Adams R, Mayhew I G
Equine Vet J. 1984 Jul;16(4):306-12. doi: 10.1111/j.2042-3306.1984.tb01933.x.
Behaviour and response to neurological testing of apparently healthy newborn foals differed significantly from the adult in several ways. Foals responded to external stimulation with exaggerated movements although they tended to sink into a relaxed state when restrained. They had a more angular head position and assumed a base wide stance. The menace reflex developed during the first two weeks post partum. In general, the foals' gait was choppy or dysmetric. In lateral recumbency the foals had increased extensor tone, hyperreflexive tendon reflexes, crossed extensor reflexes as well as recumbent extensor thrust reflexes in all four limbs.
明显健康的新生马驹在行为和神经学测试反应方面与成年马在几个方面存在显著差异。马驹对外界刺激的反应是动作夸张，不过在被约束时往往会陷入放松状态。它们的头部位置更有棱角，站立时呈宽基姿势。出生后两周内会出现威胁反射。一般来说，马驹的步态不平稳或步幅不均。侧卧时，马驹四肢的伸肌紧张度增加、腱反射亢进、有交叉伸肌反射以及卧位伸肌推进反射。
