尽管临床上检查掌颏反射已成为一种常规,但其在诊断上的意义尚不十分明确。 1920年Marinesco和Radovici认为这一反射弧经过正中神经、尺神经、脊髓侧柱、第6～8颈神经根、面神经核、面神经。掌颏反射机制尚不清楚。正常人也有这一反射,有的认为只占7％,有的则认为占50％。然而,人们将很明显的掌颏反射看成是口自动症反射的一种。当大脑皮质和皮质下结构的相互联系有障碍时才出现。在此,一些作者认为本反射见于锥体系统损害,而另一些作者认为其产生与抑制和调节脑干内一 Although clinical examination of the chin reflex has become a routine, but its significance in the diagnosis is not yet clear. In 1920, Marinesco and Radovici believed that this reflex arc passes through the median nerve, ulnar nerve, spinal column, 6 ~ 8 cervical nerve root, facial nerve nucleus, facial nerve. Palm chin reflex mechanism is not clear. Normal people also have this reflection, some think only 7%, while others think that 50%. However, it is obvious that the human chin reflex is a type of auto-reflex. Occurs when the interconnected cortical and subcortical structures have barriers. Here, some authors consider this reflex seen as damage to the pyramidal system, while others believe that its production is associated with inhibition and regulation of the brainstem within one