Fig. 3From: Age and cognitive status dependent differences in blood steroid and thyroid hormone concentrations in intact male ratsPlasma concentrations of thyroid hormones of aged good and poor learners and young rats (n = 10, each). T3, triiodothyronine; T4, thyroxine; TSH, thyroid-stimulating-hormone. Horizontal and vertical bars indicate statistically significant differences between groups. Given are the means with standard deviationBack to article page