Johanson I B
Dev Psychobiol. 1980 May;13(3):343-41. doi: 10.1002/dev.420130309.
Hypo- and hyperthyroid rat pups were tested for their responsiveness on an olfactory and a thermal gradient in an attempt to evaluate the effects of perinatal thyroid manipulation on the ability of the pups to use these cues in orientation. Hypothyroid pups showed a delay and hyperthyroid pups an acceleration in the development of orientation along the olfactory gradient, relative to controls. None of the pups was able to utilize a thermal gradient in directed orientation but pups moved less at the warm end of the gradient than at the cool end. This differential responsiveness was strongest in the hypothyroid pups, suggesting that these pups could utilize thermal cues in an orthokinetic orientation.
对甲状腺功能减退和甲状腺功能亢进的幼鼠进行了嗅觉和热梯度反应测试，以评估围产期甲状腺操作对幼鼠利用这些线索进行定向能力的影响。相对于对照组，甲状腺功能减退的幼鼠在沿嗅觉梯度定向发育方面出现延迟，而甲状腺功能亢进的幼鼠则出现加速。没有一只幼鼠能够在定向运动中利用热梯度，但幼鼠在梯度的温暖端比在凉爽端移动得少。这种差异反应在甲状腺功能减退的幼鼠中最为明显，表明这些幼鼠可以在正动力学定向中利用热线索。
