A Lower THC Condition Had Worse Pegboard Scores in One Clinical Comparison
A clinical cannabis trial summarized in the review did not show a simple higher-dose-is-worse pattern for every motor comparison. At selected times, the lower-THC condition had worse dominant-hand pegboard performance.
The motor result differed from a general dose trend
The review describes poorer dominant-hand Grooved Pegboard scores for the 1.29% THC condition than for both the 3.53% condition and placebo at selected assessments. Other tasks in the evidence base showed more conventional dose-related cognitive effects. One pattern cannot be substituted for the other.
The finding did not establish that more THC improved coordination
A pairwise difference does not by itself identify a beneficial mechanism for the higher condition. Timing, task variability, patient characteristics and the repeated-dosing protocol remain relevant. The review reports the observations without establishing why that particular ordering occurred.
Preserve exceptions without universalizing them
The result cautions against summarizing every endpoint as monotonically dose-dependent. It does not support increasing a patient’s dose to improve performance or treating the lower condition as intrinsically more dangerous. A scientific account names the hand, task and assessment times, alongside the wider set of findings. This was a selected neuropathic-pain population under laboratory conditions, not an experiment establishing a general dose ranking for real-world driving or manual safety.
Related analysis: the review’s broader findings and limitations.
Research cited
This analysis draws on the supplied review: Eadie and colleagues (2021). Duration of Neurocognitive Impairment With Medical Cannabis Use: A Scoping Review. Frontiers in Psychiatry.
Study discussed in that review: DOI 10.1016/j.jpain.2012.10.009.
