The interspinales insert on which structure?

The interspinales insert on which structure?

• A. Unite on consecutive spinous processes of vertebrae
• B. Unite on consecutive transverse processes of vertebrae
• C. Spinous process of the same vertebra
• D. Inferior articular process

Answer: (A)

Interspinales are small muscles that bridge between adjacent spinous processes. They originate from the spinous process of one vertebra and insert on the spinous process of the vertebra immediately above it, so they unite consecutive spinous processes. This placement supports spine extension and stability. The other options describe attachments to transverse processes (intertransversarii), the spinous process of the same vertebra (not a bridging insertion), or structures of the facet joint (inferior articular process), which are not the insertions of the interspinales.

Interspinales are small muscles that bridge between adjacent spinous processes. They originate from the spinous process of one vertebra and insert on the spinous process of the vertebra immediately above it, so they unite consecutive spinous processes. This placement supports spine extension and stability. The other options describe attachments to transverse processes (intertransversarii), the spinous process of the same vertebra (not a bridging insertion), or structures of the facet joint (inferior articular process), which are not the insertions of the interspinales.