The cyanide gasp and spontaneous deep breaths.
نویسندگان
چکیده
Stimulation of the carotid body chemoreceptors with cyanide in anaesthetized rabbits usually causes a deep breath or gasp, but only if the vagus nerves are intact. This gasp has several similarities with spontaneous deep breaths in eupnoea. In paralysed rabbits, artificially ventilated, chemoreceptor stimulation induces an augmented discharge in the phrenic nerve equivalent to a gasp. In spontaneously breathing rabbits spontaneous deep breaths are more frequent with hypoxia than with normoxia. The results are interpreted in relation to (i) positive feedback from the lungs and (ii) summation of chemoreceptor and tonic vagal drive causing augmented deep breaths.
منابع مشابه
The efficacy of diaphragmatic breathing practice on respiratory function, balance, and quality of life in elderly women
Introduction: Introduction: The respiratory system affects the motor control and stability of the body, especially in the elderly. The present study aimed to determine the effect of diaphragmatic breathing practice on respiratory function, balance, and quality of life in elderly women. Materials and Methods: Forty elderly women with a mean age of 72.40 years participated in this study voluntari...
متن کاملCardiovascular and respiratory changes during slow-wave sleep in rats are associated with electrocorticogram desynchronization.
In awake rats a single recurrent larger tidal volume (deep breaths) occurs at regular intervals, followed by oscillations in arterial pressure and heart rate. In the present study we recorded the changes in blood pressure, heart rate and ventilation during the wakefulness-sleep cycle identified by electrocorticographic records in order to determine whether the deep breaths and cardiovascular os...
متن کاملThe agony of agonal respiration: is the last gasp necessary?
Gasping respiration in the dying patient is the last respiratory pattern prior to terminal apnoea. The duration of the gasping respiration phase varies; it may be as brief as one or two breaths to a prolonged period of gasping lasting minutes or even hours. Gasping respiration is very abnormal, easy to recognise and distinguish from other respiratory patterns and, in the dying patient who has e...
متن کاملComparing the Effect of Two Methods of Distraction on the Pain Intensity Venipuncture in School-age Children: A Randomized Clinical Trial
Background Children undergo painful procedures during care and treatment. This study aimed to determine the effect of distractionon the intensityof pain in children aged 6 to 12 years old. Materials and Methods This clinical trial was conducted on the school-age children, who referred to Imam Hossein Hospital, Iran, Heris city, East Azarbaijan province (Iran) in 2017. In total 48 patients were...
متن کاملInfluence of deep breathing exercise on spontaneous respiratory rate and heart rate variability: a randomised controlled trial in healthy subjects.
Studies show that yogic type of breathing exercises reduces the spontaneous respiratory rate. However, there are no conclusive studies on the effects of breathing exercise on heart rate variability. We investigated the effects of non-yogic breathing exercise on respiratory rate and heart rate variability. Healthy subjects (21-33 years, both genders) were randomized into the intervention group (...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Acta neurobiologiae experimentalis
دوره 33 1 شماره
صفحات -
تاریخ انتشار 1973