7 months old baby has few beats of clonus in her sleep only, between 4-8 and cant be illicited every time. when she was under 3 months it used to happen awake and asleep, had brain mri and was normal, is it an immature nervous system?

I expect ankle clonus in infants as sign of an immature nervous system. I expect it to fade by the time they begin to walk. I am confused why anyone would get an MRI for ankle clonus. If you are talking about another reflex, not the ankle, you are not describing it in ways the words are commonly used. You are welcome to start over, but I see no reason to worry about ankle clonus at this age.

Your daughter's nervous system is still developing. The sleep and wake patterns usually are more mature by age 7 month and most infants sleep through the night. Discuss a thorough evaluation of her neurologic examination and development with your pediatrician. A virtual consult with Healthtap is available. Watch for eye rolling and arching.