The serratus posterior muscles are two paired muscles located in the upper and lower back. They include: The serratus posterior superior muscle The serratus posterior inferior muscle Together, these muscles comprise the intermediate layer of the extrinsic musculature of the back . The serratus posterior superior muscle arises by an aponeurosis from the lower part of the nuchal ligament, from the spinous processes of C7, T1, T2, and sometimes T3, and from the supraspinal ligament. [2] It is inserted, by four fleshy digitations into the upper borders of the second, third, fourth, and fifth ribs past the angle of the rib. [2]
Serratus Posterior Superior Actions Attachments TeachMeAnatomy
Serratus posterior superior: elevate the ribs during inspiration (accessory muscle of inspiration) and has a stabilization role for thorax. Serratus posterior inferior: depress the ribs during expiration (accessory muscle of expiration) Bilateral action of posterior superior/posterior inferior reduce extension of thoracic vertebrae. The serratus posterior superior is a muscle within the intermediate compartment of the back. It is a thin and rectangular in shape, and lies deep to the rhomboid muscles in the upper back. Attachments: Originates from the lower part of the ligamentum nuchae, and the cervical and thoracic spines (usually C7 - T3). Intermediate extrinsic muscles of the back: serratus posterior superior and serratus posterior inferior muscles. All the extrinsic back muscles are innervated by the anterior (ventral) rami of the cervical spinal nerves, except for the trapezius muscle which receives its supply from the accessory nerve (CN XI). Superficial layer Trapezius muscle In this video, we explore the anatomy of the serratus posterior superior muscle - a superficial muscle of the back. Want to test your knowledge on ALL of the.
Serratus Posterior Muscles Origin, Insertion, Nerve Supply & Action » How To Relief
The serratus posterior superior muscle originates from the: - inferior end of the nuchal ligament; - spinous processes of the seventh cervical and first to third thoracic vertebrae; - adjacent supraspinous ligaments. The serratus posterior superior attaches to ribs 2 through 5 and elevates them during inspiration whereas the serratus posterior inferior attaches the vertebrae to ribs 8 through 12 and depresses them during forced expiration. These muscles, in conjunction with the muscles of the thoracic wall, help alter the thoracic volume during respiration. Definition. The Serratus posterior superior ( Serratus posticus superior) is a thin, quadrilateral muscle, situated at the upper and back part of the thorax. It arises by a thin and broad aponeurosis from the lower part of the ligamentum nuchae, from the spinous processes of the seventh cervical and upper two or three thoracic vertebrae and. The serratus posterior superior originates on the supraspinal ligament, the ligamentum nuchae, the spinous processes of the upper two to three thoracic vertebrae (T01-T03), as well as the seventh cervical vertebra. It inserts on the upper borders of ribs 2-5, and is innervated by intercostal nerves 2-5.
The Serratus Posterior Superior Stock Illustration Illustration of bones, science 141758645
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. Summary origin: ligamentum nuchae, spinous processes of C7-T3 and supraspinous ligament insertion: superior border of 2 nd to 5 th ribs innervation: 2 nd to 5 th intercostal nerves Intermediate Posterior Muscles. The intermediate muscles of the posterior contribute to movements of the ribcage during respiration. Serratus Posterior Superior - The serratus posterior superior is a thin, rectangular-shaped muscle lying below the rhomboid muscles.. Attachments: Originates from the lower spine and attaches to ribs 2 through 5.
The serratus posterior superior is a thin rectangular-shaped muscle located in the upper back between the cervical and thoracic regions of the spine.It lies deep to the rhomboid muscles and extends between the vertebrae and ribs.The serratus posterior superior is smaller than the inferiorly located serratus posterior inferior. The serratus posterior superior (Latin: musculus serratus posterior superior) is a broad rectangular-shaped muscle of the back that is located in the upper back between the cervical and thoracic regions. It lies deep to the rhomboid muscles. The serratus posterior superior extends between the vertebrae of the spine and ribs of the thorax.
Serratus posterior superior muscle, illustration Stock Image F029/7086 Science Photo Library
The serratus posterior superior and inferior muscles are generally considered clinically insignificant muscles that, based on attachments, probably function in respiration. Interestingly, however, there is no evidence supporting a respiratory role for these muscles. In fact, some electromyographic data refute a respiratory function for these. Want to brush up on your knowledge of the serratus posterior muscles? This is the video you've been looking for! Master this topic in minutes. Once you're do.
