Spinal Stenosis

 

What is Spinal Stenosis ?

The narrowing of one or more areas within your spine is known as spinal stenosis. The amount of space available for your spinal cord and nerves that branch off your spinal cord is reduced when your spine shrinks. The spinal cord or nerves might become inflamed, crushed, or pinched as a result of a narrowed area, resulting in back discomfort and sciatica.

Spinal stenosis generally takes time to develop. The most prevalent cause is osteoarthritis, or "wear-and-tear" changes in the spine that develop as you age. As a result, even if some alterations are seen on X-rays or other imaging tests conducted for another cause, you may not have any symptoms for a long period. You may have discomfort, numbness, tingling, and/or weakness in your neck, back, arms, legs, hands, or feet, depending on where and how severe your spinal stenosis is.

How does spinal stenosis develop?

Spinal stenosis can affect any part of the spine, however it most usually affects two areas:

• Lower back (lumbar canal stenosis)
• Neck (cervical spinal stenosis)

What is lumbar canal stenosis, and what causes it?

The narrowing of the spinal canal or the tunnels via which nerves and other tissues connect with it is known as lumbar canal stenosis. The spinal canal narrows as a result of changes associated with age that reduce the canal's size, such as the displacement of one of the vertebrae out of position.

The nerve root of the spinal cord is frequently pinched when the spinal canal or side canals that protect the nerves narrow. As the canal's diameter narrows, the nerves get progressively inflamed.

Pain, numbness, or weakness in the legs, groyne, hips, buttocks, and lower back are all symptoms of lumbar canal stenosis. Walking or standing causes symptoms to intensify, whereas laying down, sitting, or leaning slightly forward causes symptoms to improve.

What is cervical spinal stenosis, and what causes it?

Cervical spine stenosis differs from other forms of stenosis because it occurs in the neck rather than the rest of the back. Cervical spinal stenosis is distinguished by more than just that. Damage to this area can be significant because it affects the spinal cord's numerous essential nerves, which connect the brain to the rest of the body.

Stenosis of the cervical spine is frequently linked to degenerative changes in the spine over time. This might result in bone spurs or a herniated disc, which narrow the spinal canal and put pressure on the spinal cord or nerve roots. With ageing, the ligaments in the spine might thicken and tighten, potentially bulging into the spinal canal. Other factors that may contribute to cervical spinal canal stenosis include:

• Tumors
• Traumatic spinal injuries
• Congenital cervical spinal stenosis (some are born with a narrow spinal canal)
• Herniated or bulging spinal discs
• Arthritis
• Spinal abnormalities
• Bone growths

Who is affected by spinal stenosis?

Spinal stenosis can affect anybody, although it is most frequent among men and women over 50. Spinal stenosis can also affect younger persons who were born with a small spinal canal. Spinal stenosis can be caused by a variety of disorders that affect the spine, such as scoliosis or a spinal injury.

What are the various segments of the spine?

The spine (or backbone) is a column or stack of 24 bones (vertebrae) plus the fused sacrum and coccyx. It runs from the base of your cranium to the bottom of your pelvis. Your spine protects your spinal cord while supporting your body's weight. Each vertebrae has a circular front piece (the body), a central ring-shaped aperture (the spinal canal), flat bony portions (facet joints) where one vertebrae meets those above and below it, and bone sections along the sides (transverse processes) and rear (lumbar spine) (laminae). The ridge you feel while running your hand down your back is part of the lamina called the spinous process. An intervertebral disc is a flat, circular pad that acts as a cushion or stress absorber between each vertebrae body. Ligaments are thick fibre bands that connect the vertebrae, stabilise the spine, and protect the discs.

The spinal cord runs down the middle of the spinal canal and is the body's "master cable cord," sending and receiving messages between the body (including muscles and organs) and the brain. The bony components of the spine fully encircle it. Nerve roots are the first part of a bundle of nerve fibres that emerge from the spinal cord and exit the spinal column through neural foramen, or side openings between the vertebrae. The nerve fibres or "nerves" (the "mini cable network") then travel throughout the body.

What causes stenosis in the spine?

There are several reasons of spinal stenosis. What they all have in common is that they alter the shape of your spine, limiting the area surrounding your spinal cord and nerve roots that escape through it. Compression or pinching of the spinal cord and/or nerve roots produces symptoms such as low back pain and sciatica.

The causes of stenosis in the spine are:

• Bone overgrowth/arthritic spurs: Osteoarthritis is a "wear and tear" condition that causes cartilage to break down in your joints, including your spine. The protective coating of joints is cartilage. The bones begin to rub against one other when cartilage goes down. Your body reacts by producing new bone tissue. Bone spurs, or bone overgrowth, are a common occurrence. Bone spurs on vertebrae protrude into the spinal canal, limiting the space and squeezing nerves. Paget's disease of the bone can lead to bone overgrowth in the spine, squeezing nerves.

• Bulging disks/herniated discs: A flat, circular cushioning pad (vertebral disc) sits between each vertebra and works as a stress absorber along the spine. The gel-like interior of these discs breaks through a weak or torn outer layer due to age-related drying out and flattening of vertebral discs, as well as breaking in the outside border of the discs. The nerves around the disc are then compressed by the bulging disc.

• Thickened ligaments: Ligaments are the fiber bands that hold the spine together. Arthritis can cause ligaments to thicken over time and bulge into the spinal canal space.

• Spinal fractures and injuries: Broken or dislocated bones and inflammation from damage occurring near the spine can narrow the canal space and/or put pressure on spinal nerves.

• Spinal cord cysts or tumors: Growths within the spinal cord or between the spinal cord and vertebrae can narrow the space and put pressure on the spinal cord and its nerves.

• Congenital spinal stenosis: This is a condition in which a person is born with a small spinal canal. Another congenital spinal deformity that can put a person at risk for spinal stenosis is scoliosis (an abnormally shaped spine).

What are the symptoms of spinal stenosis?

When spinal stenosis first appears, you may or may not have symptoms. The narrowing of the spinal canal is often a gradual and progressive process. Although spinal stenosis can occur anywhere along the spinal column, it is most frequent in the lower back (number one) and neck. Symptoms differ from person to person and might appear and go.

• Lower back (lumbar) spinal stenosis causes the following symptoms:

• Lower back discomfort. Pain can range from a subtle aching or discomfort to an electric or searing feeling. Pain comes and goes.
• Sciatica. This is discomfort that starts in your buttocks and spreads down your leg, maybe into your foot.
• Leg cramps in one or both legs due to a heavy feeling in the legs.
• Numbness or tingling in the buttocks, leg, or foot ("pins and needles").
• Leg or foot aches and pains (as the stenosis worsens).
• Standing for lengthy periods of time, walking, or walking downhill causes pain.
• Leaning, bending slightly forward, walking uphill, or sitting reduces pain.
• Loss of bladder or bowel control problems (in severe cases).

• Neck (cervical) spinal stenosis causes the following symptoms:

• Neck ache.
• Arm, hand, leg, or foot numbness or tingling. (Symptoms can occur anywhere below the nerve compression site.)
• Arm, hand, leg, or foot weakness or clumsiness.
• Issues with balancing
• Loss of hand function, such as difficulty in writing or buttoning clothing.
• Loss of bladder or bowel control problems (in severe cases).

Is it possible that spinal stenosis may leave you paralysed permanently?

Although spinal constriction might cause discomfort, it seldom results in paralysis. Permanent numbness and/or paralysis can occur if a spinal nerve or the spinal cord is crushed for an extended length of time. This is why, if you suffer numbness or weakness in your arms or legs, you should consult your healthcare professional straight soon.

Imaging tests will be performed on your spine to establish the precise location, nature, and degree of the disease. It includes:

• X-rays: X-rays emit a limited amount of radiation and can reveal changes in bone structure, such as disc height reduction and the formation of bone spurs that narrow the spine's space.
• MRI: Magnetic resonance imaging (MRI) creates cross-sectional pictures of the spine using radio waves and a strong magnet. MRI pictures show the nerves, discs, spinal cord, and the existence of any malignancies in great detail.
• CT-Scan: A computed tomography (CT) scan, also known as a CT myelogram, is a series of X-rays that provide cross-sectional pictures of the spine. A contrast dye is used in a CT myelogram to help show the spinal cord and nerves more clearly.

What is the procedure for detecting spinal stenosis?

Your doctor will go over your medical history, inquire about your symptoms, and perform a physical examination. Your healthcare practitioner may feel your spine during your physical exam, pressing on different areas to discover whether this creates pain. Your doctor may probably ask you to bend in different directions to examine whether different postures of your spine cause pain or other symptoms. Your provider will assess your balance, movement, and walking patterns, as well as your arm and leg strength.

Is it possible to prevent spinal stenosis?

You can't completely prevent spinal stenosis because the majority of causes are age-related "wear and tear" disorders like osteoarthritis and loss of bone and muscle mass. You may, however, take steps to reduce your risk or slow the growth, such as:

• Maintain a healthy diet and a healthy body weight.
• Avoid smoking: If you smoke, give it up. To stop, get help from your healthcare practitioner.
• Maintain a healthy posture.
• Exercise: Stay active while avoiding painful exercises. Before beginning a home fitness regimen, consult your doctor or physical therapist. Too much sleep might be dangerous rather than beneficial.

If I have spinal stenosis, what can I expect?

First, because spinal stenosis develops slowly over time, you may not notice any symptoms even if your spine is changing. Depending on where the stenosis is located, you may have pain, numbness, tingling, or weakness in your back, neck, arms, or legs. Conservative therapies, such as pain relievers and anti-inflammatory medications, cold or heat, and physical therapy, may be sufficient to ease discomfort temporarily. As your stenosis worsens and your quality of life declines, speak with your healthcare physician.