The cribriform plate connects

Cribriform plate of ethmoid bone separates the anterior cranial fossa from nasal cavity. Anteriorly articulates with frontal bone, at frontoethmoidal suture, marked in the median plane as foramen caecum, which is usually blind. Anteriorly, cribriform plate has midline projection, called crista galli. On each side of crista galli, there are foramina through which anterior ethmoidal nerve and vessels pass to nasal cavity. The plate is also perforated by numerous foramina, for the passage of olfactory nerve rootlets.