Camera input movement

Hi,

I'm new to Character Animator and I've searched for hours to find a solution to my problem,
I got a character that's permanently at 3/4 view, I'm trying to get the head of my character to move in a specific way.
Basically, the head of my character tilts backwards and forwards like i want it too but drastically moves when i turn my head from side-to-side on my webcam.
I'm wondering if there is an option to disable the input of moving my head side-to-side on the webcam to be left solely with the input of moving my head up and down.
(while still having the input to the eyes and mouth etc.)

I hope I'm being clear.
Thanks in advance.