Information about Omohyoid
| Omohyoid muscle | ||
|---|---|---|
| Side of neck, showing chief surface markings. (Omohyoideus visible at center.) | ||
| Muscles of the neck. Anterior view. Omohyoid is labeled on both sides. | ||
| Latin | musculus omohyoideus | |
| subject #112 392 | ||
| Origin: | Upper border of the scapula | |
| Insertion: | Hyoid bone | |
| Artery: | ||
| Nerve: | Ansa cervicalis | |
| Action: | Depresses the larynx and hyoid bone. Also carries hyoid bone backward and to the side. | |
| Dorlands/Elsevier | m_22/12549956 | |
Structure
It arises from the upper border of the scapula, and occasionally from the superior transverse scapular ligament which crosses the scapular notch, its extent of attachment to the scapula varying from a few millimetres to 2.5 cm.From this origin, the inferior belly forms a flat, narrow fasciculus, which inclines forward and slightly upward across the lower part of the neck, being bound down to the clavicle by a fibrous expansion; it then passes behind the Sternocleidomastoideus, becomes tendinous and changes its direction, forming an obtuse angle.
It ends in the superior belly, which passes almost vertically upward, close to the lateral border of the Sternohyoideus, to be inserted into the lower border of the body of the hyoid bone, lateral to the insertion of the Sternohyoideus.
The central tendon of this muscle varies much in length and form, and is held in position by a process of the deep cervical fascia, which sheaths it, and is prolonged down to be attached to the clavicle and first rib; it is by this means that the angular form of the muscle is maintained.
Triangles
The inferior belly of the Omohyoideus divides the posterior triangle of the neck into an upper or occipital triangle and a lower or subclavian triangle.Its superior belly divides the anterior triangle into an upper or carotid triangle and a lower or muscular triangle.
The Omohyoid muscle is proximally attached to the scapula and distally attached to the hyoid bone.
Variations
Doubling; absence; origin from clavicle; absence or doubling of either belly.Innervation
The omohyoid is innervated by a branch of the cervical plexus, and mostly acts to stabilise the hyoid bone.Additional images
) Hyoid bone. Anterior surface. Enlarged. | ) Left scapula. Dorsal surface. | Section of the neck at about the level of the sixth cervical vertebra. Showing the arrangement of the fascia coli. | Muscles of the neck. Lateral view. |
Superficial dissection of the right side of the neck, showing the carotid and subclavian arteries. | The veins of the neck, viewed from in front. | Hypoglossal nerve, cervical plexus, and their branches. | The right brachial plexus with its short branches, viewed from in front. |
The omohyoid muscle is innervated by the ansa cervicalis from the cervical plexus (C1-3)
External links
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.Muscles of head and neck: the neck | |
|---|---|
| CERVICAL | platysma - sternocleidomastoid |
| SUPRAHYOID | digastric - stylohyoid - mylohyoid - geniohyoid |
| INFRAHYOID/STRAP | sternohyoid - sternothyroid - thyrohyoid - omohyoid |
| VERTEBRAL — ANTERIOR | longus colli - longus capitis - rectus capitis anterior - rectus capitis lateralis |
| LATERAL | scalene (anterior - medius - posterior) |
Latin}}}
Official status
Official language of: Vatican City
Used for official purposes, but not spoken in everyday speech
Regulated by: Opus Fundatum Latinitas
Roman Catholic Church
Language codes
ISO 639-1: la
ISO 639-2: lat
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Official status
Official language of: Vatican City
Used for official purposes, but not spoken in everyday speech
Regulated by: Opus Fundatum Latinitas
Roman Catholic Church
Language codes
ISO 639-1: la
ISO 639-2: lat
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bold refer to the diagram at right.)
In the skull (8):
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In the skull (8):
- 1-9. cranium
- 7. mandible
- malleus
- incus
- stapes
- hyoid
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Of the three borders of the scapula, the superior border (or superior margin) is the shortest and thinnest; it is concave, and extends from the medial angle to the base of the coracoid process.
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bold refer to the diagram at right.)
In the skull (8):
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In the skull (8):
- 1-9. cranium
- 7. mandible
- malleus
- incus
- stapes
- hyoid
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The hyoid bone (Lingual Bone) is a bone in the human neck, and is the only bone in the skeleton not articulated to any other bone. It is supported by the muscles of the neck and in turn supports the root of the tongue.
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Arteries are muscular blood vessels that carry blood away from the heart.[1] All arteries, with the exception of the pulmonary and umbilical arteries, carry oxygenated blood.
The circulatory system is extremely important for sustaining life.
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The circulatory system is extremely important for sustaining life.
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- Accessory nerve
- Accessory obturator nerve
- Alderman's nerve
- Anococcygeal nerve
- Ansa cervicalis
- Anterior interosseous nerve
- Anterior superior alveolar nerve
- Aortic plexus
- Auerbach's plexus
- Auriculotemporal nerve
- Axillary nerve
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The ansa cervicalis (or ansa hypoglossi in older literature) is a loop of nerves that are part of the cervical plexus.
Branches from the ansa cervicalis innervate the infrahyoid muscles except the thyrohyoid muscle: the sternohyoid muscle, the sternothyroid muscle,
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Branches from the ansa cervicalis innervate the infrahyoid muscles except the thyrohyoid muscle: the sternohyoid muscle, the sternothyroid muscle,
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Kinesiology is the scientific study of the anatomy, physiology, and mechanics of body movement, especially in humans. [1] The word kinesiology is derived the Greek "kinesis" (motion) + the suffix -ology or -logy from the greek "logos" or "logia"(meaning a field of study).
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Elsevier, the world's largest publisher of medical and scientific literature, forms part of the Reed Elsevier group. Based in Amsterdam, the company has substantial operations in the UK, USA and elsewhere.
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MUSCLE (multiple sequence comparison by log-expectation) is public domain, multiple sequence alignment software for protein and nucleotide sequences.
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The neck is the part of the body on many limbed vertebrates that distinguishes the head from the torso or trunk.
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Anatomy of the human neck
Bony anatomy: The cervical spine
The cervical portion of the human spine..... Click the link for more information.
A tendon (or sinew) is a tough band of fibrous connective tissue that connects muscle to bone and is built to withstand tension. Tendons are similar to ligaments except that ligaments join one bone to another.
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The infrahyoid muscles are a group of four pairs of muscles in the anterior part of the neck. (The term infrahyoid refers to the region below (inferior) to the hyoid bone in the neck.
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scapula, or shoulder blade, is the bone that connects the humerus (arm bone) with the clavicle (collar bone).
The scapula forms the posterior part of the shoulder girdle. In humans, it is a flat bone, roughly triangular in shape.
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The scapula forms the posterior part of the shoulder girdle. In humans, it is a flat bone, roughly triangular in shape.
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The superior transverse ligament (transverse or suprascapular ligament) converts the scapular notch into a foramen.
It is a thin and flat fasciculus, narrower at the middle than at the extremities, attached by one end to the base of the coracoid process, and
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It is a thin and flat fasciculus, narrower at the middle than at the extremities, attached by one end to the base of the coracoid process, and
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The suprascapular notch (or scapular notch) is a notch in the lateral part of the upper border of the scapula, just next to the base of the coracoid process.
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Fasciculus can refer to:
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- nervous tissue
- Arcuate fasciculus
- Dorsal longitudinal fasciculus
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In human anatomy, the sternocleidomastoid (pronounced /ˌstɚ.noˌkli.dəˈmæs.tɔɪ̯d/) muscles are anterior muscles in the neck that act to flex and rotate the head.
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The sternohyoid muscle is a thin, narrow muscle attaching the hyoid bone to the sternum, one of the paired strap muscles of the infrahyoid muscles serving to depress the hyoid bone. It is innervated by the ansa cervicalis.
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The hyoid bone (Lingual Bone) is a bone in the human neck, and is the only bone in the skeleton not articulated to any other bone. It is supported by the muscles of the neck and in turn supports the root of the tongue.
..... Click the link for more information.
..... Click the link for more information.
The sternohyoid muscle is a thin, narrow muscle attaching the hyoid bone to the sternum, one of the paired strap muscles of the infrahyoid muscles serving to depress the hyoid bone. It is innervated by the ansa cervicalis.
..... Click the link for more information.
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A tendon (or sinew) is a tough band of fibrous connective tissue that connects muscle to bone and is built to withstand tension. Tendons are similar to ligaments except that ligaments join one bone to another.
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- Collarbone and collar bone redirect here. The eye abnormality is correctly spelled coloboma.
- This article uses some professional terms to describe relative positions and directions.
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The posterior triangle (or lateral cervical region) is a region of the neck.
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Boundaries
It has the following boundaries:- in front, by the posterior border of the Sternocleidomastoideus
- behind, by the anterior border of the Trapezius
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The occipital triangle, the larger division of the posterior triangle, is bounded, in front, by the Sternocleidomastoideus; behind, by the Trapezius; below, by the Omohyoideus.
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The subclavian triangle, the smaller division of the posterior triangle, is bounded, above, by the inferior belly of the Omohyoideus; below, by the clavicle; its base is formed by the posterior border of the Sternocleidomastoideus.
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The anterior triangle is bounded, in front, by the middle line of the neck; behind, by the anterior margin of the Sternocleidomastoideus; its base, directed upward, is formed by the lower border of the body of the mandible, and a line extending from the angle of the mandible to
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The carotid triangle (or superior carotid triangle) is a portion of the anterior triangle of the neck.
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Coverings and boundaries
It is bounded:- behind by the Sternocleidomastoideus;
- below, by the superior belly of the Omohyoideus
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The inferior carotid triangle (or muscular triangle), is bounded, in front, by the median line of the neck from the hyoid bone to the sternum; behind, by the anterior margin of the Sternocleidomastoideus; above, by the superior belly of the Omohyoideus.
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