Yes
Yes
A bulging disc in the neck typically cannot travel or migrate to the lower back. However, the same factors that contribute to disc issues in the neck (such as aging, injury, and poor posture) can also affect the discs in the lower back separately. It is important to address any disc issues in both the neck and lower back to prevent further complications.
The occiput is the lower part of the back of your head, just above the neck.
upper neck / lower head
To strengthen the back of your neck muscles, you can try exercises like neck extensions, neck flexions, and isometric neck exercises. These exercises can help improve the strength and stability of the muscles in the back of your neck.
Both arms, hands, the back of his neck, and lower abdomen
To strengthen the muscles in the back of your neck, you can do exercises like neck extensions, chin tucks, and shoulder blade squeezes. These exercises help improve neck strength and posture.
It is very common for the larger muscles in the back to go into spasm following a lower spinal/back injury. A lot of people will experience pain right up to and often including the neck as these muscles lock up. To reduce this type of pain, help from a physiotherapist can be beneficial as can taking pain relief with an anti-inflammatory such as ibuprofen with a small amount of codeine.
Shoulders (and back i guess)
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Both cat and cow yoga poses will help your neck muscles. Both require you to arch your back during the course of the exercise, thus relieving neck tension.