CAT TRICEPS SURAE MOTOR NUCLEI ARE ORGANIZED TOPOLOGICALLY
CAT TRICEPS SURAE MOTOR NUCLEI ARE ORGANIZED TOPOLOGICALLY
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DOI：
10.1016/0014-4886(87)90178-6
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发表时间：
1987-04-01
影响因子：
5.3
通讯作者：
ENGLISH, AW
中科院分区：
文献类型：
--
作者：
WEEKS, OI;ENGLISH, AW
“室核”由一组脊髓运动神经元组成，为肌肉神经的各个初级分支提供能量。每个初级肌肉神经分支支配肌肉的特定子体积或隔室。检查为猫内侧腓肠肌提供初级神经分支的运动神经元的空间和大小分布，以：（i）确定是否有内侧腓肠肌； (ii) 确定共同控制小腿三头肌（腓肠肌外侧和内侧、比目鱼肌）运动核的组织类型。将腓肠肌内侧神经的各个初级分支暴露于辣根过氧化物酶溶液中，以逆行地标记其来源细胞。将每个室核与整个腓肠肌内侧运动核的分布进行比较。这些数据还与腓肠肌外侧运动核中运动神经元的空间和大小分布的数据进行了比较。结果表明每个区室核中运动神经元的分布在头尾部重叠。然而，近端到远端的肌肉室存在从头到尾的地形排列和每个室核的优先尺寸分布。这些和其他结果表明，整个小腿三头肌群的运动核是按拓扑类型图组织的。
A "compartment nucleus" consists of a group of spinal motoneurons that supply the individual primary branches of a muscle nerve. Each primary muscle nerve branch innervates a specific subvolume or compartment of a muscle. The spatial and size distributions of motoneurons supplying primary nerve branches of the cat medial gastrocnemius muscle were examined to: (i) determine whether or not the medial gastrocnemius; (ii) determine the type of organization which collectively governs the triceps surae (lateral and medial gastrocnemius, soleus) motor nuclei. Individual primary branches of the medial gastrocnemius nerve were exposed to a horseradish peroxidase solution to the retrogradely label their cells of origin. Each compartment nucleus was compared with the distribution of the entire medial gastrocnemius motor nucleus. These data were also compared with the data on the spatial and size distribution of motoneurons in the lateral gastrocnemius motor nucleus. Results indicated rostracaudal overlap in the distribution of motoneurons in each compartment nucleus. However, a rostral to caudal topographic arrangement and preferential size distribution for each compartment nucleus exist for proximal to distal muscle compartments. These and other results indicate that the motor nuclei of the entire triceps surae muscle groups are organized by a topologic type map.