Biomaterial Database

Changes in human nasal resistance associated with exercise, hyperventilation and rebreathing. 1977

N S Dallimore, and R Eccles

The nasal resistance to airflow determined in four subjects for periods of up to 7 hr. Cyclic changes in the resistance of each nasal passage were demonstrated in 13 or 24 experiments. After exercise on the cycle ergometer the total nasal resistance decreased and this change in nasal resistance was found to be directly related to the work rate. After oral rebreathing, the total nasal resistance decreased, and after hyperventilation the total nasal resistance increased. These changes in resistance are believed to be caused by changes in arterial pCO2 and mediated by the autonomic innervation of the nasal vasculature.

UI	MeSH Term	Description	Entries
D006985	Hyperventilation	A pulmonary ventilation rate faster than is metabolically necessary for the exchange of gases. It is the result of an increased frequency of breathing, an increased tidal volume, or a combination of both. It causes an excess intake of oxygen and the blowing off of carbon dioxide.	Hyperventilations
D008297	Male		Males
D009666	Nose	A part of the upper respiratory tract. It contains the organ of SMELL. The term includes the external nose, the nasal cavity, and the PARANASAL SINUSES.	External Nose,External Noses,Nose, External,Noses,Noses, External
D001945	Breathing Exercises	Therapeutic exercises aimed to deepen inspiration or expiration or even to alter the rate and rhythm of respiration.	Respiratory Muscle Training,Exercise, Breathing,Muscle Training, Respiratory,Training, Respiratory Muscle
D002245	Carbon Dioxide	A colorless, odorless gas that can be formed by the body and is necessary for the respiration cycle of plants and animals.	Carbonic Anhydride,Anhydride, Carbonic,Dioxide, Carbon
D005082	Physical Exertion	Expenditure of energy during PHYSICAL ACTIVITY. Intensity of exertion may be measured by rate of OXYGEN CONSUMPTION; HEAT produced, or HEART RATE. Perceived exertion, a psychological measure of exertion, is included.	Physical Effort,Effort, Physical,Efforts, Physical,Exertion, Physical,Exertions, Physical,Physical Efforts,Physical Exertions
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328	Adult	A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available.	Adults
D000403	Airway Resistance	Physiologically, the opposition to flow of air caused by the forces of friction. As a part of pulmonary function testing, it is the ratio of driving pressure to the rate of air flow.	Airway Resistances,Resistance, Airway,Resistances, Airway
D014666	Vasomotor System	The neural systems which act on VASCULAR SMOOTH MUSCLE to control blood vessel diameter. The major neural control is through the sympathetic nervous system.	System, Vasomotor,Systems, Vasomotor,Vasomotor Systems