Hiraba Hisao, Sato Takako, Saito Kimiko, Iwakami Tomoyo, Mizoguchi Naoko, Fukano Mika, Ueda Koichiro
Department of Dysphasia Rehabilitation, Nihon University school of Dentistry, Tokyo, Japan.
Somatosens Mot Res. 2007 Sep;24(3):115-26. doi: 10.1080/08990220701507401.
We proposed that cortical organization for the execution of adequate licking in cats was processed under the control of two kinds of affiliated groups for face and jaw & tongue movements (Hiraba H, Sato T. 2005A. Cerebral control of face, jaw, and tongue movements in awake cats: Changes in regional cerebral blood flow during lateral feeding Somatosens Mot Res 22:307-317). We assumed the cortical organization for face movements from changes in MRN (mastication-related neuron) activities recorded at area M (motor cortex) and orofacial behaviors after the lesion in the facial SI (facial region in the primary somatosensory cortex). Although we showed the relationship between facial SI (area 3b) and area M (area 4delta), the property of area C (area 3a) was not fully described. The aim of this present study is to investigate the functional role of area C (the anterior part of the coronal sulcus) that transfers somatosensory information in facial SI to area M, as shown in a previous paper (Hiraba H. 2004. The function of sensory information from the first somatosensory cortex for facial movements during ingestion in cats Somatosens Mot Res 21:87-97). We examined the properties of MRNs in area C and changes in orofacial behaviors after the area C or area M lesion. MRNs in area C had in common RFs in the lingual, perioral, and mandibular parts, and activity patterns of MRNs showed both post- and pre-movement types. Furthermore, cats with the area C lesion showed similar disorders to cats with the area M lesion, such as the dropping of food from the contralateral mouth, prolongation of the period of ingestion and mastication, and so on. From these results, we believe firmly the organization of unilateral cortical processing in facial SI, area C, and area M for face movements during licking.
我们提出，猫进行适当舔舐动作的皮质组织是在两种分别控制面部、颌部和舌头运动的关联群组的控制下进行处理的（平场博、佐藤哲。2005A。清醒猫面部、颌部和舌头运动的大脑控制：侧向进食时局部脑血流的变化。躯体感觉与运动研究22:307 - 317）。我们根据在M区（运动皮层）记录到的MRN（咀嚼相关神经元）活动变化以及初级躯体感觉皮层面部区域（面部SI）损伤后的口面部行为，推测了面部运动的皮质组织。尽管我们展示了面部SI（3b区）和M区（4δ区）之间的关系，但C区（3a区）的特性尚未得到充分描述。本研究的目的是调查C区（冠状沟前部）的功能作用，该区域如前文所述（平场博。2004。猫摄食过程中来自第一躯体感觉皮层的感觉信息对面部运动的作用。躯体感觉与运动研究21:87 - 97），将面部SI中的躯体感觉信息传递至M区。我们检查了C区MRN的特性以及C区或M区损伤后的口面部行为变化。C区的MRN在舌部、口周和下颌部分具有共同的感受野，并且MRN的活动模式显示出运动后和运动前两种类型。此外，C区损伤的猫表现出与M区损伤的猫类似的障碍，如对侧口角食物掉落、摄食和咀嚼时间延长等。基于这些结果，我们坚信在舔舐过程中，面部SI、C区和M区对面部运动的单侧皮质处理组织。
