出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2017/12/29 22:54:22」(JST)
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| Infrahyoid muscles | |
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Muscles of the neck seen from the front. The infrahyoid muscles are coloured in violet.
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| Details | |
| Nerve | Ansa cervicalis |
| Actions | Depress the hyoid bone |
| Identifiers | |
| Latin | Musculi infrahyoidei |
| Dorlands /Elsevier |
m_22/12549354 |
| TA | A04.2.04.001 |
| FMA | 71298 |
| Anatomical terms of muscle
[edit on Wikidata]
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The infrahyoid muscles (strap muscles) are a group of four pairs of muscles in the anterior (frontal) part of the neck. The four infrahyoid muscles are: the sternohyoid, sternothyroid, thyrohyoid and omohyoid muscles.
The infrahyoid muscles either originate from or insert on to the hyoid bone.
The term infrahyoid refers to the region below the hyoid bone, while the term strap muscles refers to the long and flat muscle shapes which resembles a strap. The stylopharyngeus muscle is considered by many to be one of the strap muscles, but is not an infrahyoid muscle.
The origin, insertion and innervation of the individual muscles:[1]
| Muscle | Origin | Insertion | Innervation |
| Sternohyoid | Posterior surface of manubrium sterni, adjoining parts of clavicle and the posterior sternoclavicular ligament | Medial part of lower border of hyoid bone | Ansa cervicalis |
| Sternothyroid | Posterior surface of manubrium sterni and adjoining part of first costal cartilage | Oblique line of thyroid cartilage | Ansa cervicalis |
| Thyrohyoid | Oblique line of the thyroid cartilage | Lower border of the body and the greater cornu of the hyoid bone | Cervical spinal nerve 1 via the hypoglossal nerve |
| Omohyoid (superior belly) | Intermediate tendon | Hyoid bone | Superior root of ansa cervicalis (C1) |
| Omohyoid (inferior belly) | Superior border of scapula | Intermediate tendon | Ansa cervicalis (C1-C3) |
All of the infrahyoid muscles are innervated by the ansa cervicalis from the cervical plexus (C1-C3) except the thyrohyoid muscle, which is innervated by fibers only from the first cervical spinal nerve travelling with the hypoglossal nerve.
The infrahyoid muscles function to depress the hyoid bone and larynx during swallowing and speech.
Muscles of the neck
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| Cervical |
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| Suboccipital |
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| Suprahyoid |
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| Infrahyoid |
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| Pharynx |
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| Larynx |
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| Trachea |
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| Fasciae |
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| リンク元 | 「舌骨下筋」 |
| 筋名 | 起始 | 停止 | 支配神経 | 機能 |
| 胸骨舌骨筋 | 胸骨(第一肋軟骨) | 舌骨(舌骨体) | 上位頚神経 | (頚神経ワナ) |
| 胸骨甲状筋 | 胸骨(胸骨柄後面、第一,二肋軟骨) | 甲状軟骨(斜線) | 喉頭を下方に引く | |
| 甲状舌骨筋 | 甲状軟骨(斜線) | 舌骨(舌骨体) | 舌骨を喉頭に近づける | |
| 肩甲舌骨筋 | 肩甲骨(肩甲骨上縁) | 舌骨(舌骨体) | 舌骨を押し上げる |