Its bone architecture consists of 7 vertebrae and 6 intervertebral discs (IVDs) that are fibro-cartilaginous in nature. (no disc between the occipital and the atlas…).

OBADIA offers, in exclusive collaboration with the MYODISK centre, Neuro-Vertebral Decompression (DNV), a unique procedure in France. The technique was born in Canada in the 1990s, and consists of unloading the discs and thus opening the conjugate holes from which the nerves coming from the spinal cord come out.

DNV tables have evolved to date, and are bringing very good results: this is the beginning of the era of "computerized osteopathy".

The cervical spine is wider and wider from top to bottom, at the level of transverse apophyses. It is an important area of muscle insertions (Scalènes, SCOM…) for head mobility in particular.

Brachial plexus is the meeting of the anterior branches of the last four cervical nerves (C5, C6, C7, C8) and the first thoracic nerve (T1)

It contains the spinal cord, whose extension at the level of the top 3 cervical floors (C5, C6, C7), and the 1s^{t d}orsal vertebra (D1), gives birth to the cervico-brachial nervous plexus via the anterior branches for innervation of the muscles of the upper limbs.

It is related to the ENT sphere, through the larynx and pharynx (crossroads of the digestive and respiratory tracts), and plays a role in phonation and swallowing. Indeed, it delivers forward to the trachea and back to the esophagus.

It contains the thyroid gland, the biological clock that rhythms our body.

From a vascular point of view, it drains venous blood from the sigmoid sinus (skull) through the internal jugular vein essentially, which comes out at the level of the posterior torn hole.

The brain feeds through the forward carotid arteries from the brachiocephalic trunk above the heart (aorta stick), and the back vertebral arteries, which enter the occipital hole, to form the Willis polygon. They are real highways to bring essential nutrients to the brain (oxygen, glucose…), to reach the blood-brain barrier, in the endothelium of the walls of the vessels, which will act as a filter for the Central Nervous System (CNS). Muscle tension in the neck may interfere with blood flow to the brain and its brains, and cause migraines, or tension headaches. Note also the existence of the large occipital nerve, also called Arnold's nerve, which comes out at the le^vel of the 2nd cervical vertebra, and which creates when it ignites the famous Arnoldite, or pain in a helmet that radiates behind the head unilaterally more often than not.

These pains are indications in Osteopathy, and the results are often immediate.

At the vegetative level, we note the presence of the sympathetic paravertebraal node chain, related to the nerves derived from the spinal cord by the communicating twigs: the white, myelinated, numbering 14, starts from the spinal nerves (Central Nervous System) to the sympathetic trunks (Vegetative Nervous System), and the grays, not myelinated, number 31, bring back information from the viscera in particular (SNV) to the 31 pairs of spinal nerves (CNS).

The nerves of the SNV are destined for blood vessels, glands (lacrymals, salivary, etc.), the diaphragm (phrenic nerves).

The best known, the vagus nerve, or pneumogastric nerve, comes out of the skull at the posterior torn hole (jugular foramen), and is therefore part of the parasympathetic system. It contains sensitive, motor and autonomic fibers for the heart (reduces heart rate), lungs (decreases the caliber of the bronchi) and the stomach (secretion of gastric juice).

For all these reasons, the Osteopath will rigorously test the good joint mobility of the neck area, in order to find cause-and-effect links with the patient's symptoms.