Spector A C, Redman R, Garcea M
Department of Psychology, University of Florida, Gainesville 32611-2250, USA.
Behav Neurosci. 1996 Oct;110(5):1096-109.
Lick responses to sucrose and maltose (0.01-1.0 M) were measured in nondeprived rats during brief-access taste trials before and after histologically confirmed gustatory neurotomy. Pronounced decreases in sugar responsiveness occurred after combined section of the chorda tympani (CT) and greater superficial petrosal nerves. The additional section of the glossopharyngeal nerve (GL) flattened the sucrose concentration-response function. Extirpation of the sublingual and submaxillary salivary glands also attenuated sugar responsiveness. Section of the CT or GL alone or in combination caused less severe or no decreases in sugar licking. There were signs of licking impairments after some of these neurotomies, but the data suggest that changes in sugar responsiveness were not solely motor in origin. Thus the 7th nerve is necessary and most likely sufficient for the maintenance of normal unconditioned appetitive responsiveness to sucrose and maltose.
在组织学确诊的味觉神经切断术前和术后的短暂接触味觉试验中，测量了未剥夺食物的大鼠对蔗糖和麦芽糖（0.01 - 1.0 M）的舔舐反应。在鼓索神经（CT）和岩大浅神经联合切断后，糖反应性明显降低。舌咽神经（GL）的额外切断使蔗糖浓度 - 反应函数变平。舌下腺和颌下腺的切除也减弱了糖反应性。单独切断CT或GL或二者联合切断，导致糖舔舐反应的降低不那么严重或没有降低。在其中一些神经切断术后有舔舐障碍的迹象，但数据表明糖反应性的变化并非完全源于运动方面。因此，第七神经对于维持对蔗糖和麦芽糖的正常非条件性食欲反应是必要的，而且很可能是足够的。
