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3 Hyperpolarizing preBotC neurons decreased inspiratory activity and initiated active expiration, ul
4 o effect on breathing at rest, or changes in inspiratory activity induced by hypoxia and hypercapnia;
5 e rise times tested did not alter the phasic inspiratory activity of glottal constrictor muscle durin
7 percentage of respiratory cycles with phasic inspiratory activity of glottal constrictor muscle was m
8 ut in vivo and in incomplete transmission of inspiratory activity to the hypoglossus motor nucleus.
9 uced active expiration at rest, but not when inspiratory activity was suppressed by hyperpolarizing p
10 hypoxia- and hypercapnia-induced increase in inspiratory activity, and when present, reducing expirat
13 lternating breaths, and responses in maximal inspiratory airflow (V(I)max) and inspiratory airflow li
15 broader set of multiscale variables, such as inspiratory airway dimension, expiratory air trapping, a
16 wall and that compensation for more negative inspiratory airway pressures generated during heavy exer
18 ynamics was analyzed beat-to-beat in the end-inspiratory and end-expiratory cycle comparing the IPPV
20 These values were measured during 15-sec end-inspiratory and end-expiratory ventilatory occlusions pe
22 ow measurements are not corrected for phasic inspiratory and expiratory changes in clinical practice.
23 We analyzed 8,034 subjects with complete inspiratory and expiratory computed tomographic data par
24 terquartile range, 0.4-0.53) yielding a mean inspiratory and expiratory concentrations of 0.79% (SD,
25 response mapping (PRM), a technique pairing inspiratory and expiratory CT images to define emphysema
30 trapping, airway size, and lung volume with inspiratory and expiratory X-ray computed tomography sca
31 nal area measurements were obtained from end-inspiratory and forced-expiratory CT images for the righ
32 es, it is reasonable to assume that negative inspiratory and positive expiratory intrathoracic pressu
33 Cs) in cat respiratory motoneurones (phrenic inspiratory and thoracic expiratory) was investigated by
37 red with PEEP of 16 cm H2O (mean [SEM] total inspiratory area, 52.0% [2.9%] vs 29.4% [4.3%], respecti
38 emotor excitatory drive, contributing to the inspiratory behavior of XII motoneurons, as well as a ke
39 h end-inspiratory and tidal lung stress (end-inspiratory: beta = -0.449; 95% CI, -0.664 to -0.234; p
41 ex (preBotC) generates the rhythm underlying inspiratory breathing movements and its core interneuron
42 ssed in distinct populations of pre-BotC and inspiratory bulbospinal ventral respiratory group (ibsVR
47 period ( approximately 2 s) after endogenous inspiratory bursts that precludes light-evoked bursts in
49 synaptic excitation is required to initiate inspiratory bursts, but whether excitatory synaptic mech
50 itic Ca(2+) accumulation frequently precedes inspiratory bursts, particularly at recording sites 50-3
51 cycle period nor the magnitude of endogenous inspiratory bursts-is sensitive to changes in extracellu
53 sociation of Th1/Th2 ratio with RV, FRC, and inspiratory capacity was attenuated after adjusting for
54 n of activity, slightly lower FEV1, FVC, and inspiratory capacity, and greater airway-wall thickening
55 growth and differentiation: vital capacity, inspiratory capacity, compliance, non-parenchymal lung v
57 moderate ILD or COPD with similarly reduced inspiratory capacity, the peak oxygen uptake, work rate,
59 tory valvular-to-annular ratio (P=0.026) and inspiratory change in right ventricular length-to-width
60 This work reveals the existence of a core inspiratory circuit in which V0 to V0 synapses enabling
62 a preBotC burst occurred, its high amplitude inspiratory component (I-burst) was preceded by a preins
64 atment was 55.6 +/- 2.5 (SD) min at a median inspiratory concentration of 44% (interquartile range, 3
65 th hypocapnia, however, had worse mechanical inspiratory constraints and higher dyspnea scores for a
66 o that observed during volitional breathing, inspiratory constraints, or in patients with defective a
67 m-selective positive end-expiratory pressure-inspiratory-CT (2.8 +/- 1.1 vs 0.6 +/- 0.3; p = 0.01); a
68 imum global positive end-expiratory pressure-inspiratory-CT and optimum-selective positive end-expira
69 ifference between end-expiratory and minimum-inspiratory diameter over the end-expiratory diameter.
71 In ILD and COPD, descriptors alluding to inspiratory difficulty were selected more frequently, wi
72 arge was nearly abolished, whereas laryngeal inspiratory discharge was increased disproportionally.
73 we found that, during central apnoeas, post-inspiratory drive (adductor motor) to the upper airways
74 g pathway in XII motoneurones that modulates inspiratory drive currents and plasticity of XII motoneu
75 lated rhythm, hypoglossal (XII) motoneuronal inspiratory drive currents and respiratory-related XII n
76 dual capacity for potentiating AMPA-mediated inspiratory drive to XII MNs that might be applied to th
77 ow amplitude inspiration due to loss of post-inspiratory drive) that was rapidly reversed by the opio
79 y peptide to PKG (PKGI) increased endogenous inspiratory-drive currents and exogenous AMPA-induced cu
80 tion increased tidal volume without altering inspiratory duration, whereas expiratory-phase photoinhi
81 ry-modulated with peak discharge in the late inspiratory/early expiratory phase and this activity was
82 he results show that, per unit pressure, the inspiratory effect of the diaphragmatic force on the low
84 cure bilaterally coordinated contractions of inspiratory effector muscles required for efficient brea
85 multiple physiologic effects including less inspiratory effort and improved lung volume and complian
86 ed in large decrement, approximately 96%, in inspiratory effort compared with spontaneously breathing
87 index was also used to measure the patient's inspiratory effort from Eadi without esophageal pressure
88 ilatory support to maintain normal levels of inspiratory effort may prevent changes in diaphragm conf
92 ever, variable pressure support yielded less inspiratory effort than proportional assist ventilation
93 ach phase, we measured arterial blood gases, inspiratory effort, and work of breathing by esophageal
94 assess the effects of HFNC on gas exchange, inspiratory effort, minute ventilation, end-expiratory l
97 e of 0 cm H2O and the other targeting an end-inspiratory elastance-based transpulmonary pressure of 2
98 e of 0 cm H2O and the other targeting an end-inspiratory elastance-based transpulmonary pressure of 2
99 ry pressure of 0 cm H2O and targeting an end-inspiratory elastance-based transpulmonary pressure of 2
102 ssion in Dbx1 preBotC neurons influences the inspiratory-expiratory phase transition during respirato
103 atory synaptic mechanisms also contribute to inspiratory-expiratory phase transition is unknown.
105 rametric response mapping analysis of paired inspiratory/expiratory CTs to identify functional small
108 onsive preBotC neurons had preinspiratory or inspiratory firing patterns associated with excitatory e
110 pecific immunoglobulin levels and peak nasal inspiratory flow (PNIF) were also measured (all measures
115 on cohort correlated with drop in peak nasal inspiratory flow (Spearman's r = 0.314, P = 0.034), and
116 e were associated with increases in VI, mean inspiratory flow (Vt/Ti) and tonic and phasic components
117 , duty cycle >0.41 increased mean expiratory-inspiratory flow bias from -4.1 +/- 4.6 to 7.9 +/- 5.9 L
118 H2O and TITTOT to achieve a mean expiratory-inspiratory flow bias of 10 L/min (treatment); 3) in Tre
121 ntilation (VI)(P </= 0.01) and 251% for mean inspiratory flow rate (VT /TI ) (P </= 0.05) when the CB
125 ts normalized Penh values and increased peak inspiratory flow, leading to decreased inspiration times
126 y, airflow and resistance, mainly peak nasal inspiratory flow, rhinomanometry and acoustic rhinometry
128 sal Outcome Test (SNOT20) scores, peak nasal inspiratory flows, Asthma Control Questionnaire scores,
130 e P2Y1 receptor-mediated increase in fictive inspiratory frequency involves Ca(2+) recruitment from i
133 ut, stroke volume variation and, with use of inspiratory hold maneuvers, mean systemic filling pressu
135 so with axon collaterals to areas containing inspiratory hypoglossal (XII) premotoneurons and motoneu
137 by active compression-decompression CPR, an inspiratory impedance threshold device (ITD), and abdomi
142 iously reported the development of an active inspiratory laryngeal narrowing against ventilator insuf
144 sure rise time or a low PaCO2 level promotes inspiratory laryngeal narrowing observed in nasal pressu
147 cle and ventilatory pump), during Ex plus an inspiratory load of 12.8 +/- 1.5 cm water, and during Ex
150 , the COPD group failed to increase peak end-inspiratory lung volume and had a significantly smaller
153 nclude that there is a population of preBotC inspiratory-modulated glycinergic, presumably inhibitory
154 C1 neurons play a key role in regulating inspiratory modulation of sympathetic activity and arter
155 of V0s results in left-right desynchronized inspiratory motor commands in reduced brain preparations
156 hythmic preBotC activity sufficient to drive inspiratory motor output or increased chemosensory drive
157 ich are glutamatergic, decreased ipsilateral inspiratory motor output without affecting frequency.
159 Prostaglandin E2 (PGE2) augments distinct inspiratory motor patterns, generated within the preBotz
163 essments included exercise duration, surface inspiratory muscle EMG, Spo(2), transcutaneous Pco(2), a
165 against mechanical constraints or with weak inspiratory muscle, and in patients with defective medul
166 eads to atrophy and dysfunction of the major inspiratory muscle, the diaphragm, contributing to venti
167 ous methods of electrical stimulation of the inspiratory muscles, high frequency spinal cord stimulat
171 uring hypoxia and acts via P2Y1 receptors on inspiratory neurons (and/or glia) to evoke Ca(2+) releas
172 of the preBotC inspiratory network, preBotC inspiratory neurons and cultured preBotC glia to puriner
174 tion if they acted primarily to inhibit post-inspiratory neurons and thereby release inspiration neur
175 ablished by single-cell RT-PCR that pre-BotC inspiratory neurons express TASK-1 and in some cases als
176 een described, but little is known regarding inspiratory neurons expressing pacemaker properties at e
177 The amplitude of evoked EPSPs was smaller in inspiratory neurons from alpha(1A)(-)/(-) mice compared
180 In current clamp recordings obtained from inspiratory neurons of the preBotC, we found an increase
181 ts in whole cell voltage clamp recordings of inspiratory neurons revealed no changes in inhibitory or
184 d during the last 5 seconds of 15-second end-inspiratory occlusion and end-expiratory occlusion and a
186 tigated whether adding the effects of an end-inspiratory occlusion and of an end-expiratory occlusion
187 % +/- 1%, respectively; p < 0.0001), and end-inspiratory occlusion decreased velocity-time integral m
188 A 15-second end-expiratory occlusion and end-inspiratory occlusion, separated by 1 minute, followed b
189 neurons, photoresponsive preBotC neurons had inspiratory or postinspiratory firing patterns associate
190 tation (iPMF), a rebound increase in phrenic inspiratory output observed once respiratory neural driv
191 (2) inactivity-induced increases in phrenic inspiratory output require local PKCzeta/iota activity t
194 The respective proportion of the different inspiratory pacemaker subtypes changes during prenatal d
195 de that glycinergic preBotC neurons modulate inspiratory pattern and are important for reflex apneas,
196 le of pre-BotC inhibitory neurons in shaping inspiratory pattern as well as coordinating inspiratory
198 airway minus esophageal) pressure during end-inspiratory pause of a tidal breath and tidal stress as
202 hibition did not affect the amplitude of the inspiratory peak, expiratory trough or expiratory peak o
203 pontine Kolliker-Fuse nucleus, removed post-inspiratory peaks in efferent cardiac vagal activity and
207 al discharge, which continued throughout the inspiratory phase, while at the same time attenuating di
208 lateral PAG converted the pre-I neurons into inspiratory phase-spanning cells, resulting in inspirato
214 1B); low tidal volume (1A) and limitation of inspiratory plateau pressure (1B) for acute respiratory
216 al-ventilation strategies that use lower end-inspiratory (plateau) airway pressures, lower tidal volu
217 The median home ventilator settings were an inspiratory positive airway pressure of 24 (IQR, 22-26)
218 115 (83%) of these patients had not received inspiratory positive pressure ventilation (IPPV) despite
219 to substance P, putatively corresponding to inspiratory pre-Botzinger complex (preBotC) neurons.
220 reBotC Dbx1(+) neurons are rhythmogenic, (2) inspiratory preBotC Dbx1(+) and SST(+) neurons primarily
221 ragm muscle in the mouse, that the principal inspiratory premotor neurons share V0 identity with, and
222 reduced capacity of the diaphragm to produce inspiratory pressure (diaphragm dysfunction) is frequent
223 m, and manuvacuometric measurements [maximal inspiratory pressure (MIP) and maximal expiratory pressu
224 24 hrs later by mechanical ventilation (peak inspiratory pressure 22 cm H(2)O and positive end-expira
225 tive end-expiratory pressure 15 cm H2O, peak inspiratory pressure 35-40 cm H2O for 30 secs, group RM)
228 rowing against ventilator insufflations when inspiratory pressure is increased during nasal pressure
229 on (higher PaO2/FIO2) rather than lower peak inspiratory pressure or DeltaP, as oxygenation was more
230 cally, we tested the hypothesis that a short inspiratory pressure rise time or a low PaCO2 level prom
232 (n = 145) or NIV delivered via facial mask (inspiratory pressure support level, 5-15 cm H2O; positiv
233 l sleep apnea by delivering servo-controlled inspiratory pressure support on top of expiratory positi
237 etermine whether respiratory mechanics (peak inspiratory pressure, positive end-expiratory pressure,
240 (4-8 ml/kg predicted body weight) and lower inspiratory pressures (plateau pressure < 30 cm H2O) (mo
244 asured based on mean lung density expiratory/inspiratory ratio was greater in patients with severe an
245 asured based on mean lung density expiratory/inspiratory ratio was significantly increased in patient
246 rongly with the mean lung density expiratory/inspiratory ratio, a CT marker of expiratory air trappin
247 ons affected breathing at rest by decreasing inspiratory-related activity, attenuating the hypoxia- a
248 ex assemble excitatory networks that produce inspiratory-related neural rhythms, but the importance o
250 s of their firing frequency and amplitude of inspiratory-related sympathetic activity in rats in norm
252 -175) mL/cm H2O at 60 L/min (p = 0.007), and inspiratory resistance decreased from 9.6 (5.5-13.4) to
254 means of inspiration of patients themselves, inspiratory resistance of DPI is an important factor for
257 of this study was to determine the effect of inspiratory resistance through an impedance threshold de
258 ham, no resistance) versus an ITD (increased inspiratory resistance) in 26 patients with postural tac
260 CS exposed mice showed significant increased inspiratory resistance, functional residual capacity, ri
261 /min, we read off suction pressures and find inspiratory resistances by calculation (=suction pressur
262 c vagal tone is intrinsically linked to post-inspiratory respiratory control using the unanaesthetize
263 (preBotC) as the site for the generation of inspiratory rhythm and (b) the retrotrapezoid nucleus/pa
266 esis that the preBotzinger complex generates inspiratory rhythm and the retrotrapezoid nucleus-parafa
267 zinger complex (preBotC), a critical site of inspiratory rhythm generation, release a gliotransmitter
269 cytes in the pre-Botzinger Complex (preBotC) inspiratory rhythm-generating network acts via P2Y1 rece
273 essure support ventilation is not altered by inspiratory rise times ranging from 0.05 to 0.4 s or by
274 ous plugging, or other airway abnormalities (inspiratory scans) and trapped air (expiratory scans).
276 g while awake) generated loud high frequency inspiratory sounds (HFIS, defined as inspiratory sounds
278 t girl presenting with an encephalomyopathy, inspiratory stridor, ventilator failure, progressive hyp
279 and contractile activity (quantified by the inspiratory thickening fraction) were measured daily by
284 ity, leak volume, inspiratory trigger delay, inspiratory time in excess, and the five main asynchroni
285 Pressure-support ventilation and increased inspiratory time were independently associated with the
288 ilated with high strain rates had much lower inspiratory-to-expiratory time ratios (down to 1:9).
290 ches to setting Vt may include limits on end-inspiratory transpulmonary pressure, lung strain, and dr
291 expiratory lung volumes while decreasing end-inspiratory transpulmonary pressure, suggesting an impro
294 diaphragm electrical activity, leak volume, inspiratory trigger delay, inspiratory time in excess, a
295 inspiration was independently determined by inspiratory valvular-to-annular ratio (P=0.026) and insp
296 1 second (FEV1) and FEV1 as a percentage of inspiratory vital capacity (FEV1%VC) were assessed with
298 presence or absence of posttussive emesis or inspiratory whoop modestly change the likelihood of pert
299 conditions where periods between successive inspiratory XII bursts were highly variable and distribu
300 ted ipsilaterally also to regions containing inspiratory XII premotoneurons and motoneurons, whereas
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