标题：Motor unit involvement and activities in respiratory muscles during spirometric measurements of obstructive and restrictive lung diseases in 14-20 years male.
摘要：Introduction: Breathing involves respiratorymuscle activities by recruiting motor units. Theobstructive and restrictive lung diseases werecategorized based on spirometric measurement.Measurement of respiratory muscle function isimportant in the diagnosis of respiratory disease ordysfunction.Purpose: This study focuses on the involvement ofmotor units in diaphragm, external intercostals andlatissimus dorsi muscles during voluntarycontractions in young boys having obstructive andrestrictive lung diseases.Materials and methods: Fifty eight young male(14-20 years) were participated and they weregrouped into three (normal, restrictive andobstructive) according to their lung conditionmeasured by Spirometry. One way ANOVA wasdone to understand the significant differencesbetween the muscles of three groups. Involvementof motor unit was shown by plotting the Linediagrams. Mean and standard deviation along withone way ANOVA were calculated in case of threerespiratory muscles (External intercostals,Diaphragm, and latissimus dorsi) for three groups.Results: No significant differences were foundamong three groups during performing Forced vitalcapacity (FVC), Slow vital capacity (SVC),Maximum voluntary ventilation (MVV), andMinute ventilation (MV). Line diagram shows thatduring FVC, SVC, and MVV responses of differentmuscles are higher in three different groups exceptduring MV.Conclusion: This study states that motor unitinvolvement is different in the case of threedifferent conditions. It can be concluded thatrestrictive and obstructive diseases might not beinterpreted on the basis of only spirometricmeasurements in static and dynamic lungconditions. Motor unit activation and responses ofmajor respiratory muscles were importantdeterminants during spirometric measurements.
