Elucidating how body parts in their earliest recognizable form are assembled in tetrapods during development is essential for understanding the nature of morphological evolution. Researchers found in ...

The spine (aka backbone) is a linked column of bones running from the head down to the lower back. Bone segments form the column. One bone segment is a vertebra, and multiple bone segments are ...

Sacral fractures occur in approximately 45% of pelvic fractures. An associated neurologic injury of the lumbosacral plexus may occur in 25% of sacral fractures. 1 Sacral fractures typically result ...

1. A comparative study was made of the morphological changes occurring in the osteology of the limbs and girdles of the degenerate, snake-like lizards. For purposes of comparison a morphological ...

Researchers have uncovered a new species of 'sail-backed' dinosaur which roamed Earth 125 million years ago. Found in Spain, the Styracosterna dinosaur had tall neural spines on its vertebrae. Among ...

Nagoya, Japan - In the evolution of tetrapods, the position of the hindlimb has diversified along with the vertebral formula, which is the number of small bones forming the vertebra. Tetrapods, as the ...