Ashdown R R, Barnett S W, Ardalani G
Vet Rec. 1982 Apr 10;110(15):349-56. doi: 10.1136/vr.110.15.349.
Six boars were deficient in penile erection and incapable of intromission, but produced ejaculates containing spermatozoa. In five of these boars impotence was primary, but one boar had served normally for two seasons before showing secondary impotence. Sexual libido was good in two, moderate in two and poor in two of these animals. Post mortem studies on the reproductive tracts revealed no abnormalities except in the penes. In one of the boars with primary impotence, the penis showed an abnormal type of spiral deviation during simulated erection, but there was no abnormality in the venous drainage of the organ. In the other five boars, injection experiments revealed venous drainage of the corpus cavernosum penis (ccp) into the dorsolateral (left) tributary of the v dorsalis penis. In four cases, the apical cavernous spaces of the ccp communicated with the vascular spaces of the corpus spongiosum glandis. No direct communications with the corpus spongiosum penis (csp) were demonstrated but the csp was injected from the ccp indirectly, by way of the dorsal venous system. It is suggested that these abnormalities may have been the immediate cause of impotence in these five boars. This possibility is discussed in relationship to the processes of erection and ejaculation and to various clinical signs shown by these animals. The abnormalities of venous drainage were thought to be developmental in origin and the condition may be inherited.
六头公猪阴茎勃起功能不足，无法进行插入，但能产生含有精子的射精。在这些公猪中，有五头的阳痿是原发性的，但有一头公猪在出现继发性阳痿之前，已经正常配种两个季节。这些动物中，两头性欲良好，两头中等，两头较差。对生殖道的尸检研究表明，除阴茎外没有异常。在一头原发性阳痿的公猪中，阴茎在模拟勃起时出现异常的螺旋状偏差，但该器官的静脉引流没有异常。在其他五头公猪中，注射实验显示阴茎海绵体（ccp）的静脉引流进入阴茎背侧（左侧）分支。在四例中，ccp的顶端海绵体间隙与尿道海绵体的血管间隙相通。未发现与阴茎海绵体（csp）有直接连通，但csp通过背静脉系统从ccp间接注入。提示这些异常可能是这五头公猪阳痿的直接原因。结合勃起和射精过程以及这些动物表现出的各种临床症状，对这种可能性进行了讨论。静脉引流异常被认为起源于发育过程，这种情况可能是遗传性的。
