Department of Internal Medicine, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.
Graduated from Faculty of Veterinary Medicine, Islamic Azad University of Garmsar, Garmsar, Iran.
Vet Med Sci. 2025 Jan;11(1):e70131. doi: 10.1002/vms3.70131.
Pupillary light reflex (PLR) and menace response are among the tests used in neurological and ophthalmic examinations in animals.
The intent of this study was to investigate the development of the PLR and menace response in neonatal camel calves.
Thirty healthy camel calves were studied after birth until the menace response and PLR were well established. The menace response was assessed by applying a non-tactile visual threat to each eye. The direct PLR was tested by shining a bright light into each eye and observing constriction of the pupil in the ipsilateral eye.
PLR was positive in all camel calves in the first test performed after birth. The first menace response developed at the age of 14 days, with 4 camel calves developing a menace response last, at 18 days of age. The menace response developed in most camel calves at 16 days old. The time to develop the menace response was not statistically different between the two sexes.
The PLR is present in camel calves immediately after birth. Menace response in camel calves develops within 18 days after birth.
瞳孔对光反射（PLR）和惊吓反应是动物神经学和眼科检查中常用的测试方法之一。
本研究旨在探讨新生骆驼幼驹 PLR 和惊吓反应的发育情况。
在威胁反应和 PLR 发育良好之前，对 30 头健康的骆驼幼驹进行了研究。通过对每只眼睛施加非触觉视觉威胁来评估威胁反应。通过向每只眼睛照射强光并观察同侧瞳孔收缩来测试直接 PLR。
出生后第一次测试时，所有骆驼幼驹的 PLR 均为阳性。首次惊吓反应在 14 日龄时出现，最后 4 只骆驼幼驹在 18 日龄时出现惊吓反应。大多数骆驼幼驹在 16 日龄时出现惊吓反应。两种性别之间出现惊吓反应的时间没有统计学差异。
PLR 在骆驼幼驹出生后立即存在。骆驼幼驹的惊吓反应在出生后 18 天内发展。
