| Physiology of Meditation Techniques |
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Results
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Two factor ANOVA and Tukey test
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The peak amplitudes of the Na and the Nb waves recorded during RNB were significantly higher over the right hemi- sphere than those of the corresponding waves collected dur- ing the BAW session and during the preceding and following periods of RNB. Na wave peak amplitudes recorded on the right side for RNB sessions were significantly different from BAW sessions [F=4.47 (Factor A=RNB vs. BAW), since F (2,78)=3.09, at p=0.05, hence p<0.05]. The multiple comparison Tukey test for the highest significant difference showed that the Na wave peak amplitude on the right side was significantly greater during RNB compared to the values during BAW (q=3.04, as q (2,78) at p=0.05 is equal to 2.82, hence p<0.05).
The Nb wave peak amplitude recorded on the right side for the RNB session was significantly different from the BAW session [F=3.15 (Factor A=RNB vs. BAW), as F (2,78)=3.11 at p=0.05, hence p<0.05]. The multiple comparison Tukey test for the highest significant difference showed that the Nb wave peak amplitude on the right side was significantly greater dur- ing RNB compared to the values during BAW, q=3.45, as q
(2,78) at p=0.025 is equal to 3.25, hence p<0.025. Similarly, the Nb wave peak amplitude on the right side was significant- ly greater during RNB compared to the preceding value, q=3.23, as q (2,78) at p=0.05 is equal to 2.82, hence p<0.05. There were no significant differences between base- line values for RNB and BAW sessions.
The Tukey test did not show any significant differences between the Na and Nb waves recorded on the left side during the two sessions. Also, waves V and Pa were not significantly different on either side. Figure 1 shows recordings of MLAEPs pre-, during and post-RNB session, recorded on the left (C3-A1) and right side (C4-A2) for all subjects, with each tracing representing the averaged MLAEP from a single subject. Similarly, Figure 2 shows the recordings made pre-, during and post-BAW session on left and right sides. The group average values of peak amplitudes and latencies of the MLAEPs for RNB and BAW sessions are given in Tables 1 and 2 respectively. |
Fig. 1 Recordings of MLAEPs pre-, during and post- RNB recorded on the left (C3-A1) and right (C4-A2)
side for all subjects, with each tracing representing
the averaged MLAEP from a single subject |
Fig. 2 Recordings of MLAEPs pre-, during and post-
BAW recorded on the left (C3-A1) and right (C4-A2)
side for all subjects, with each tracing representing the
averaged MLAEP from a single subject |
Table 1 Peak amplitudes of MLAEPs in RNB and BAW sessions
L, left side; R, right side. Values are group mean±SDs
*p<0.05, **p<0.025, multiple comparison Tukey test, during RNB vs. BAW; †p<0.05, multiple comparison Tukey test, ‘during’ vs. ‘pre’, RNB |
Table 2 Peak latencies of MLAEPs in RNB and BAW sessions
L, left side; R, right side. Values are group means±SDs
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