Concept explainers
Match each numbered item with the most closely related lettered item.
spinalis.................................................
To review:
Match the term spinalis with the most closely related description given below:
Compresses cheeks
Elevates larynx
Tenses skin of neck
Pelvic floor/ associated structures
Elevates mandible
Move ribs
Retracts tongue
Extends neck
Eye muscles
Makes eye look down
Introduction:
Spinalis is a portion of erector spinae, it is a group of muscles present in the intermediate layer of the back muscles. There are two muscles in this group, namely spinalis cervicis and spinalis thoracis.
Explanation of Solution
Spinalis muscles are linked to the vertebral column’s spinous processes. Of these two, spinalis cervicis originates from the cervical C7 to T2 spinous process and inserts at spinous processes of the axis and the cervical C3-C4. The primary action of this muscle is to extend the neck.
Therefore, it can be concluded that the term spinalis can be correctly matched with option (h) extends neck.
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Chapter 10 Solutions
Pearson Etext Human Anatomy -- Access Card (9th Edition)
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