The article in question says something about this matter:PadmaVonSamba wrote: ↑Wed Mar 29, 2023 7:37 pmthat may very well be the case. In general, doing things which give one a sense of positivity increases the release of chemicals into the blood which improves overall health and boosts the immune system.
Whether the results shown are because the mantras and dharanis were mantras and dharanis and not some other spoken words would still need to be established. To validate this theory, that the dharani or mantra itself has healing power, one would need to give half the test subjects genuine mantras and give the other half “placebo mantras” strings of Sanskrit nonsense words, while being told their mantras had power, and then compare the results of the two subject groups. This report doesn’t specify what type of testing was done.
"In this section, four Mantra-Meditation studies using mantras
including “Om” and “TM” are examined to explore the psychological
and physiological evidence on the mental and physical changes that
benefit from practicing mantra meditation. The review presented
is not meant to be a comprehensive one but rather a brief exposure
of several typical medical studies to illustrate the health benefits
from both silent and loud mantra-meditations.
Salivary immunoglobulin A (s-IgA) Changes by loud
mantra chanting
Salivary immunoglobulin A (s-IgA) is an antibody found in body
fluids that prevent microorganisms’ adhesion to the epithelial cells
in gastrointestinal and respiratory tracts, thus helping the body to
counteract the pathogens ingested, inhaled, or adhered to the body
surface.
A ten-month study with 30 healthy Iranian women (mean
age of 44+ 3 years) recruited from yoga clubs in Shiraz, Iran, was
conducted in 2016 to evaluate the effect of loud mantra chanting
on the change of s-IgA . Fifteen participants were randomly
assigned to the experimental (test) group while the rest fifteen
were the control group. The experimental-group participants did
group mantra-meditation by repeating the mantra with a loud
voice for about 20 min, while the control group participants were
left passive in sitting on their chairs at rest condition in a different
room. During 20-min loud reciting, the participants were sitting
cross-legged on the ground and the mantra chanted was “Hoo,”
which is one of God’s names in Iranian theosophy. Saliva samples
were collected from both groups at four interventions, i.e., at pre-
test (8:30 am), after the tutorial session (9:20 am), after 20-min
chanting meditation (9:50 am), and one-hour later time (10:50
am) . The s-IgA level was evaluated using an enzyme-linked
immunosorbent-assay test and the salivary kits were used with the
normal range between 40 and 170 μg/ml.
The mean s-IgA concentrations of the samples taken after the
meditation one-hour later from the experimental group were found
to be statistically different from those of the control group. The
change of the s-IgA level of the control group is from 53.5 μg/ml
at pretest time to 66.2 μg/ml at one hour later time after the 20-
min resting, a 23.7% increase, while the corresponding change of
the experimental group is from 54.3 μg/ml to 96.3 μg/m, a 77.3%,
which is 3.26 times higher than that of the control group. This
difference is statistically significant. Since the s-IgA level is a type
of antibody found in body fluids, normally, the higher the antibody
level, the better the body’s immune system. This study indicates
that continuously reciting a mantra even for a single-20 min session
can have a positive influence on immunological components and
improve the immune states of the chanters.
EEG brain-spectra influenced by loud chanting of Om
mantra
The Electroencephalogram (EEG) is a method to measures
voltage fluctuations (brain waves) resulting from ionic current
within the neurons of the surface layer of the brain. Through
small metal electrodes attached to the brain scalp, brain cells can
communicate via electrical impulses all the time, even when the
tester is asleep.
By using EEG, Harne & Hiwale studied the brain dynamics
of oscillatory (brain waves) changes as a result of Loud Om Mantra
meditation. Twenty-three Indian college students without any
mantra meditation experience were recruited for the loud Om
meditation study. All participants were right-handed and healthy
(nonsmokers, medication-free and none-habitual drinker). EEG
spectra were recorded before and after 30-min loud Om chanting.
The recorded EEG signals were then analyzed using spectral-
domain analysis.
During meditation, first, the participants have to inhale
smoothly; soon they have to release the air (exhale) by chanting
Om. The surrounding was made silent, and no light was in the room
during the 30-min loud chanting. The participants were then asked
to relax by laying down and eyes closed, and EEG was recorded for
more than 2 min in the electrical shield room of the Bilala hospital
in Shegaon, India under the guidance of a medical doctor. Sixteen
electrodes were used to provide 16-channel data for analysis. The
IBM SPSS, version 22 was used for statistical analysis. A significant
increase in theta power was found after chanting when averaged
across all brain regions .
The results show that a loud 30-min Om meditation alters theta
EEG patterns (frequency from 4 to 7 Hz) significantly (increase)
higher than the baseline EEG brain-wave patterns, which is similar
to other studies documenting a reduction in cortical arousal during
a state of relaxation. The present finding implies that the loud ‘Om’
chanting should have the potential for offering stress relaxation
for the practitioner. The loud Om chanting can also serve as an
introduction to mantra meditation that provides naive meditators
with the opportunity to experience of chanting meditation to
state of relaxation.
Hemodynamic imaging affected by silent Om chanting
Deepeshwar et al. employed functional Near-Infrared
Spectroscopy (fNIRS) to study the relative hemodynamic changes
in the prefrontal cortex (PFC) during 20-min Silent Om Chanting.
The PFC is a part of the brain located at the front of the frontal lobe,
Hemodynamics is to study the relationship between the circulatory
changes of blood flow and cardiovascular functions, while the
fNIRS is adopted for measuring the circulatory changes of blood
flow. The fNIRS uses near-infrared (NIR) light for measuring the
concentration of the hemoglobin to estimate cortical hemodynamic
activity which occurs in response to neural activity. The technique
takes the advantage of the optical window in which skin, tissue, and
bone are mostly transparent to NIR light (700–900 nm wavelength)
and, on the other hand, hemoglobin and deoxygenated hemoglobin
are strong absorbers of NIR light. Thus, NIR light can penetrate the
‘transparent’ surface layer of the scalp and detect the underneath
regions near the cortical surface as the NIR detector moves or
propagates through the head. "
And so on...
Several studies are referred to in this article, you just have to read it.