L1 (1st Lumbar Vertebra)
Anatomy Terms
- Annulus Fibrosus
- Anterior Longitudinal Ligament
- Aorta
- Arachnoid Mater
- C1 (Atlas) - 1st Cervical Vertebra
- C2 (Axis) - 2nd Cervical Vertebra
- C3 (3rd Cervical Vertebra)
- C4 (4th Cervical Vertebra)
- C5 (5th Cervical Vertebra)
- C6 (6th Cervical Vertebra)
- C7 (7th Cervical Vertebra)
- Coccyx
- Costal Cartilage
- Dorsal Root of Spinal Nerve
- Dura Mater
- False Ribs
- Fat in Epidural Space
- Femur
- Iliolumbar Ligament
- Inferior Articular Process
- Intertransverse Ligaments
- Intervertebral Discs
- L1 (1st Lumbar Vertebra)
- L2 (2nd Lumbar Vertebra)
- L3 (3rd Lumbar Vertebra)
- L4 (4th Lumbar Vertebra)
- L5 (5th Lumbar Vertebra)
- Nucleus Pulposus
- Pelvis
- Pia Mater
- Posterior Sacroiliac Ligament
- Pubic Symphysis
- Radiate Ligaments
- Sacroiliac Joint
- Sacrospinous Ligament
- Sacrotuberous Ligament
- Sacrum
- Spinal Ganglion
- Spinous Process
- Subarachnoid Space
- Superior Articular Process
- Supraspinous Ligament
- T10 (10th Thoracic Vertebra)
- T11 (11th Thoracic Vertebra)
- T12 (12th Thoracic Vertebra)
- T2 (2nd Thoracic Vertebra)
- T3 (3rd Thoracic Vertebra)
- T4 (4th Thoracic Vertebra)
- T5 (5th Thoracic Vertebra)
- T6 (6th Thoracic Vertebra)
- T7 (7th Thoracic Vertebra)
- T8 (8th Thoracic Vertebra)
- T9 (9th Thoracic Vertebra)
- Transverse Process
- True Ribs
- Ventral Ramus (Intercostal Nerve)
- Ventral Root of Spinal Nerve
- Vertebral Body
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Full L1 (1st Lumbar Vertebra) Description
[Continued from above] . . . of the lumbar region of the spine. A concave articular surface on the superior side of the cylindrical centrum matches the convex inferior section of the T12. Intervertebral discs made of cartilaginous connective tissue cushion the joints above and below to protect and support the spinal column. The vertebral arch includes strong, short, and wide laminae; substantial pedicles; long, thin transverse processes; and a fairly rectangular spinous process that extends almost horizontally from the body of the L1 vertebra. An articular process emanates from the vertebral arch between the pedicle and transverse process on each side, with a superior process and facet articulating with the T12 vertebra and an inferior process and facet articulating with the L2. Within the vertebral arch, the vertebral foramen is triangular and larger than in the thoracic vertebrae (though smaller than in the cervical spine). Like the other lumbar vertebrae, the L1 vertebra is noteworthy for the lack of transverse foramina in the transverse processes, and also by the lack of facets to either side of the centrum.