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Sagittal Balance
The alignment of the spine in the side-view plane, crucial for proper spinal biomechanics.
Full Definition
Sagittal balance refers to the proper alignment of the spine when viewed from the side, encompassing the natural curves of the cervical lordosis, thoracic kyphosis, and lumbar lordosis. Optimal sagittal balance positions the head over the pelvis with minimal energy expenditure for maintaining upright posture. Sagittal imbalance, characterized by positive sagittal vertical axis measurements, can result from degenerative changes, surgical procedures, or congenital conditions, often requiring complex spinal reconstruction to restore proper alignment.
Usage
Usage note: Often abbreviated as SVA (sagittal vertical axis) in measurements.
In Context
- "Restoration of sagittal balance was the primary goal of the multilevel fusion." — surgical plan
- "The patient's sagittal balance improved significantly following pedicle subtraction osteotomy." — post-operative assessment
Also known as
spinal sagittal alignment
sagittal plane balance
Contrasted with
sagittal imbalance
positive sagittal alignment
Don't confuse with
coronal balance
spinal deformity