[The "envelope" versus the biomechanical function of the spine]

Area of Science:

• Developmental biology
• Neuroscience
• Anatomy

Context:

• The development of the axial skeleton and nervous system is intricately linked.
• Previous research has highlighted the relationship between the brain and its surrounding skeletal structures.
• The unique developmental interplay between the spinal cord and vertebral column requires further elucidation.

Purpose:

• To advocate for a deeper understanding of the morphogenetic relationship between the developing spinal cord-nerve roots complex and the vertebral column.
• To emphasize the dual (transversal and longitudinal) envelopment of the neural elements by the skeletogenic case.
• To highlight the impact of differential growth rates between neural and vertebral components on anatomical feature development.

Summary:

• The developing spine exhibits an intimate morphogenetic relationship between the spinal cord-nerve roots complex and its skeletogenic envelope, mirroring the brain-skull connection.
• This neurovertebral relationship is characterized by the spinal cord-nerve roots complex being enveloped both transversely and longitudinally by its skeletal casing.
• Vertebral development, including features like vertebral body size and intervertebral foramina shape, is significantly influenced by the coordinated growth dynamics of the spinal cord-nerve roots complex and the vertebral column, complicated by the neural growth lagging behind vertebral growth.

Impact:

• Provides a foundational understanding for research into congenital spinal deformities.
• Informs clinical practices related to spinal development and potential malformations.
• Contributes to the broader field of developmental anatomy and neuro-osseous relationships.