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 …
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 …
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 – …
This post covers the anatomy of the suboccipital muscles, including the anterior suboccipital muscles. which are often described separately. The suboccipital muscles attach the atlas and axis to the bottom of the occiput. They secure the head on the atlas and fine-tune movement of the cranium on the atlas and axis. The posterior suboccipital muscles …
Then anatomy of thoracic outlet structures is complex in several ways. Many bones are both origin and insertion for muscles in this complex. Secondly, several of the muscles have statistically significant variations in cadaver studies. This post starts with a brief overview, then, a video that walks through the structures from front to back. After …
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 …
Attachments 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. Variations in Attachments Dissection studies vary in their report of attachments on …
