Head and neck muscle anatomy

2021-02-09 12:00 AM

The neck is divided into two regions where the boundary is the outer edge of the trapezium, the posterior region is the posterior neck region or the nape region.

Head muscles

Based on embryonic function as well as the origin, head muscles are divided into two groups: facial muscles and chewing muscles.

Facial muscles

The facial muscles, often called the dermal muscles, are the means of expressing affection and opening and closing the natural openings of the head and face area. The muscles of the face have the following properties.

There are principals in the bones and in the skin.

Nerves of the face govern movement.

Stick around natural holes.

The facial muscles are divided into groups:

Muscles on the skull: two muscles.

Ear muscles: there are three muscles that are very underdeveloped

Ocular muscle: consists of three muscles. Of the three muscles of the eye muscle group, the eye sphincter is important to close the eyes, so when the nerve that is controlling this muscle, the facial nerve is damaged, the eye cannot close.

Nasal muscle group: includes underdeveloped muscles.

Oral muscle: includes many muscles because the mouth works a lot: the mouth sphincter, the upper lip lift, the lower lip ...

Chewing muscles

Consists of four muscles that share the following properties:

The principle in the skull mass, sticking to the lower jaw bone.

The lower jaw nerve dominates the movement.

The effect is to move the lower jaw.

Temporal muscle: primitive in the temporal fossa, clinging to the lower jaw bone parrot, fan-shaped, covering most of the side of the skull.

Muscles bite: primitive in the arch of the cheekbones, sticking to the outer surface of the jaw branch and the angle of the jaw.

The inner calf muscle: the primitive is in the inner surface of the apex fragment, adhering to the inner surface of the jaw branch and the jaw angle.

The calf muscle: the primitive is on the outer surface of the butterfly's tip, attaching to the neck of the lower jaw and covering the joint of the temporal joint - the lower jaw.

Head and neck muscle anatomy

Figure. Head muscles

1. Occipital muscles.

2. 4. Eye sphincter.

3. Slim muscles.

5. Small cheekbones.

6. Big cheekbones.

7. Lower septum muscle.

8. Sphincter.

9. Lower lip muscle.

10. Chin's muscle.

11. Upper cranial muscle.

12. Upper ear muscle.

13. Anterior ear muscle.

14. Upper lip lift muscle.

15. Nasal muscle.

16. Upper lip lifts.

17. Corner lift muscle.

18. Laugh muscle.

19. Lower mouth muscle.

20 Muscles cling to the skin of the neck.

Neck muscles

The neck is divided into two regions where the boundary is the outer edge of the trapezoidal. The posterior region is the posterior neck region or the nape region of the neck; The anterior region is the anterior neck area, often referred to as the neck area.

Muscles of the nape

The muscles of the nape of the neck are composed of many muscles.

The anterior neck muscles

Depending on the function and position, people divide the anterior cervical muscles into groups: superficial groups, claw muscles, and deep muscles.

Head and neck muscle anatomy

Figure. Neck muscles

1. Sternum muscle.

2. Knee muscle.

3. Staircase.

4. Shoulder lift muscle.

5. Middle ladder muscle.

6. Lower belly to nail muscle.

8. Abdominal anterior biceps.

9. Nail jaw muscle.

10. Claw muscle.

11. Tummy on the nail shoulder muscles.

12. Nail sternum. 

Shallow muscle group:

There are two muscles: the neck muscles and the sternum muscles.

The sternum muscle is an important anatomic landmark in the neck area. Primary in the sternum and collarbone. The muscle fibers run up and back to reach the tip and occipital bone.

The sternum muscle is driven by the accessory nerve. When the muscles contract, the effect of turning the head and pulling it to that side. If it is pulled on both sides, it can help to tilt the head.

Background muscle group:

Consists of two groups: on the nail and under the foundation.

The muscles on the nail: forming the floor of the mouth. The muscles of the nail are to bring the nail bone and the base of the tongue upwards.

The muscles under the nail: have the effect of lowering the nail and larynx, which are the muscles of the nail plate, thymus, the nail plate, and the nail plate.

The pectoral and thymus muscles have different directions and form a diamond in the middle called a tracheostomy.

Deep muscle group:

Including muscles of the lateral spine: anterior ladder muscle, middle step muscle of posterior bladder muscle; muscles anterior spine.