【 neck 】 : the neck has three sets of very important tubes going through it. The group is the channel in the center of the spine, which contains the main nerves of the human body -- the spinal cord. The second group was the trachea and the third was the esophagus. Neck is the trachea in the human body, many important nerves, blood vessels and lymphatic concentration, left and right carotid arteries carry blood to the head and brain, the internal jugular vein is responsible for most of the blood back to the heart, the outer jugular vein is responsible for giving away in the face and skin blood, some in humans and other animals, and these vessels is very close to the neck surface, so it's natural to become the attack target, is also vulnerable parts.
[cervical vertebra] : the cervical vertebra consists of seven vertebrae, including the atlas and axis:
The atlas is at the top of the spine, more like a ring than other vertebrae. The spine is joined to the bone at the atlas.
On the occipital bone at the base of the bone there are two ridges which are inserted into the two depressions of the atlas. Its two side
The moving joints enable the head to be raised and lowered, and the axis is immediately below the atlantoid, with a buckle into the atlantoid depression
A tethered dentate process in the groove, a tethered ring system that allows the neck to turn and look back, with a process at each vertebra
The lateral limb is called the transverse process, and the spinal artery runs through the foramen of the transverse process, which is also the fixation of the spinal muscle
At the fixed point, on the seventh vertebra there is a hook that extends backwards, called the spinous process, and above it is fixed a cervical ligament, which
It is the protrusion at the base of the neck, and you can feel it if you feel it.
[related basic muscle groups] : trapezius, scalenus, levator, sternocleidomastoid, capus, cervicalis longus, suboccipital muscles... , etc.
Trapezius: one of the large shoulder muscles. It's flat and triangular in shape,
It helps turn the head, raise and tilt the head, lift and twist the arms, and move the shoulders
To rise or not move.
2. Sternocleidomastoid: the sternocleidomastoid muscle in the neck is used when you tilt your head to the side or turn your face in the opposite direction.
3. Biceps: two biceps, one of a group of muscles that connect the base of the skull to the spine. They move your face and tilt your head from side to side.
4. Gripper levator: this muscle is attached to the upper atlas, axis, and cervical vertebrae, and above the shoulder blades below. When you put weight on your shoulder, it tightens and becomes stiff and stiff.