The airflow mechanics in adult nasal airways,whether healthy or abnormal,are extensively studied and investigated,but the flow mechanics in child nasal airways remain underexplored.This study investigates the airflow ...The airflow mechanics in adult nasal airways,whether healthy or abnormal,are extensively studied and investigated,but the flow mechanics in child nasal airways remain underexplored.This study investigates the airflow mechanics in the child’s nasal upper airway with adenoid hypertrophy,with an adenoid nasopharyngeal ratio(AN of 0.9),under cyclic inhalation and exhalation.An inlet respiratory cycle with three different flow rates(3.2 L/min calm breathing,8.6 L/min normal breathing,and 19.3 L/min intensive breathing)was simulated by using the computational fluid dynamics approach.To better capture the interaction between airflow and the flexible airway tissue,fluid-structure interaction analysis was performed at the normal breathing rate.Comparing the airflow dynamics during inhalation and exhalation,the pressure drops,nasal resistance,and wall shear stress show significant differences in the nasopharyngeal region for all different flow rates.This observation suggests that the inertial effect associated with the transient flow is important during exhalation and inhalation.Furthermore,the considerable temporal variation in flow rate distribution across a specific cross-section of the nasal airway highlights the critical role of transient data in virtual surgery planning and data for clinical decisions.展开更多
Research and Results: Schizophrenia begins with nasal obstruction, disrupting supraschalemic nucleus output and lateralized ultradian body rhythms. If one nostril is blocked, vaso-choking occurs in the ipsilateral bra...Research and Results: Schizophrenia begins with nasal obstruction, disrupting supraschalemic nucleus output and lateralized ultradian body rhythms. If one nostril is blocked, vaso-choking occurs in the ipsilateral brain hemisphere cortex, which has vesicles connected to the nose. This disturbs the ultradian balance of the body and brain hemispheres causing abnormal behavior and bizarre thinking. The brain has a bidirectional connection and communication with the body via the nervous system. The Hypothalamic-Pituitary-Adrenal (HPA) axis, Autonomic Nervous System (ANS), and vagus nerve are linked. ANS lateralization can switch from parasympathetic to sympathetic due to vagus nerve changes. Schizophrenia is characterized by Basic Rest Activity Cycle (BRAC) energy balance disruption. Let’s examine how a disruption in the lateralization of the nasal cycle can lead to pathology in the mind. Purpose and Method: A literary search is conducted in comparison with authors’ introspective insights to summarize schizophrenia’s genesis after curing this disease to fill the knowledge gap between a few relevant theories to build a percept of the disease through this (mini) narrative review. Conclusion: Nasal cycle and vagus nerve toning can play roles in mental health.展开更多
基金supported by the National Key Research and Development Program of China(Grant No.2022YFF0707601).
文摘The airflow mechanics in adult nasal airways,whether healthy or abnormal,are extensively studied and investigated,but the flow mechanics in child nasal airways remain underexplored.This study investigates the airflow mechanics in the child’s nasal upper airway with adenoid hypertrophy,with an adenoid nasopharyngeal ratio(AN of 0.9),under cyclic inhalation and exhalation.An inlet respiratory cycle with three different flow rates(3.2 L/min calm breathing,8.6 L/min normal breathing,and 19.3 L/min intensive breathing)was simulated by using the computational fluid dynamics approach.To better capture the interaction between airflow and the flexible airway tissue,fluid-structure interaction analysis was performed at the normal breathing rate.Comparing the airflow dynamics during inhalation and exhalation,the pressure drops,nasal resistance,and wall shear stress show significant differences in the nasopharyngeal region for all different flow rates.This observation suggests that the inertial effect associated with the transient flow is important during exhalation and inhalation.Furthermore,the considerable temporal variation in flow rate distribution across a specific cross-section of the nasal airway highlights the critical role of transient data in virtual surgery planning and data for clinical decisions.
文摘Research and Results: Schizophrenia begins with nasal obstruction, disrupting supraschalemic nucleus output and lateralized ultradian body rhythms. If one nostril is blocked, vaso-choking occurs in the ipsilateral brain hemisphere cortex, which has vesicles connected to the nose. This disturbs the ultradian balance of the body and brain hemispheres causing abnormal behavior and bizarre thinking. The brain has a bidirectional connection and communication with the body via the nervous system. The Hypothalamic-Pituitary-Adrenal (HPA) axis, Autonomic Nervous System (ANS), and vagus nerve are linked. ANS lateralization can switch from parasympathetic to sympathetic due to vagus nerve changes. Schizophrenia is characterized by Basic Rest Activity Cycle (BRAC) energy balance disruption. Let’s examine how a disruption in the lateralization of the nasal cycle can lead to pathology in the mind. Purpose and Method: A literary search is conducted in comparison with authors’ introspective insights to summarize schizophrenia’s genesis after curing this disease to fill the knowledge gap between a few relevant theories to build a percept of the disease through this (mini) narrative review. Conclusion: Nasal cycle and vagus nerve toning can play roles in mental health.
