Serratus Posterior Superior (Noun)
Meaning
A thin quadrilateral muscle of the upper and dorsal part of the thorax; acts to elevate the upper ribs.
Classification
Nouns denoting body parts.
Examples
- The serratus posterior superior muscle originates from the lower part of the nuchal ligament, the spinous process of the lowest cervical vertebra, and the three upper thoracic vertebrae.
- This muscle works synergistically with the trapezius to help rotate the scapula, while the serratus posterior superior acts to elevate the upper ribs.
- A detailed dissection revealed the unique relationship between the serratus posterior superior and the muscles of the back, specifically the trapezius and rhomboids.
- Serratus posterior superior muscles help stabilize and expand the thoracic cavity by lifting the upper ribs, increasing the lung volume.
- Serratus posterior superior originates on the lower cervical and upper thoracic spinous processes, allowing for muscle action to raise the upper rib cage during inhalation.