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Neck and Vertebrae
Names, Origins, Insertions, and Actions of neck and vertebral muscles
| Question | Answer |
|---|---|
| thin muscle over front of the neck; tenses skin of neck | platysma |
| consists of the mylohyoid, stylohyoid, and digastric; together they elevate the hyoid bone | suprahyoid muscles |
| consists of the the omohyoid and sternohyoid; together they depress the hyoid bone | infrahyoid muscles |
| attaches the hyoid bone to the scapula | omohyoid |
| Origin: sternum and clavicle Insertion: mastoid bone Action:(bilaterally) flexes the neck, (unilaterally) flexes neck laterally on same side, rotates neck on opposite side | sternocleidomastoid |
| located under the sternocleidomastoid; attaches cervical region of spine to ribcage | scalene muscles |
| located under the sternocleidomastoid;(bilaterally) neck flexion (unilaterally) lateral neck flexion and rotation | scalene muscles |
| Origin: ligamentum nuchae Insertion: occipital bone and mastoid process of temporal Action: (bilaterally) head/neck extension, (unilaterally) neck rotation with side bending | splenius capitis |
| a group of 3 muscles; together extend the neck and vertebral column, maintain upright posture | erector spinae muscles |
| 5 muscles running along the vertebral column; together extend the vertebral column | transversospinalis muscles |
| connects the ribcage and spinal column to pelvis; (bilaterally) extends the spinal column, (unilaterally) flexes the spinal column laterally | quadratus lumborum |
| ligament attaching the occipital bone to the spinous processes of the vertebrae | ligamentum nuchae |