Interspinales - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The interspinales are a set of deep muscles of the back. They are generally considered absent from the thoracic region. Attachments: Originate from the spinous process of cervical and lumbar vertebrae. The fibres ascend and insert onto the spinous processes of the vertebrae above. Actions: Contributes to extension and rotation of the vertebral column. Also stabilises the vertebrae. Innervation: Posterior rami of the spinal nerves. Blood Supply: Cervical region – vertebral, deep cervical, occipital, and transverse cervical arteries . Lumbar region – lumbar arteries. Adobe Stock, Licensed to TeachMeSeries Ltd Fig 1The lumbar interspinales muscles. The cervical group has a similar arrangement. Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Frequent questions What are the interspinales muscles? The interspinales muscles are deep back muscles that primarily assist in the extension and rotation of the vertebral column. They are located between the spinous processes of cervical and lumbar vertebrae. Where do the interspinales muscles attach? The interspinales originate from the spinous processes of cervical and lumbar vertebrae and insert onto the spinous processes of the vertebrae directly above them. This arrangement allows them to effectively stabilize the spine. What is the function of the interspinales muscles? The interspinales muscles contribute to the extension and rotation of the vertebral column while also providing stability to the vertebrae. Their role is essential for maintaining proper posture and spinal alignment. How are the interspinales muscles innervated? The interspinales muscles are innervated by the posterior rami of the spinal nerves. This innervation allows for coordinated movement and stability of the vertebral column. What is the blood supply to the interspinales muscles? In the cervical region, the interspinales receive blood from the vertebral, deep cervical, occipital, and transverse cervical arteries, while in the lumbar region, they are supplied by the lumbar arteries. This vascular supply is crucial for their function and health. Rate This Article