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MOINA of the Neck
Origin, Insertion, Nerve supply, Action of muscles of the Neck
| Question | Answer |
|---|---|
| What muscle originates at the deep fascia over pectoralis major and deltoids? | Platysma |
| Inserted at the body of mandible and angle of the mouth | Platysma |
| Innervated by the facial nerve cervical branch (CN VII) | Platysma |
| Depresses the mandible and angle of the mouth | Platysma |
| Muscle that originates at manubrium sterni and medial 3rd of the clavicle | Sternocleidomastoid |
| What muscle is inserted at the mastoid process of the temporal bone and occipital bone? | Sternocleidomastoid |
| Innervated by the spinal part of accessory nerve and C2, C3 (CN XI) | Sternocleidomastoid |
| Two muscles acting together to extend the head and flex the neck; one muscle rotates the head to the opposite side | Sternocleidomastoid |
| What muscle originated at the body of mandible? | Anterior belly of digastric muscle |
| Innervated by the nerve to mylohyoid | Anterior belly of digastric muscle |
| What muscle originates at mastoid process of temporal bone | Posterior belly of digastric muscle |
| Inserted at intermediate tendon (held to hyoid bone by fascial sling) | Digastric |
| Depresses the mandible/ elevates hyoid bone | Digastric |
| What muscle is originated at styloid process | Stylohyoid |
| Muscle(s) innervated by facial nerve (CN VII) | Stylohyoid and Posterior belly of digastric muscle |
| What muscle elevates the hyoid bone? | Stylohyoid |
| Originated at mylohyoid line of body of mandible | Mylohyoid |
| Inserted at the body of hyoid bone and fibrous raphe | Mylohyoid |
| Innervated by the inferior alveolar nerve | Mylohyoid |
| It elevates floor of the mouth and hyoid bone/ depresses the mandible | Mylohyoid |
| Originated at inferior mental spine of mandible | Geniohyoid |
| What muscle elevates the hyoid bone/ depresses mandible | Geniohyoid |
| Muscle originated at manubrium sterni and clavicle | Sternohyoid |
| Depresses the hyoid bone | Sternohyoid |
| Muscle(s) inserted at the body of hyoid bone | Stylohyoid, Geniohyoid, Sternohyoid, and Mylohyoid |
| Originated at Manubrium sterni | Sternothyroid |
| Inserted at oblique line on lamina of thyroid cartilage | Sternothyroid |
| Depresses the larynx | Sternothyroid |
| Originated at oblique line on lamina of thyroid cartilage | Thyrohyoid |
| Inserted at lower border of hyoid bone | Thyrohyoid |
| Depresses hyoid bone/ elevates the larynx | Thyrohyoid |
| Muscle(s) innervated by the first cervical nerve | Geniohyoid and Throhyoid |
| Originates at upper margin of scapula and suprascapular ligament | Inferior belly of Omohyoid |
| What muscle originated at lower border of body of hyoid bone | Superior belly of Omohyoid |
| Inserted at intermediate tendon (held to clavicle and 1st rib by fascial sling) | Omohyoid |
| It depresses the hyoid bone | Omohyoid |
| Muscle(s) innervated by the ansa cervicals; C1, C2, C3 | Sternohyoid, Sternothyroid, and Omohyoid |
| Originated at transverse processes of 3rd, 4th, 5th, and 6th cervical vertebrae | Scalenus anterior |
| Innervated by C4, C5, and C6 | Scalenus anterior |
| Originated at transverse processes of upper 6 cervical vertebrae | Scalenus medius |
| Muscle(s) inserted at first rib | Scalenus anterior and Scalenus medius |
| What muscle(s) elevates 1st rib; laterally flexes and rotates cervical part of the vertebral column? | Scalenus anterior and Scalenus medius |
| Originated at transverse process of lower cervical vertebrae | Scalenus posterior |
| Inserted at second rib | Scalenus posterior |
| It elevates second rib; laterally flexes and rotates cervical part of the vertebral column | Scalenus posterior |
| Innervated by the anterior rami of cervical nerves | Scalenus medius and Scalenus posterior |
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