5.1 Anatomy of the Muscular System: Intro Part 4 Flashcards
What is the action of the longissimus cervicis?
bilateral extend head
unilateral flexes neck to the same side
What is the innervation of the longissimus cervicis?
cervical and thoracic spinal nerves
What is the origin and insertion of the longissimus thoracis?
origin = transverse process of all thoracic and lumbar vertebrae
insertion = transverse process of all thoracic vertebra
What is the action of the longissimus thoracis?
bilateral extension of spine
unilateral lateral flexion of spine
What is the innervation of the longissimus thoracis?
thoracic and lumbar spinal nerves
What is the origin and insertion of the thyrohoid?
origin = thyroid cartilage of larynx
insertion = hyoid bone
What is the action of the thyrohoid?
elevates thyroid, depresses hyoid bone
What is the innervation of the thyrohoid?
hypoglossal nerve
What is the origin and insertion of the scalenes?
origin = transverse process of C2-C7
insertion = first and second ribs
What is the action of the scalenes?
elevates ribs 1 and 2
What is the innervation of the scalenes?
cervical spinal nerves
What are erector spinae group?
superficial muscles in the back that act as prime extensors of the vertebral column
What is flexion of the spine?
forward bending of the trunk (cat stretch)
What is extension of the spine?
backward bending
What are the muscles of the vertebral column?
spinalis
longissimus
iliocostalis
