Atlas (C1) vs Humerus
| Property | Atlas (C1) | Humerus |
|---|---|---|
| Latin Name | Atlas | Os humeri |
| Type | Bone | Bone |
| Body System | Skeletal | Skeletal |
| Body Region | Spine | Upper Arm |
| Function | The first cervical vertebra that supports the skull. Allows nodding movements (flexion and extension) of the head at the atlanto-occipital joint. | The bone of the upper arm connecting the shoulder to the elbow. Provides attachment points for muscles of the shoulder and arm, enabling a wide range of upper limb movements. |
| Clinical Significance | Jefferson fractures (burst fractures of the atlas) result from axial loading. Atlanto-occipital dislocation is usually fatal. Congenital anomalies include atlas assimilation (occipitalization). | Surgical neck fractures are common in elderly patients. Midshaft fractures may damage the radial nerve causing wrist drop. Supracondylar fractures are the most common elbow fractures in children. |
| FMA ID | 12519 | 13303 |
Full structure pages
Atlas (C1)
Atlas
Ring-shaped and unusual in lacking both a vertebral body and a spinous process, the atlas is the first cervical vertebra and supports the skull. Its structure consists of anterior and posterior arches joined by two …