their control counterparts by a factor of 3.1 Â (72.8% daily oral feed versus 23.3% daily oral feed, respectively).Conclusion: Functional expression of the sCPG among preterm infants who lack an organized suck can be induced through the delivery of synthetically patterned orocutaneous pulse trains. The rapid emergence of NNS in treated infants is accompanied by a significant increase in the proportion of nutrient taken orally.

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Section: Introductionmentioning

confidence: 99%

Synthetic orocutaneous stimulation entrains preterm infants with feeding difficulties to suck

et al. 2008

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“…The above findings (Iriki et al, 1988) are interesting, given that guinea pigs used in the experiments, are born with erupted teeth, which show wear from intra-uterine grinding. However, neonatal guinea pigs do not feed or chew until weaning, indicating that tooth eruption is not sufficient to produce chewing.…”

Section: Tooth Eruption and The Transition From Suckling To Chewingmentioning

confidence: 92%

“…There is also debate among scientists about the relationship between suckling and mastication. Iriki, et al (Iriki et al, 1988) have demonstrated that suckling and mastication www.intechopen.com are represented at anatomically distinct cortical sites (Fig. 4).…”

Section: Licking and Sucklingmentioning

confidence: 99%

Mammalian Oral Rhythms and Motor Control

Gerstner¹,

Madhavan²,

Crane³

2011

Biomechanics in Applications

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“…This suggests that motor commands to these masticatory muscles change in parallel with the postnatal development of the orofacial musculoskeletal structures. Since the TMNs provide the nal motor output to jaw-closing and jaw-opening muscles 29,30 , the common opinion in the eld is that the input-output properties of these motoneurons change in line with the alteration of motor commands 4,19,31 .…”

Section: Postnatal Development Of Synaptic Transmission From Premotormentioning

confidence: 99%

“…This neural architecture indicates that the neural circuits including premotor neurons and motoneurons are involved in controlling masticatory muscle activities via ascending and descending inputs during jaw movement. The properties of these neural circuits differ among postnatal periods 19 because feeding behavior of mammals changes substantially from suckling to chewing during development, which is accompanied by the formation of the oral and facial musculoskeletal system during the early postnatal period.…”

Section: Introductionmentioning

confidence: 99%

Central Neural Mechanisms Involved in the Control of Jaw Movement during Postnatal Development

Nakamura

Nagata

Nonaka

et al. 2017

Showa Univ J Med Sci

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: Mechanisms responsible for controlling masticatory muscle activity during suckling and mastication initiate in the brain. Premotor neurons situated in the brainstem transmit masticatory motor commands to the jaw-closing and jaw-opening motoneurons, which in turn activate the masticatory muscles. The premotor neurons receive inputs from multiple sources such as the orofacial sensory organs, the cerebral cortex, and the central pattern generator in the brainstem. These neural circuits might be important for controlling jaw movement, although their properties in this regard are likely to be altered in postnatal development as the oral motor behavior of mammals shifts significantly from suckling to chewing during the early postnatal period. This timing of jaw movement development mimics that of the orofacial musculoskeletal apparatus. The current article reviews ndings on local neural circuits of trigeminal motoneurons and premotor neurons, during early development in rats. We describe findings from electrophysiological recordings, optical imaging with voltage-sensitive dyes, calcium imaging, and laser photolysis of caged glutamate. We also review research into the subtypes of premotor neurons in the supratrigeminal region SupV that differ in their electrophysiological properties and possess different morphological characteristics. We further describe how trigeminal motoneurons receive glutamatergic, glycinergic, and GABAergic inputs from the SupV and the reticular formation dorsal to the facial nucleus. Finally, we discuss how these synaptic and intrinsic membrane properties change in postnatal development. Taken together, the ndings reviewed herein suggest that these neural circuits are important in diverse oral motor behaviors, and that their postnatal changes are involved in the transition from suckling to mastication functions.

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Feeding behavior in mammals: corticobulbar projection is reorganized during conversion from sucking to chewing

Cited by 79 publications

References 7 publications

Synthetic orocutaneous stimulation entrains preterm infants with feeding difficulties to suck

Synthetic orocutaneous stimulation entrains preterm infants with feeding difficulties to suck

Mammalian Oral Rhythms and Motor Control

Central Neural Mechanisms Involved in the Control of Jaw Movement during Postnatal Development

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