The cribriform plate is narrow with deep grooves supporting the olfactory bulb, and is perforated by olfactory foramina allowing the passage of the olfactory nerves. The foramina in the middle of the groove are small and allows the passing of the nerves to the roof of the nasal cavity. The foramina at the medial part of the groove allow the passage of the nerves to the upper part of the nasal septum while the foramina at the lateral part transmit the nerves to the superior nasal concha.