Singh Karamjit, Bhargav Hemant, Srinivasan T M
Division of Yoga and Life Science, Anvesana Research Laboratories, S-VYASA Yoga University, Bengaluru, Karnataka, India.
Int J Yoga. 2016 Jan-Jun;9(1):12-9. doi: 10.4103/0973-6131.171711.
To measure the effect of the right and left nostril yoga breathing on frontal hemodynamic responses in 32 right handed healthy male subjects within the age range of 18-35 years (23.75 ± 4.14 years).
Each subject practiced right nostril yoga breathing (RNYB), left nostril yoga breathing (LNYB) or breath awareness (BA) (as control) for 10 min at the same time of the day for three consecutive days, respectively. The sequence of intervention was assigned randomly. The frontal hemodynamic response in terms of changes in the oxygenated hemoglobin (oxyHb), deoxygenated hemoglobin (deoxyHb), and total hemoglobin (totalHb or blood volume) concentration was tapped for 5 min before (pre) and 10 min during the breathing practices using a 16 channel functional near-infrared system (FNIR100-ACK-W, BIOPAC Systems, Inc., U.S.A.). Average of the eight channels on each side (right and left frontals) was obtained for the two sessions (pre and during). Data was analyzed using SPSS version 10.0 through paired and independent samples t-test.
Within group comparison showed that during RNYB, oxyHb levels increased significantly in the left prefrontal cortex (PFC) as compared to the baseline (P = 0.026). LNYB showed a trend towards significance for reduction in oxyHb in the right hemisphere (P = 0.057). Whereas BA caused significant reduction in deoxyHb (P = 0.023) in the left hemisphere. Between groups comparison revealed that oxyHb and blood volume in the left PFC increased significantly during RNYB as compared to BA (oxyHb: P =0.012; TotalHb: P =0.017) and LNYB (oxyHb: P =0.024; totalHb: P =0.034).
RNYB increased oxygenation and blood volume in the left PFC as compared to BA and LNYB. This supports the relationship between nasal cycle and ultradian rhythm of cerebral dominance and suggests a possible application of uninostril yoga breathing in the management of psychopathological states which show lateralized cerebral dysfunctions.
测量18 - 35岁（23.75 ± 4.14岁）的32名右利手健康男性受试者进行左右鼻孔瑜伽呼吸时对额叶血流动力学反应的影响。
每位受试者分别在一天中的同一时间进行右鼻孔瑜伽呼吸（RNYB）、左鼻孔瑜伽呼吸（LNYB）或呼吸觉知（BA，作为对照），持续10分钟，连续进行三天。干预顺序随机分配。使用16通道功能性近红外系统（FNIR100 - ACK - W，美国BIOPAC Systems公司），在呼吸练习前5分钟（预）和练习期间10分钟，获取额叶血流动力学反应，即氧合血红蛋白（oxyHb）、脱氧血红蛋白（deoxyHb）和总血红蛋白（totalHb或血容量）浓度的变化。对两个阶段（预和期间），分别获取每侧（右额叶和左额叶）八个通道的平均值。使用SPSS 10.0版本通过配对和独立样本t检验对数据进行分析。
组内比较显示，与基线相比，在RNYB期间，左前额叶皮质（PFC）的oxyHb水平显著升高（P = 0.026）。LNYB显示右半球oxyHb有降低的显著趋势（P = 0.057）。而BA导致左半球deoxyHb显著降低（P = 0.023）。组间比较显示，与BA（oxyHb：P = 0.012；TotalHb：P = 0.017）和LNYB（oxyHb：P = 0.024；totalHb：P = 0.034）相比，RNYB期间左PFC的oxyHb和血容量显著增加。
与BA和LNYB相比，RNYB增加了左PFC的氧合和血容量。这支持了鼻周期与大脑优势的超日节律之间的关系，并表明单侧鼻孔瑜伽呼吸在管理表现为大脑功能单侧化障碍的精神病理状态方面可能有应用价值。
