What does the levator Costarum muscles do?
What does the levator Costarum muscles do?
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 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 action of the levator Costarum?
Levatores costarum functions in elevating the ribs, and produces rotation and lateral flexion of the thoracic vertebrae.
What is the serratus posterior superior?
The serratus posterior superior is located at the upper back and part of the thorax, deep to the rhomboid muscles. This muscle works to elevate the 2nd-5th ribs, which aids in deep inspiration (inhalation).
What is the levator scapulae?
The levator scapulae muscle connects to the transverse processes of the top four cervical vertebrae (C1 to C4) and runs down the side of the neck where it eventually connects with the scapula (shoulder blade).
What nerve innervates the serratus posterior?
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 nerve innervates the serratus posterior superior muscle?
Serratus posterior superior innervated by ventral rami of intercoastal nerves of T1-T5. Serratus posterior inferior innervated by ventral rami of intercoastal nerves of T9-T12.
What nerve Innervates the subcostal muscle?
Subcostal nerve (T12). The subcostal nerve provides sensory innervation to the region under the umbilicus and also provides motor innervation to the pyramidalis and quadratus lumborum muscles.
Where is subcostal?
The subcostal plane is a transverse plane which bisects the body at the level of the 10th costal margin and the vertebra body L3.
Which nerves supply the levator scapulae and scalene muscles?
The dorsal scapular nerve (C5) supplies the levator scapulae and rhomboid muscles; it aids in elevation and adduction of the scapula toward the spinal column.
What nerve innervates Levatores costarum?
Levatores costarum is innervated by the lateral branches of the dorsal rami of thoracic spinal nerves (T1 – T12).
Where is the Levatores costarum located?
Levatores costarum is lateral to the rotatores thoracis muscle group and medial to the external intercostal muscles. It is also located deep to semispinalis cervicis and thoracis muscles. Levatores costarum is innervated by the lateral branches of the dorsal rami of thoracic spinal nerves (T1 – T12).
What artery supplies blood to the Levatores costarum?
Blood supply The levatores costarum are supplied by the dorsal branches of the posterior intercostal arteries, which travel along the lower border of each rib and are direct branches of the thoracic aorta.
What is the difference between Levatores costarum longi and Longi?
These two bundles are called levatores costarum longi and levatores costarum breves, and both have a common origin site. The short (breves) fascicles insert into the ribs one level below their origin, while the long (longi) fascicle descends further and attaches to the rib located two levels below.
