Anatomy: Posterior Fossa, Hindbrain & Craniocervical Junction
Spinal cord
The spinal cord is the bundle of nerve tissue extending from the brainstem down the spine, which can be affected in Chiari malformation through syringomyelia.
In short: Spinal cord
- It carries signals between the brain and the body.
- It extends from the brainstem down through the spine.
- In Chiari, it can develop a fluid-filled cavity (syrinx).
- Effects on the cord cause sensory, motor, and other symptoms.
What it is
The spinal cord is the long bundle of nerve tissue that extends from the brainstem down through the spinal canal, carrying signals between the brain and the rest of the body. In Chiari malformation, the spinal cord can be affected — most notably by syringomyelia, a fluid-filled cavity within it.
Understanding Spinal cord
The spinal cord transmits motor commands from the brain to the body and sensory information from the body back to the brain, and it mediates reflexes. In Chiari malformation, disrupted CSF flow at the craniocervical junction is associated with the development of a syrinx (a fluid-filled cavity) within the spinal cord, a condition called syringomyelia. As a syrinx forms and expands, it can damage the surrounding cord tissue, producing symptoms such as altered sensation (especially to pain and temperature), weakness, muscle wasting, and other problems depending on its location. Understanding the spinal cord clarifies how Chiari can affect the body below the head, primarily through its association with syringomyelia.
Why it matters
Understanding the spinal cord helps families see how Chiari can cause symptoms in the body — not just the head — primarily through the syrinx that can form within the cord, affecting sensation and movement.
Common questions
What is the spinal cord?
The bundle of nerve tissue carrying signals between the brain and body.
How is it affected in Chiari?
It can develop a fluid-filled cavity (syrinx).
What symptoms result?
Altered sensation, weakness, muscle wasting, and others, depending on location.
Bottom line
The spinal cord carries signals between the brain and body; in Chiari it can develop a syrinx, causing sensory, motor, and other symptoms.
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