Neck pain is a common clinical condition of some diseases that affect the soft tissues, musculotendinous structures and joints of the cervical spine. It is characterized by pain in the posterior and lateral muscles of the neck, muscle contractures and partial functional impotence. An important finding is that approximately 60% of total cervical rotation takes place at C1-C2, regardless of age. The test used to diagnose dysfunction of the upper cervical spine is the Cervical Rotation Flexion Test (CRFT) and is measured in degrees through various instruments, the most current validated by scientific literature are mobile applications (Clinometer and Compass ). Having in clear the importance of the location (C1-C2) of the origin of many of the symptoms and signs that cervicalgia generates and mainly the restriction of the range of movement that they produce in the cervical spine. It is that the manual therapy technique: Joint mobilization post muscular inhibition (MAEPI) that is included in this study for its analysis, is directed to this segment of the cervical spine. This differs from other similar techniques, in terms of location and movement of the joint surfaces, which have been previously studied and have shown their effectiveness (techniques that will be used in the control group), in that the micro movements of the joint surfaces ( joint arthrokinematics) based on the principles of Kaltenborn-Evjenth will be combined with the principles of the hold relax technique belonging to the Proprioceptive Neuromuscular Facilitation method. The main therapeutic objective of the MAEPI technique is to improve mobility and reduce pain in the cervical spine. Hypothesis: The MAEPI technique will improve mobility and reduce neck pain as well as other symptoms associated with neck pain, such as headache, dizziness and nausea, and will be more effective than those of the control group (Maitland central posterior-anterior passive joint mobilization in C2 and natural apophyseal slippage sustained (SNAG) in rotation about Mulligan's C1). The MAEPI technique will be more effective when applied later to myofascial induction techniques.