[Use of "non-standard" young rabbits of the chinchilla breed for determination of the stereotaxic coordinates of brain structures].

It has been found that differences in the distances from the brain structures to orienting points on the scull of non-standard rabbits considerably exceed those in the distances between the brain structures of the same animals. In non-standard rabbits of one and the same age, the quantitative differences of the rostral or caudal location of all brain structures in relation to the bone orienting points are more significant than those in the lengths of the brain. Intravital determination of a point on the surface of the scull with horizontal coordinates of the anterior commissure is suggested for selection of young rabbits with a normal location of brain structures in regard to the zero point (bregma ) as well as for introduction of corrections in the location of the zero points. It is also suggested that this point be used directly as the zero point of reading the coordinates instead of the bregma.