Equine vs Canine vs Human Spine
🦴 Look at this interesting comparison between the equine, canine, and human spine. Particularly the difference in the shape of the lumbar spinous processes.

The lumbar spinous processes stick out from the side of the lumbar vertebrae and provide attachment points for the back muscles.

🐴 In the horse, the transverse processes are huge horizontally, but are spaced very close together. This shows an evolutionary adaptation for load carrying.

🐶 In the canine, the transverse processes are long, but more spaced out. This shows an adaptation for mobility while still carrying body weight perpendicular to gravity.

🧒 In humans, the lumber transfers processes are short, with just enough space to provide attachment points for relatively small lumbar stabilizers. This is because the vertebral bodies and intravertebral discs assume the majority of the load during responsibility given that the spine is parallel to gravity.

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