http://members.westnet.com.au/pkolb/buteyko.htm
Breathing has become a very interesting topic for me as of late, and here's some studies with the important parts for readers in a hurry underneath the links. These studies suggest that breathing habits (hyperventilation) effecting a reduction in our CO2 levels have important roles in asthma attacks and seizure triggers.
CO2 and Acute Asthma
http://www.ncbi.nlm.nih.gov/pubmed/20685222
... Similarly, hypocapnia and associated hyperpnia are linked to bronchoconstriction, symptom exacerbation, and lower quality of life in patients with asthma. Raising CO2 levels by means of therapeutic capnometry has proven beneficial effects in both disorders, and the reversing of hyperventilation has emerged as a potent mediator for reductions in panic symptom severity and treatment success.
http://www.ncbi.nlm.nih.gov/pubmed/20170334
Acute asthmatic attack is an important emergency medical condition. The author hereby reports a case in the emergency department of an acute exacerbation of asthma, complicated by hyperventilation. In this case, the patient had underlying needle phobia, which suddenly occurred during the salbutamol injection. Nevertheless, both physical and psychological approaches led to the successful control of the condition. This report addresses a situation, which, although rare, should not be overlooked.
http://www.ncbi.nlm.nih.gov/pubmed/11083886
...We have consistently argued that mild asthma is an important underlying aetiological factor in patients with severe symptomatic hyperventilation. While hyperventilation has been demonstrated in acute asthma, there have been few studies in mild chronic asthma, and mechanisms are uncertain...
http://www.ncbi.nlm.nih.gov/pubmed/18517073
...CONCLUSION: Differences in perceived asthma triggers are substantially associated with hyperventilation symptoms, and patients with more frequent psychological triggers also tend to report that they experience more hyperventilation symptoms during their asthma symptom episodes
http://www.ncbi.nlm.nih.gov/pubmed/18347909
BACKGROUND: Hyperventilation symptoms are among the sensations asthma patients tend to report during exacerbations of their disease. However, little is known about their importance for the patients' perceived well-being... CONCLUSION: It is possible that hypocapnia creates symptoms that asthma patients cannot control by using their antiasthmatic medication, thus compromising their perceived control over the management of their asthma, and consequently their perceived health. Behavioral interventions should address the problem of hyperventilation in asthma.
http://www.ncbi.nlm.nih.gov/pubmed/3151279
Ambulant, transcutaneous PCO2 monitoring has been used to show that hyperventilation precedes exacerbation of asthma in a patient. Brief treatment was shown to give him greater control of his breathing and enable him to avoid attacks of asthma.
http://www.ncbi.nlm.nih.gov/pubmed/6151437
Ventilation (liters of air per minute) increases during an acute attack of asthma. Hypocapnia is the rule, although eucapnia may occur. This suggests both that respiratory center output is increased and that acidemia is not the major stimulus to augmented respiration...
Overbreathing and Irregular breathing triggering seizures
http://www.ncbi.nlm.nih.gov/pubmed/8617175
In 67% of subjects, absence seizures were reliably provoked by hypocapnia.
http://www.ncbi.nlm.nih.gov/pubmed/20562456
The findings confirm that hyperventilation is efficient to activate epileptic seizures in epileptic patients
http://www.ncbi.nlm.nih.gov/pubmed/20378290
Results: Totally 37 children met the 1989 ILAE criteria of CAE. The onset age of absence seizures ranged from 3 to 11years. All patients had frequent absence seizures (5-60 times per day). Two patients (5.4%) had generalized tonic-clonic seizures. Hyperventilation induced absences in all patients...
http://www.ncbi.nlm.nih.gov/pubmed/20079001
The manifestations of MA included an impairment of consciousness of variable intensity, rhythmic myoclonic jerks with evident tonic contraction mainly involving the upper extremities, a deviation of head and body to one side or asymmetrical jerks observed in some cases, a duration ranging from 2 to 30 s, an abrupt onset and termination, a high frequency of attacks, at least several times to over 30 times per day, and easily provoked by hyperventilation...
http://www.ncbi.nlm.nih.gov/pubmed/19666886
The descriptive symptoms of attacks by witnesses were head shaking or turning repeatedly instead of absences. The seizures were induced by hyperventilation in all 3 cases...
http://www.ncbi.nlm.nih.gov/pubmed/19151614
Hyperventilation (HV) is most effective in activation of generalized absence seizures during routine EEG studies...
http://www.ncbi.nlm.nih.gov/pubmed/18772703
The moderate hyperventilation group showed a significant increase in EEG seizure duration in the first treatment compared with the normal ventilation group (P < 0.05)...
http://www.ncbi.nlm.nih.gov/pubmed/11442159
The most frequent NES clinical features were tonic-clonic mimicking movements and fear/ anxiety/ hyperventilation...
http://www.ncbi.nlm.nih.gov/pubmed/11393330
Typical absences are easily precipitated by hyperventilation in about 90% of untreated patients...
http://www.ncbi.nlm.nih.gov/pubmed/10771260
... Hyperventilation (HPV) represents a well established EEG activation procedure aimed at enhancing epileptiform discharges...
http://www.ncbi.nlm.nih.gov/pubmed/8420691
On the contrary, hyperventilation induced a marked activation of the epileptic focus.
http://www.ncbi.nlm.nih.gov/pubmed/6422704
Hypocapnia induced by hyperventilation to an alveolar CO2-concentration of 2% (2 kPa) resulted in a highly significant increase in seizure duration compared to a normal CO2 of 5%, when the alveolar O2-concentration was constant at 92%. Oxygen ventilation to an alveolar O2-concentration of 92% gave no significant increase in seizure duration compared to 15%, obtained by ventilation with air, when the CO2-concentration was kept constant at 5%. Seizure duration seems to augment progressively with decreasing alveolar CO2-concentration.
http://www.ncbi.nlm.nih.gov/pubmed/6804881
In the light of these results the authors conclude that moderate exercise inhibits rather seizure activity in EEG contrary to hyperventilation which increases these changes.