Ostroumova N K, Guliaev D V, Sakharov D A
Neirofiziologiia. 1977;9(5):539-42.
The pharyngeal retractor muscle of Helix lucorum is innervated by two symmetrical nerves which contain axons of two types forming myoneural junctions with the muscle cells. Type I junctions correspond to thick axons. These axon terminals which contain a large number of spherical, clear vesicles (41 +/- 5 nm) and a smaller number of dense-cored vesicles (67 +/- 3 nm) make contacts mainly with noncontractile sarcoplasmic processes of muscle cells. Type II junctions correspond to thin axons containing many of granules. Their axon terminals contact with contractile parts of muscle cells and contain a heterogenous population of vesicles: small spherical clear vesicles (44 +/- 2 nm), dense-cored vesicles and numerous irregularly outlined granules with fine-granular content (135 +/- 5 nm). Space between muscle cell is usually wide (50 nm and more) with the exception of sarcoplasmic processes where the gap may be less than 10 nm.
皱襞螺的咽牵开肌由两条对称的神经支配，这两条神经包含两种类型的轴突，它们与肌细胞形成肌神经连接。I型连接对应粗轴突。这些轴突终末含有大量球形、清亮小泡（41±5纳米）和少量有致密核心的小泡（67±3纳米），主要与肌细胞的非收缩性肌浆突起接触。II型连接对应含有许多颗粒的细轴突。它们的轴突终末与肌细胞的收缩部分接触，并含有多种类型的小泡：小的球形清亮小泡（44±2纳米）、有致密核心的小泡和许多轮廓不规则、内含细颗粒的颗粒（135±5纳米）。肌细胞之间的间隙通常较宽（50纳米及以上），但肌浆突起处的间隙可能小于10纳米。
