- April 28, 2026The lumbar facet capsular ligaments at each level from L1-L2 through L5-S1 restrain the coupled rotation-lateral flexion movements and protect…
- April 28, 2026The lumbar ligamentum flavum is the thickest and most clinically significant portion of the flavum, forming the posterior spinal canal…
- April 28, 2026The lumbar vertebral bodies are the largest in the mobile spine, supporting the full weight of the trunk, head, and…
- April 28, 2026The psoas major is the primary hip flexor for everyday activities such as walking and stair climbing, arising from the…
- April 28, 2026The serratus posterior inferior counteracts the tendency of the diaphragm to pull the lower ribs inward and upward during forceful…
- April 28, 2026The psoas minor is a vestigial muscle present in only approximately 60 percent of people, a small spindle-shaped muscle anterior…
- April 28, 2026The iliocostalis lumborum is the lumbar portion of the iliocostalis, forming the most lateral column of the erector spinae in…
- April 28, 2026The quadratus lumborum is a rectangular muscle filling the space between the iliac crest and the 12th rib on each…
- April 28, 2026The erector spinae is not a single muscle but a column of three parallel muscle groups, iliocostalis, longissimus, and spinalis,…