A STUDY ON THE LOCALIZATION OF THE STERNOCLEIDOMASTOID AND TRAPEZIUS MOTO-NEURONS IN THE RAT BY MEANS OF THE HRP METHOD
A STUDY ON THE LOCALIZATION OF THE STERNOCLEIDOMASTOID AND TRAPEZIUS MOTO-NEURONS IN THE RAT BY MEANS OF THE HRP METHOD
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DOI：
10.1002/ar.1092020412
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发表时间：
1982-01-01
影响因子：
--
通讯作者：
SAKAI, A
中科院分区：
文献类型：
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作者：
KITAMURA, S;SAKAI, A
大鼠胸锁乳突肌和斜方肌受脊副神经（SAN）和颈脊神经（CSN）支配，由胸锁乳突肌、锁乳突肌、锁斜方肌、肩方肌和斜方肌5块较小的肌肉组成。利用辣根过氧化物酶逆行轴突运输技术（HRP法）结合切割SAN，研究了供应这些小肌肉的运动神经元的细胞体位置及其轴突的外周路线。胸锁乳突肌和斜方肌运动神经元在颈脊髓同侧前角形成3个细胞柱，分别为m柱、l柱和5柱。m柱和l柱分别纵向延伸至C1和C2内侧核和腹外侧核，从C2中部延伸至C6中部。这些柱由运动神经元组成，它们的轴突穿过SAN，并在C2尾部合并，形成脊髓副核。柱-5由穿过CSN的运动神经元组成，在腹外侧核中靠近柱- l，从C3向C5纵向延伸。支配胸锁乳突肌、锁乳突肌、锁斜方肌、肩斜方肌和棘斜方肌的运动神经元在脊髓副核和第5柱中呈背侧向体位分布，但在第5柱中未发现胸锁乳突肌运动神经元。
The sternocleidomastoid and trapezius muscles of the rat, which are innervated by the spinal accessory nerve (SAN) and cervical spinal nerve (CSN), consist of 5 smaller muscles: the sternomastoid, cleidomastoid, clavotrapezius, acromiotrapezius and spinotrapezius. The location of cell somata of the motoneurons supplying each of these smaller muscles and the peripheral course of their axons were studied by the horseradish peroxidase retrograde axonal transport technique (the HRP method) in combination with cutting of the SAN. The sternocleidomastoid and trapezius motoneurons formed 3 cell columns, column-M, -L and -5, in the ipsilateral ventral horn of the cervical spinal cord. Column-M and-L extend longitudinally in the medial mucleus of C1 and C2 and in the ventrolateral nucleus from the middle of C2 to the middle of C6, respectively. These columns consist of the motoneurons whose axons pass through the SAN and they merge in the caudal C2 to constitute the spinal accessory nucleus. Column-5, which consists of the motoneurons passing through the CSN, extends longitudinally from C3 to C5 close to column-L in the ventrolateral nucleus. Motoneurons supplying the sternomastoid, cleidomastoid, clavotrapezius, acromiotrapezius and spinotrapezius muscles showed a rostrocaudal somatotopic distribution in the spinal accessory nucleus and in column-5 in this order, though the sternomastoid motoneurons were not found in column-5.