The digastric muscle has dual innervation. The muscle bellies both travel towards the hyoid bone and connect via the intermediate tendon, a fibrous tissue sling that is anchored to the superior aspect of the body of hyoid bone. The anterior belly arises from the digastric fossa of the lower border of mandible.
![neck diagrams. neck diagrams.](https://i.ytimg.com/vi/DkQS0brsEp8/maxresdefault.jpg)
The posterior belly arises from the medial surface of mastoid notch, a deep groove found on the mastoid process of temporal bone.The muscle is composed of a posterior and an anterior belly, connected by an intermediate tendon, which represents their common insertion point. The digastric muscle is a small muscle situated below the mandible, that extends from the mastoid process of temporal bone to the chin. When the head and neck are fixed, the sternocleidomastoid can also elevate the sternum and clavicle and thereby expand the thoracic cavity during forced inspiration. Bilateral contraction of the sternocleidomastoid muscles produce flexion of the neck, drawing the head towards the chest.Unilateral contraction produces lateral flexion of the neck on the same (ipsilateral) side and lateral rotation of the head to the opposite (contralateral) side.The function of the sternocleidomastoid muscle depends on whether the muscle acts alone or together with its contralateral counterpart. Vascular supply to this muscle is derived from branches of the occipital, posterior auricular, superior thyroid and suprascapular artery. The sternocleidomastoid muscle is innervated by the accessory nerve (CN XI) and anterior rami of spinal nerves C2 and C3. The heads come together and ascend diagonally to insert onto the mastoid process of the temporal bone. Its clavicular head originates from the medial third of the clavicle, while its sternal head arises from the manubrium of sternum. The sternocleidomastoid is a large, two-headed muscle of the neck.
![neck diagrams. neck diagrams.](https://i2.wp.com/www.snotboards.com/stratbare1.jpg)
Superficial layer: Trapezius, splenius capitis, splenius cervicisĭeep layer: Cervical transversospinales muscles (semispinalis capitis, semispinalis cervicis)ĭeepest layer: Suboccipital muscles (rectus capitis posterior major, rectus capitis posterior minor, obliquus capitis superior, obliquus capitis inferior) Scalene muscles: Anterior scalene, middle scalene, posterior scalene muscles Infrahyoid muscles: Sternohyoid, sternothyroid, thyrohyoid, omohyoidĪnterior vertebral muscles: Rectus capitis, longus capitis, longus colli Suprahyoid muscles: Digastric, mylohyoid, geniohyoid, stylohyoid Superficial muscles: Platysma, sternocleidomastoid This article will introduce you to the anatomy of the muscles of the neck.Ī large group of muscles in the cervical area, responsible for the movement of the head in all directions The muscles of the neck are closely related to a number of important structures that pass between the thorax and the head, including major blood vessels, nerves and elements of the respiratory and gastrointestinal systems. For example, the muscles in the posterior neck are responsible for extension of the neck.
![neck diagrams. neck diagrams.](https://i.ytimg.com/vi/Aal1vAvNySA/maxresdefault.jpg)
The position of a muscle or group of muscles in the neck generally relates to the function of the muscles.
![neck diagrams. neck diagrams.](https://c.imgz.jp/754/66749754/66749754_8_d_500.jpg)
The musculature of the neck is further divided into more specific groups based on a number of determinants including depth, precise location and function. They consist of 3 main groups of muscles: anterior, lateral and posterior groups, based on their position in the neck. These muscles are mainly responsible for the movement of the head in all directions. Bar chords are tricky at first but once you get used to them you'll be able to play almost any guitar chord you need for many thousands of songs.The muscles of the neck are muscles that cover the area of the neck. The same chord pattern is used and just moved along the guitar neck to start on any root note. The great thing about barre chords is you only need to learn a few shapes because they are moveable chords. These things happen naturally and when they do you will find you no longer need to use chord charts because you can figure any chord type very quickly yourself.įirst are the open chords and then move onto barre chords. In reality it's not like that, yes there are thousands of ways to play all the different chords on the guitar, many more in fact than what's shown on this Website.Īs you get more experienced at playing guitar you will learn more about chord construction, the notes within the chords and also learn your way around the fretboard.
#Neck diagrams. how to
If you are a beginner to guitar then you might find the subject of guitar chords quite daunting, how are you supposed to learn that amount of chords and remember how to play them all on the guitar.