What is levatores costarum?
The levatores costarum (or levator costae) muscles are paired muscles of the posterior thorax. They number twelve on each side and attach to the transverse processes of C7 to T11 vertebrae and the ribs below, helping to elevate the ribs during respiration.
What innervates the levatores costarum?
levatores costarum are innervated by branches of the lateral branch of the ramus dorsalis of the respective thoracic nerve. An additional branch of the r. muscularis proximalis of the intercostal nerves 1-3 innervates the lateral part of the levator muscles of the second to the fourth rib.
How many pairs of levator costarum?
12 pairs
The levatores costarum (Latin: musculi levatores costarum) are a group of 12 pairs of muscles located in the posterior thorax. They are located on each side of the vertebral column and stretch between transverse processes of vertebrae and ribs found one level below.
What does the term Costarum refer to?
: a series of 12 muscles on each side that arise from the transverse processes of the seventh cervical and upper 11 thoracic vertebrae, that pass obliquely downward and laterally to insert into the outer surface of the rib immediately below or in the case of the lowest four muscles of the series divide into two …
What is the function of the Levatores Costarum brevis?
| Levatores costarum muscles | |
|---|---|
| Origin | Transverse processes of C7 to T11 vertebrae |
| Insertion | Superior surfaces of the ribs immediately inferior to the preceding vertebrae |
| Nerve | dorsal rami C8-T11 (Intercostal nerves) |
| Actions | Assists in elevation of the thoracic rib cage |
Which intercostal muscle is deepest?
innermost intercostal muscles
The innermost intercostal muscles are muscles of respiration. They are the deepest intercostal muscles located in the intercostal spaces, and contract along with the internal intercostal muscles to reduce the transverse dimension of the thoracic cavity during expiration.
What is the serratus posterior superior?
The serratus posterior superior muscle is a thin, quadrilateral muscle of the posterior thorax. It extends from the vertebrae to the ribs and aids in deep inspiration.
What is serratus posterior inferior?
The serratus posterior inferior muscle is a thin, quadrilateral muscle of the posterior thorax. It extends from the vertebrae to the ribs and aids in deep inspiration.
What Innervates the serratus posterior inferior?
The serratus posterior inferior originates on the supraspinal ligament, and the spinous processes of the upper two to three lumbar vertebrae (L01–L03) and the lower two thoracic vertebrae (T11–T12). It inserts on the lower borders of ribs 9–12, and is innervated by intercostal nerves 9–12.
What is the origin and insertion of the internal intercostals?
The internal intercostal muscles originate from the costal groove of the rib and insert into the superior aspect of the rib below in a direction perpendicular to the external intercostal muscles. It is this arrangement that allows these muscles to facilitate exhalation.
What is the origin of innermost intercostal muscle?
| Innermost intercostal muscle | |
|---|---|
| Origin | Infero-posterior border of each rib (above) |
| Insertion | Supero-posterior border of the rib (below) |
| Artery | intercostal arteries |
| Nerve | intercostal nerves |
What is the origin insertion and action of the serratus anterior?
Anatomical terms of muscle The serratus anterior is a muscle that originates on the surface of the 1st to 8th ribs at the side of the chest and inserts along the entire anterior length of the medial border of the scapula. The serratus anterior acts to pull the scapula forward around the thorax.
Where does the Levatores costarum muscle originate from?
The levatores costarum arise from transverse processes of the seventh cervical to eleventh thoracic vertebrae (C7 – T11). Each muscle originates from one transverse process and passes obliquely downward. Each muscle inserts into the superior border or external surface of a rib one level below its origin.
Where are the levatores located in the thorax?
The levatores costarum (Latin: musculi levatores costarum) are a group of 12 pairs of muscles located in the posterior thorax. They are located on each side of the vertebral column and stretch between transverse processes of vertebrae and ribs found one level below.
What to do if you have injured your Levatores costarum muscles?
If you believe you have injured your levatores costarum muscles, contact your doctor. He or she can order all of the appropriate imaging, medicine, and therapy to help you heal as quickly as possible.
Where does oxygenated blood enter the Levatores costarum?
The dorsal branch of the posterior intercostal artery brings oxygenated blood to the levatores costarum muscles. The posterior intercostal artery is a direct branch of the thoracic aorta and travels along the lower border of each rib.