Brown-Séquard revisited: a lesson from history on the placebo effect of androgen treatment
clinical paper · 2002
LINK
SUMMARY
The canonical modern reassessment of Brown-Séquard's 1889 testicular-extract experiment. Cussons et al reconstructed the dose Brown-Séquard administered to himself (five injections over 18 days, each delivering roughly the extract of one dog testis prepared by aqueous maceration) and estimated the testosterone content of the preparation using modern measurements of testicular testosterone concentration and injection volume. The reconstruction concluded that the testosterone delivered was roughly four orders of magnitude below any therapeutic level. The reported clinical effects were therefore necessarily a placebo response. Standard modern reference for endocrinology and history-of-medicine discussion of the case. The 1894 date in the slug is the original scaffolding placeholder; the source content is the canonical modern disconfirmation.
NOTES
The Cussons et al paper is the appropriate citation for any modern evidence-based discussion of Brown-Séquard’s 1889 experiment. The reconstruction of the dose is the central methodological contribution: the paper translates Brown-Séquard’s qualitative protocol description into a quantitative estimate of biological exposure, and the estimate is sufficiently far below any plausible therapeutic threshold that the placebo-response interpretation becomes forced rather than optional. The 1894 date encoded in the original scaffolding slug refers to the year of Brown-Séquard’s death and the year by which contemporary critical assessment of the protocol had begun; the canonical modern disconfirmation is 2002.