Lateral vs. Longitudinal Directions Explained
Body-Axis Orientation in Anatomy and Movement
These terms describe orientations relative to the body's long axis (head-to-toe line).
Lateral Direction
- Orientation: Perpendicular to the long axis.
- Synonyms: Side-to-side, mediolateral.
- Examples: Raising arms sideways, stepping left/right, lateral flexion of the spine.
Longitudinal Direction
- Orientation: Parallel to the long axis.
- Synonyms: Up-and-down, craniocaudal, cephalocaudal.
- Examples: Jumping, reaching overhead, spinal extension/flexion.
Quick Comparison
| Feature | Lateral | Longitudinal |
|---|
| Axis Relation | Perpendicular | Parallel |
| Common Name | Side-to-side | Up-and-down |
| Movement Example | Side step | Vertical jump |
Understanding these planes is essential in biomechanics, physical therapy, and sports science.
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