What is a shallow longitudinal groove on the posterior surface of a spinal cord structure?

What is the name of the shallow groove on the posterior surface of the spinal cord?

On the dorsal surface of the spinal cord, there is a shallow groove named the dorsal (or posterior) median sulcus. The dorsal septum, composed of pial tissue, extends from the base of this sulcus almost to the commissural gray matter.

What is the groove in the spinal cord called?

The posterior median sulcus is the groove in the dorsal side, and the anterior median fissure is the groove in the ventral side. Each segment of the spinal cord is associated with a pair of ganglia called dorsal root ganglia, situated just outside of the spinal cord.

What are the two grooves on the surface of the spinal cord?

Two prominent grooves, or sulci, run along its length. The posterior median sulcus is the groove in the dorsal side, and the anterior median fissure is the groove in the ventral side.

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Which of the following provides longitudinal stability for the spinal cord?

a slender strand of fibrous tissue, extends from inferior tip of the Conus medullar is along the length of the vertebral canal as far as the dorsum of the coccyx. Provides longitudinal support to the spinal cord as a component of the coccygeal ligament. Every spinal segment has a pair.

What sulci and fissures are visible on the surface of spinal cord?

The spinal cord has fissure and sulci. The anterior median fissure is located centrally, and the anterior white commissure is present at its base. The posterior median sulcus is present posteriorly, and the posterolateral sulcus is present on either side of it. The anterior nerve roots exit at the anterolateral sulcus.

Which spinal nerves affect which parts of the body?

The nerves of the cervical spine go to the upper chest and arms. The nerves in your thoracic spine go to your chest and abdomen. The nerves of the lumbar spine then reach to your legs, bowel, and bladder. These nerves coordinate and control all the body’s organs and parts, and let you control your muscles.

What are two functions of spinal cord?

The main functions of the spinal cord are:

  • To conduct reflexes below the neck.
  • To conduct messages from the skin and muscles to the brain.
  • To conduct commands from the brain to muscles of the trunk and limbs.

What continues downward as the spinal cord?

Cauda equina: The spinal cord ends about three fourths of the way down the spine, but a bundle of nerves extends beyond the cord. This bundle is called the cauda equina because it resembles a horse’s tail. The cauda equina carries nerve impulses, both motor and sensory, to and from the legs.

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What is the structure of spinal cord?

The spinal cord is a cylindrical structure of nervous tissue composed of white and gray matter, is uniformly organized and is divided into four regions: cervical (C), thoracic (T), lumbar (L) and sacral (S), (Figure 3.1), each of which is comprised of several segments.

Does your spine have ligaments?

Ligaments. The ligaments are strong fibrous bands that hold the vertebrae together, stabilize the spine, and protect the discs. The three major ligaments of the spine are the ligamentum flavum, anterior longitudinal ligament (ALL), and posterior longitudinal ligament (PLL) (Fig. 7).