 Welcome back to our med smarter question of the week where we're taking a smarter approach to preparing future physicians Before we get started if you'll take just a quick minute and click that like button and also Subscribe and turn the bell on so that you'll be notified when we post new videos Let's get right to that question. As always we start with the last sentence of the vignette, and then we'll go back and read the rest If this infant has met all her developmental milestones appropriately, how old is she? A female infant presents to the pediatrician for a routine checkup. Her father reports that she plays peek-a-boo at home Waves bye-bye, and will say Dada She cannot yet drink from a cup. She seemed somewhat apprehensive when the physician entered the room She can lift her head when lying on her stomach. She can sit unassisted and stand with help She has a positive Babinski's reflex if they've met all the developmental milestones. How old is she? Take a look at these answer choices read the question again Come up with an answer and write it in the comment box below So this question is asking simple understanding of developmental milestones So we've said that they this infant has met all of her developmental milestones appropriately So she hasn't missed a developmental milestone meaning that she would be older but showing a younger development based on the milestones Therefore, this is a simple understanding of do you or do you not know these milestones? So here are some of the milestones Plays peek-a-boo waves bye-bye says Dada Doesn't drink from a cup. That's to help you rule out some other milestones that she's not yet at Apprehensive when the physician entered the room. That's kind of a stranger anxiety Can lift head up when lying on stomach can sit unassisted and stand with help So we don't have anything about walking We know walking usually sometime in the 12 to 15 month range a little bit later sometimes So what that tells me is meeting normal developmental milestones not walking rules out anything beyond that 12 to 15 month range So 12 to 15 18 and 24 would be out just from that one particular Sign and symptom there having a positive Babinski's reflex Typically that disappears right around your 12 month range so that also continues to Reaffirm that CD&E are not our correct answer. So therefore going back peek-a-boo bye-bye Dada so Fairly advanced having some some words that they're able to do and an understanding there Not gonna be a four to five month old four to five months old do not usually say Peek-a-boo bye-bye. They can sit with some support, but some more those motor developments the And the and the verbal developments are a little too young for that four to five month range Therefore it is no longer an option for us. So that leaves B 7 to 11 months as my final answer on this question and 7 to 11 months is the correct answer as we describe going through each every one of these individual milestones You can narrow it down to see where we have an issue or where we have a patient that lies on the developmental milestone chart So we're seeing motor social verbal and cognitive skills on all of this patients in that 7 to 11 month range Okay, so we said they should be able to sit alone They crawl they stand with aid so they'll be holding on to a couch or a table or someone's hand This patient is playing peek-a-boo and having stranger anxiety, which is age-appropriate social skills and then verbal and cognitive skills like saying data even if it's not really Understanding who data is but it's just having those words is a good milestone for that 7 to 11 month range And like we said earlier, but Ben skis Typically disappears by around 12 months of age so the presence of it in that 7 to 11 month range is normal and it is not pathological If you found this material helpful for your studying, please like and consider subscribing to the channel Also, share this video so that more people can benefit from it like you have