Lateral Lumbar Interbody Fusion (LlLF), Anatomical View

Description

Viewed from a lateral anatomical perspective, the animation tracks the lumbar vertebral bodies (typically L2 to L5) with the intervertebral discs between adjacent endplates and the vertebral canal positioned posteriorly. As the sequence advances, the lateral transpsoas corridor is implied by the relationship of the psoas major to the anterolateral disc space, leading to placement of an interbody cage (spacer) centrally within the disc space. Disc height is restored as the device seats on the apophyseal ring, and segmental alignment changes are shown relative to the anterior longitudinal ligament anteriorly and the facet joints posteriorly. Lateral lumbar interbody fusion (LLIF) is commonly selected to address degenerative disc disease, low-grade spondylolisthesis, recurrent foraminal stenosis, and coronal deformity where indirect decompression is desired without a posterior canal exposure. The animated progression clarifies steps that static figures struggle to communicate: disc space distraction, cage trajectory from lateral to medial under fluoroscopic logic, and the way restoring disc height tensions the annulus and can enlarge the neural foramina to offload the exiting nerve root. One wrong millimeter matters. Practical uses include resident teaching for lateral approach planning, device-company training modules explaining cage positioning and endplate engagement, and publisher content for spine surgery chapters discussing indirect decompression and alignment restoration. It also supports patient-facing education when counseling about approach-specific risks such as psoas morbidity and lumbar plexus irritation during the transpsoas passage. Anatomical accuracy verified by SciePro's Medical Advisory Board.