Alternating lateralization of plasma catecholamines and nasal patency in humans.
Level 4 - case-series / case-control
Small observational physiological study with repeated measures across time
PubMed 3959751 · doi:10.1016/0024-3205(86)90175-x
What was done
Researchers measured plasma catecholamines (norepinephrine, epinephrine, and dopamine) via radioenzymatic assay in blood sampled simultaneously from both antecubital veins every 7.5 minutes over periods of 3 to 6 hours. Assessments were conducted in resting human male subjects across 7 experiments to examine whether lateral differences in circulating catecholamines correlated with airflow patterns of the nasal cycle.
What was found
In 7 out of 7 experiments in resting males, catecholamine levels demonstrated alternating high levels between the two arms. The ratio of norepinephrine between the two arms paralleled the pattern of airflow in the nasal cycle. The abstract provides no exact catecholamine concentrations, numerical ratios, cycle durations, or statistical significance values.
Why it matters
This study suggests that autonomic nervous system activity and peripheral catecholamine output may alternate rhythmically across paired bilateral structures in humans.
Limits
The total number of unique subjects is not stated (reported only as 7 experiments), and the sample was restricted entirely to resting men. No numerical data, confidence intervals, or formal statistical hypothesis tests are reported in the abstract.