The rat is anesthetized and pleced in the stereotaxic frame. But both heads of the stereotaxis are needed for other purposes. I'v heard that the administration can be carried out without stereotaxis. But how do I do that?

I saw this video, but our institution haven't had access to Jove.

https://www.jove.com/video/53308/intracerebroventricular-injection-amyloid-peptides-normal-mice-to

https://www.jove.com/video/53308/intracerebroventricular-injection-amyloid-peptides-normal-mice-to