This book presents a complete summary about the 12 pairs of cranial nerves (CN). They control much of the motor and sensory functions of the head and neck such as smell, sight, eye movement, and feeling in the face. The CN also control balance, hearing, and swallowing. The examination of the CN is an important part of the clinical neurological examination. Additionally, to the anatomy, extensive knowledge about further diagnostic tools are necessary such as neuroimaging, and electrophysiology.  The book is divided into three parts: a general part with anatomy and imaging, a systematic part grouping the 12 pairs of cranial nerves, and a part describing cranial nerve functions in specific conditions and diseases.