Levatores costarum muscles

The levatores costarum muscles (Latin for "elevators of the ribs") are a group of small muscles located in the thoracic region of the human body. These muscles play a role in the respiratory system by assisting in the elevation of the ribs during inhalation.

Anatomy

The levatores costarum muscles originate from the transverse processes of the seventh cervical vertebra (C7) and the first eleven thoracic vertebrae (T1-T11). They insert into the outer surface of the rib immediately below the vertebra from which they originate.

Innervation

The levatores costarum muscles are innervated by the dorsal rami of the spinal nerves from C8 to T11. These nerves provide the necessary motor signals for muscle contraction.

Blood Supply

The blood supply to the levatores costarum muscles is provided by the intercostal arteries, which run along the ribs and supply blood to the intercostal spaces and surrounding muscles.

Function

The primary function of the levatores costarum muscles is to elevate the ribs, which increases the volume of the thoracic cavity and aids in inhalation. By elevating the ribs, these muscles help to expand the lungs and facilitate the intake of air.

Clinical Significance

Dysfunction or injury to the levatores costarum muscles can result in impaired respiratory function and may contribute to conditions such as respiratory distress or chronic pain in the thoracic region. Proper functioning of these muscles is essential for effective breathing and overall respiratory health.

See Also

• Respiratory system
• Intercostal muscles
• Thoracic diaphragm
• Spinal nerves