Obliquus Capitis Inferior - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The obliquus capitis inferior is a suboccipital muscle of the neck. It is the only muscle within the suboccipital group which has no attachment to the cranium. Attachments: Originates from the spinous process of the C2 vertebra and attaches onto the transverse process of C1. Actions: Extension and rotation of the head. Innervation: Suboccipital nerve (posterior ramus of C1) Blood supply: Vertebral artery and deep descending branches of the occipital artery By TeachMeSeries Ltd (2026) Fig 1The left occipital muscles, which lie underneath the deep muscles of the back. 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 Pro Feature - Dissection Atlas Dissection of the suboccipital muscles of the neck Dissection of the suboccipital muscles of the neck You've Discovered a Pro Feature Access our Dissection Image Library Enhance your understanding with high-resolution dissection images showcasing real-life anatomy. Learn More Frequent questions What is the obliquus capitis inferior? The obliquus capitis inferior is a suboccipital muscle located in the neck, notable for being the only muscle in its group that does not attach to the skull. It plays a role in the movement and stability of the head. What are the attachments of the obliquus capitis inferior? This muscle originates from the spinous process of the C2 vertebra and inserts onto the transverse process of the C1 vertebra. Its unique attachment points contribute to its specific functions in head movement. What actions does the obliquus capitis inferior perform? The primary actions of the obliquus capitis inferior include the extension and rotation of the head. These movements are essential for various head positions and orientations. What is the innervation of the obliquus capitis inferior? The obliquus capitis inferior is innervated by the suboccipital nerve, which is the posterior ramus of the C1 spinal nerve. This nerve supply is crucial for the muscle's function and coordination. What is the blood supply to the obliquus capitis inferior? The blood supply for the obliquus capitis inferior comes from the vertebral artery and the deep descending branches of the occipital artery. Adequate blood flow is vital for the muscle's health and performance. Rate This Article