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The Effects Of Posture On Quantitative Eeg And End Tidal Co2 Duringstandardised Optimal Hyperventiation In Healthy Adults And In Patients With Childhood Absence Epilepsy And Attack Disorders, Ann Coughlan

Doctoral

Hyperventilation is used as an activation procedure during EEG. It induces hypocapnia, which elicits changes in brain wave activity that may be diagnostically useful. The mechanism of action by which Hyperventilation (HV) produces slow theta/delta waves on EEG remains conjectural. Four criteria determine the magnitude of HV response: vigorous exchange of air, blood glucose levels, age of subject, and posture. Effects of posture are poor studied quantitatively. Objective: A Standardised Optimal Hyperventilation Protocol (SOHVP), which elicited Hyperventilation Induced High Amplitude Rhythmic Slow activity (HIHARS) during EEG controlling for posture seated (stOHV) and supine (spOHV) is presented and validated. Method: Respiratory …