Neuromodulatory unpaired median neurons in the New Zealand tree weta, Hemideina femorata.
Neuromodulatory unpaired median neurons in the New Zealand tree weta, Hemideina femorata.
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新西兰树沙螽 (Hemideina femorata) 中的神经调节未配对中位神经元。
DOI：
10.1016/j.jinsphys.2011.07.010
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发表时间：
2011
影响因子：
2.2
通讯作者：
Currie M.J
中科院分区：
文献类型：
--
作者：
Pflueger H.J.;Field;L.H.;Nishino H.;Currie M.J
湿地是古冈瓦纳直翅目（Anostostomatidae），有许多物种是新西兰特有的。像所有直翅目，他们拥有传出神经调节背不成对正中（DUM）神经元，与两侧对称的轴突，这是运动网络的重要组成部分。这些神经元产生过冲动作电位，并且容易受到递送到身体和附属物的各种外部机械感觉刺激的刺激。特别地，刺激触角、嘴部、腿的跗部和股骨、腹部、尾索和产卵器在激活湿胸后神经节中的DUM神经元方面非常有效。此外，隐约可见的视觉刺激或光开、光关刺激激发许多后胸DUM神经元。这些DUM感觉反射通路仍然可行后，前胸食管下连接被切断，而在蝗虫这样的反射通路被中断的消融。这表明，在湿，DUM激活的感觉反射途径组织在一个不太集中的方式比蝗虫，因此可能反映了一个plesiomorphic的进化状态的湿。此外，许多weta DUM神经元表现出缓慢的节律性爆发，这也持续连接消融后。
Wetas are ancient Gondwanan orthopterans (Anostostomatidae) with many species endemic to New Zealand. Like all Orthoptera they possess efferent neuromodulatory dorsal unpaired median (DUM) neurons, with bilaterally symmetrical axons, that are important components of motor networks. These neurons produce overshooting action potentials and are easily stimulated by a variety of external mechanosensory stimuli delivered to the body and appendages. In particular, stimulation of the antennae, mouth parts, tarsi and femora of the legs, abdomen, cerci and ovipositor is very effective in activating DUM neurons in the metathoracic ganglion of wetas. In addition, looming visual stimuli or light on-, light off-stimuli excite many metathoracic DUM neurons. These DUM sensory reflex pathways remain viable after the prothoracic to subesophageal connective is cut, whereas in locusts such reflex pathways are interrupted by the ablation. This suggests that, in wetas, sensory reflex pathways for DUM activation are organized in a less centralized fashion than in locusts, and may therefore reflect a plesiomorphic evolutionary state in the weta. In addition, many weta DUM neurons exhibit slow rhythmic bursting which also persists following the connective ablation.