当胚长3.2毫米(胚胎第3周)时,神经沟封闭,视窝变深,在前脑两侧形成对称的囊状突起即视泡(optic Vesicle),视泡和前脑泡相通连。在发育过程中,视泡远端继承扩大,与大脑逐渐远离,近脑端较窄形成视茎,即视神经原基。
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In contrast, the optic vesicle of S. kneri in Xinfengjiang River Reservoir and S. scherzeri in the Jialing River appears after the closure of blastopore.
嘉陵江大眼鳜视泡出现在胚孔封闭前,而鳜和斑鳜视泡出现在胚孔封闭后。
These 32 patients displayed obvious patellar ending ache and typical tenderness. Patellar bone X-ray inspection on 12 of them displayed patellar tip extension and "optic vesicle signs".
两次调查患病的32名患者中,均有髌尖疼痛症状及典型压痛体征,12个髌骨X射线检查有髌尖延长及“眼泡征”。
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