The pia mater has paired specializations called denticulate ligaments, which extend laterally from the surface of the spinal cord and pierce the arachnoid to attach to the inner aspect of the dura mater at 21 pairs of denticulations (dentate means tooth-like – these are tooth-like lateral projections).
What extends laterally from the spinal cord and attaches to the dura matter?
Pia mater – The innermost covering of the spinal cord, intimately adhering to its surface, it stabilizes the spinal cord through lateral extensions of the pia called the denticulate ligaments, extending between the ventral and dorsal roots unto the dura mater.
What extends laterally from the spinal cord and attaches to the dura mater helping to limit lateral movement of the spinal cord?
Lateral extensions of the pia along the spinal cord, called denticulate ligaments, pass through the arachnoid and attach to the dura thereby helping to stabilize the “floating” spinal cord preventing lateral movements.
What extends laterally from the spinal cord?
The cord is stabilized within the dura mater by the connecting denticulate ligaments, which extend from the enveloping pia mater laterally between the dorsal and ventral roots. The dural sac ends at the vertebral level of the second sacral vertebra.
Which part of the spine is responsible for linking the vertebrae together?
The facet joints link the vertebrae together and give them the flexibility to move against each other. Each vertebra has a hole in the center, so when they stack on top of each other they form a hollow tube that holds and protects the entire spinal cord and its nerve roots.
What are the three areas of the spine?
The spine has three normal curves: cervical, thoracic and lumbar. There are seven cervical vertebrae in the neck, 12 thoracic vertebrae in the torso and five lumbar vertebrae in the lower back.
What is the extent of spinal cord?
The spinal cord extends from the foramen magnum where it is continuous with the medulla to the level of the first or second lumbar vertebrae. It is a vital link between the brain and the body, and from the body to the brain. The spinal cord is 40 to 50 cm long and 1 cm to 1.5 cm in diameter.
What muscles attach c2?
- attached to the anterior surface of the vertebral body. longus colli.
- attached to transverse processes. levator scapulae. scalenus medius. splenius cervicis.
- attached to spinous processes. semispinalis cervicis. rectus capitis posterior major. …
- attached to posterior surface of lamina. multifidus and longissimus.
What muscles run along your spine?
The Muscles that Move the Spine
- Sacrospinalis. There are three groups of muscles that make up the sacrospinalis. …
- Spinalis and Iliocostalis. The spinalis are muscles that are closest to the spine. …
- Longissimus and Quadratus Lumborum.
What is the muscle next to your spine?
The spinalis muscles are closest to your spine. They’re the smallest of the paraspinal muscles, and they help you bend backward and side to side.
What is the function of spinal dura mater?
The dura mater is a sac that envelops the arachnoid and has been modified to serve several functions. The dura mater surrounds and supports the large venous channels (dural sinuses) carrying blood from the brain toward the heart. The dura mater is partitioned into several septa, which support the brain.
What happens if the dura mater is damaged?
If your spine still has a dural tear, your spinal cord will leak this cerebrospinal fluid over time. This results in symptoms that include: Spinal Headache – Severe headache that may disappear when laying down. Spinal Meningitis – Sensitivity to light, fever, fatigue, headache, vomiting, and possibly seizures.