Maybe. The fact is that the brain is supplied with blood from four arteries: two vertebrates and two sleepy arteries, which are connected to each other at the base of the brain in the Ring of Will and then feed the brain with blood. Often, during the examination, we see an insufficient supply of blood to the brain. This is called vertebrobasilar insufficiency, and as a result ischemia (poor blood supply) of the brain. This is the reason for the development of many diseases of the brain. And the root cause may be spasms of the arteries feeding the brain, as a result of damage to the cervical vertebrae.
Psychosomatics arises in connection with any stimuli on the central nervous system, especially if such stimuli are physiological problems and pain. If the human psyche is not stable and not adaptive to stress, a psychosomatic state will actively develop, which further exacerbates physiological problems, which gives rise to a vicious "snowball" of hypochondria.
There is no direct connection, but there are prerequisites - for example, prolonged pain, compression of the arteries by the neck muscles, which lead to the development of psychosomatics, depression and neuroses
There is no direct causal relationship between protrusion, hernias of the cervical and thoracic spine and the development of depression and psychosomatics. Fortunately, no. But there are quite a few people who believe in this, even among specialists (neurologists)
Of course it can. Any disease, with an inadequate attitude towards it of a sick person and a tendency to self-reflection, easily leads to depression, neuroses and psychosomatics.