An 8 month old female infant has history of kernicterus. On sudden movement of the baby’s neck, the following features were seen - abduction and extension of the arms, opening of hands and adduction of arms in front of the body. Which lobe of the baby’s brain is affected?

Primitive reflexes, also known as frontal release signs, can be normal in the adult population. Multiple frontal release signs observed on neurological examination correlate with frontal lobe brain pathology, including Alzheimer disease, multiple sclerosis, and schizophrenia.