Neck Muscles

Sternocleidomastoid – Functional Anatomy

Sternocleidomastoid Anatomy. The sternocleidomastoid is a two-headed muscle that extends obliquely along the lateral neck. Origin: The sternal head attaches to the superior aspect of the manubrium. The clavicular head attaches to the medial third of the clavicle. Insertion: Both heads merge and attach to the mastoid process of the temporal bone and lateral third …

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Splenius Cervicis – Functional Anatomy

Splenius Cervicis Anatomy: – This is a broad, flat muscle that wraps around the lateral neck. It anchors in the upper thoracic vertebrae and inserts on the upper cervical vertebrae. This makes it a “jack of all trades, master of none,” as it assists in extension, rotation, side-bending, and strapping things down. Origin – spinous …

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Splenius Capitis – Functional Anatomy

Splenius capitis anatomy. This muscle is a broad, flat sheet that originates along the mid-line of the base of the neck. It wraps the lateral muscles and inserts on the lateral base of the skull. Origin – midline fascia over the ligamentum nuchae from C3 – C7 and the spinous processes of T1-T3 Insertion – …

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Scalene Muscles – Functional Anatomy

Scalenes are 3 (sometimes 4) muscles on either side of the neck. The three bellies are named for their position; scalenus anterior, scalenus medius, scalenus posterior. The anomalous belly is called scalenus minimus.They are lateral cervical muscles that connect the cervical vertebrae to the upper thoracic cage. They are long muscles with fibers of uneven …

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Semispinalis Capitis – Functional Anatomy

The Functional anatomy of semispinalis capitis is significant when it comes to upper cervical pain. It attaches to the occiput and then usually skips the first three cervical vertebrae. After that, it has variable attachments to the vertebrae from C4 through T7. Greater Occipital Nerve Involvement The greater occipital nerve is structurally vulnerable to the …

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