Things you need to know about your lumbar spine!

When we talk about back pain, sometimes it's so bad that we can't even sit or stand, right? Actually, the lower part of our back, that's what doctors call ( Do you know how important the area called the lumbar spine is to our entire body? It's like the main pillar that supports the weight of our body. So, today we're going to talk about this in detail, very simply, like we're talking to a friend.

What is the Lumbar Spine? Let's find out simply!

Okay, let's first look at what the Lumbar Spine is. This part is made up of five vertebrae at the very bottom of your spine. These are called L1, L2, L3, L4, and L5. These five vertebrae are the largest and strongest vertebrae in the entire spine. Think of them as the largest stones in the foundation of a building.

These vertebrae are located below your 12 thoracic vertebrae and above your sacrum, a triangular bone. Compared to the other vertebrae, they are large and thick, like square bricks . They provide stability to your spine and pelvis. They are also where many muscles and ligaments attach.

The one that carries the most weight on your body is the one on your body. The lumbar spine is the main center for maintaining balance . The muscles and ligaments attached to this lumbar spine help you walk, run, sit, lift weights, and turn your body from side to side.

Importantly, our lumbar spine has a slight inward curve. This is called a lordotic curve . This is a natural position.

What service does the lumbar spine provide to our body?

Now let's see what functions this lumbar vertebra performs for our body.

• Upper body support and weight distribution: The vertebrae in your neck ( The cervical spine , thoracic spine, and head are all supported by the lumbar spine. It also connects to your pelvis and bears the weight of the body, and it is this part that bears the brunt of the pressure when lifting or carrying something. It is this same part that transfers the weight from the upper body to the legs.
• Body movement: The muscles in your hip area and the flexibility of your lumbar spine allow you to move your torso forward, backward (flexion and extension), side to side (side bending), and all the way around (rotation). Most of these movements are facilitated by the last two lumbar vertebrae.
• Protection of the spinal cord and cauda equina: The spinal cord, which starts at your brain and runs down to your first lumbar vertebra (L1), runs inside these vertebrae. Much like a wire runs inside a cable. So these vertebrae provide good protection for the spinal cord. The collection of nerves that run down from the end of the spinal cord is called the cauda equina (so named because it looks like a horse's tail). These nerves are also protected inside the vertebrae.
• Controlling leg movements: Nerves that come out of your lower spinal cord and cauda equina control sensation and movement in your legs.

What are the muscles and other soft tissues in the lumbar spine?

Let's now look at the muscles, discs, and ligaments around this lumbar vertebra.

Lumbar muscles

Together with your abdominal muscles, the muscles of your lumbar spine are what move your trunk and hips. These muscles and ligaments provide strength and stability to your lower back. They also help you bend forward, backward, and rotate. There are several main types of these muscles:

• Latissimus dorsi: This is the large, flat, triangular muscle in your middle and lower back. It helps you lift weights with your arms, lift your ribs to breathe, and bend to the side.
• Iliopsoas: This is a group of three muscles. It moves your hip joint. It helps keep your hips and lower back stable when you walk, run, and get up from a chair.
• Paraspinals: These three muscle groups are located along the spine. They help you extend, bend, rotate, and maintain an upright posture.

Lumbar Discs

Between the vertebrae there is something like a "shock absorber cushion" . These are called intervertebral discs . There are five such discs between the vertebrae in the lumbar spine. These not only absorb the shocks that occur when you move and jump, but also help to support the weight that comes down the spine and allow movement between the vertebrae.

Often, the discs in this lumbar spine are the ones most likely to degenerate or herniate. When this happens, you may experience back pain or pain that radiates down your legs.

Ligaments of the lumbar spine

Ligaments are the band-like structures that connect bones to each other. They help keep the spine stable, allow for smooth movement, and absorb shock in the event of an accident. There are several major ligaments, for example:

• Anterior longitudinal ligament: This runs along the front of the lumbar vertebrae. It stabilizes the joints and limits backward bending.
• Posterior longitudinal ligament: This runs along the back of the vertebrae. It limits forward bending.

There are many other specialized ligaments, such as the supraspinous ligament , interspinous ligament , ligamentum flavum , intertransverse ligament , and iliolumbar ligament . Each of these helps control various movements of the spine and maintain stability.

Spinal Cord

As we mentioned earlier, the spinal cord is a bundle of nerve tissue. It runs from the base of the brain down to about the L1 vertebra. It carries messages from the brain to the muscles, and from the muscles to the brain. The remaining nerve roots, called the cauda equina , run down the spinal canal.

Lumbar nerves

There are five pairs of nerves that branch out from the vertebrae L1 through L5 in your lumbar spine to the right and left. These nerves travel down the spine and join with other nerves to form a network of nerves. This is what controls pain signals and movement in your legs.

• L1 nerve: Provides sensation to the groin and genital areas, helps move the hip muscles.
• L2, L3, L4 nerves: Provide sensation to the front of the thigh and the inner side of the lower leg. They also control the movement of the hip and knee muscles.
• L5 nerve: Provides sensation to the back of the lower leg, the top of the sole of the foot, and the area between the big toe and the second toe. It also controls movement of the hip, knee, foot, and toes.
• Sciatic nerve: This is formed by the union of the L4 and L5 nerves and other sacral nerves. This is the largest nerve in the body. It starts at the back of the pelvis, runs down the leg, and ends at the foot.

Blood Vessels of the Lumbar Spine

The branches of the abdominal aorta, the largest artery in your abdomen, supply blood and nutrients to the lumbar vertebrae, muscles, and ligaments.

What are the diseases and disorders that affect the lumbar spine?

Unfortunately, there are many problems that can affect our lumbar spine. These problems can cause limited movement in the back or hips, and can cause pain, weakness, and numbness in the back, hips, thighs, or legs.

Here are some diseases and conditions that affect the lumbar spine:

• Lower back pain: This is a common symptom that many people experience and can be caused by a variety of conditions. It can be caused by degenerative conditions of the spine (such as osteoarthritis , ankylosing spondylitis , spinal stenosis , herniated disc , pinched nerve ), spinal sprains, spinal fractures , tumors, cysts, bone spurs , and spondylolisthesis .
• Lumbar stenosis: This is a narrowing of the spinal canal, which reduces the space available for the nerves that exit the spinal cord. This can cause nerve compression, pain, numbness, and weakness in the legs. These symptoms may worsen when walking or standing, and may be relieved by lying down, sitting, or bending forward slightly.
• Spondylolisthesis: This is when one lumbar vertebra slips forward relative to the vertebra below it. This can compress a nerve and cause back pain or leg pain.
• Vertebral compression fracture: A fracture of the spine. This can happen to someone with osteoporosis, even from a minor accident. It can also happen from a car accident or a fall from a height.
• Sciatica: Also called lumbar radiculopathy , this is nerve pain caused by damage or irritation to the sciatic nerve. It can be caused by things like a herniated disc, spondylolisthesis, osteoarthritis, a spinal injury, piriformis syndrome , or cauda equina syndrome .
• Herniated disk: A herniated disk, which is a cushion-like structure between the vertebrae, bulges, tears, or bulges out of its contents. This can cause back pain, numbness in the legs/feet, and muscle weakness.
• Lumbar lordosis (or "swayback"): Excessive curvature of the lower back, which places undue pressure on the lumbar vertebrae.
• Muscle spasm: There are large muscles that support the lumbar spine. These muscles can become tight or spasm. This is also a common cause of back pain.
• Degenerative disk disease: The discs in the lumbar spine wear down. When the space between the vertebrae decreases, nerves can become compressed and cause back pain.
• Adult scoliosis: This is a sideways curvature of the spine. This condition can occur in the lumbar spine as we age or as the spine degenerates.
• Cauda equina syndrome: A condition caused by compression of the cauda equina, a collection of nerve roots that looks like a horse's tail. This can cause severe symptoms such as pain, weakness, and loss of bowel and bladder control. This is a medical emergency.

How to diagnose lumbar spine disease?

When you have back pain, a doctor will first ask about your medical history, medications you take, and symptoms, perform a physical examination, and order tests and scans if necessary.

Types of tests and scans commonly performed:

• Computed tomography (CT) scan: This uses X-rays and a computer to create very thin "slice" images of the area being examined. This can help identify things like the shape and size of the spinal canal, bone spurs (osteophytes) , bone fusion, and bone destruction caused by infection or tumors.
• Magnetic resonance imaging (MRI): This uses a large magnet, radio waves, and a computer to produce detailed images. It can detect problems with the spinal cord and nerve roots, such as spinal degeneration, herniated discs, infections, and tumors. It provides a clearer picture of the nerves than a CT scan.
• X-rays: These use a small amount of radiation to take pictures of bones and soft tissues. They can look for things like fractures, disc problems, spinal stenosis, and arthritis.
• EMG (Electromyogram) and nerve conduction studies: An EMG checks the health and function of nerves and muscles. A nerve conduction study measures how quickly an electrical impulse travels through a nerve. These tests can help identify nerve damage and nerve compression.
• Myelogram: This test looks at the connections between the vertebrae and discs, the spinal cord, and the nerve roots. It can check for any problems, such as a tumor, bone spur, or herniated disc, that are pressing on the spinal cord or nerves.

How are lumbar spine problems treated?

Many conditions affecting the lumbar spine have both nonsurgical and surgical treatments. The treatment method you choose depends on the cause of the problem and its severity.

What are the non-surgical treatment options?

For back pain that is not caused by an accident or tumor, your doctor may first recommend less invasive treatments. Some common non-surgical treatments include:

• Rest.
• Ice or hot compress.
• Avoiding work that is tiring or increases pain.
• Physical therapy.
• Medications: Muscle relaxants, pain relievers (e.g. , acetaminophen ), and anti-inflammatory medications (e.g., ibuprofen , naproxen ).
• Steroid injections: There are three types of steroid injections that can be considered specifically for low back pain.
• Lumbar epidural block: In this, steroids are injected into the epidural space (the space next to the covering of the spinal cord).
• Lumbar facet joint block: In this, steroids are injected into the capsule of the facet joint (the small joint that connects the vertebrae).
• Interlaminar injection or transforaminal injection: In this, the steroid is injected into the area between the spine and the spinal cord.
• Medical branch block and radiofrequency ablation: This treatment is considered for some chronic low back pain. First, a local anesthetic is injected into the nerve that supplies the facet joint. If the pain subsides, the next step is to stabilize the pain. This is done by damaging the nerve with a technique called radiofrequency ablation . Pain relief can last for months. However, if the nerve regenerates, the pain can return.

How do I know if I am suitable for lumbar spine surgery?

You may be eligible for lumbar spine surgery if:

• If other treatments do not help.
• If your lower back, hip and/or leg symptoms are getting worse. (Surgery is usually done for leg pain rather than back pain.)
• If you are healthy enough to have surgery.

Surgery is the first-line treatment for conditions such as trauma (e.g., a car accident), cancer, epidural abscess (an infection between the spinal cord and the covering of the spinal cord), bone infection (osteomyelitis) , cauda equina syndrome, or conus medullaris syndrome (a type of spinal cord injury).

What are the surgical options for lumbar spine conditions?

There are several commonly performed surgical procedures:

Lumbar spinal decompression surgery

This is a general term. It refers to a variety of surgeries that are performed to relieve symptoms caused by pressure on the spinal cord or nerve roots. Common surgeries to relieve pressure include:

• Lumbar diskectomy: In this procedure, the surgeon removes part of a disk and relieves pressure on nearby nerve roots.
• Lumbar laminotomy or laminectomy: In this procedure, the surgeon removes a small portion of the bony arch (lamina) of the spinal canal. In a laminotomy, only a small piece of the lamina is removed. In a laminectomy, the entire lamina, along with any bone spurs, disc fragments, and thickened ligaments, is removed. Removing the lamina increases the space in the spinal canal and relieves pressure.
• Lumbar foraminotomy or foraminectomy: Both of these surgeries are performed to enlarge the openings through which the nerve roots exit the spinal cord, by removing some of the bone in that area. In a foraminectomy, a larger amount of bone is removed.
• Lumbar corpectomy: In this surgery, the surgeon removes the vertebral body (the large front part of the vertebra) and the disc to relieve pressure on the spinal cord. Sometimes, the vertebrae are then fused together to stabilize the lumbar spine.

Lumbar disk replacement surgery

In this, a diseased lumbar disc is removed and an artificial disc is inserted. The main reason for this is degenerative disc disease. However, in recent years, this surgery has become less common due to complications from the surgery.

Lumbar spinal fusion surgery

In this procedure, one or more lumbar vertebrae are permanently connected together. This surgery eliminates movement between the vertebrae.

Functional electrical stimulation (FES) for spinal cord injury

This method uses small electrical impulses to activate the muscles and nerves in the lower body controlled by the lumbar nerves and attempts to restore their function.

Is it possible to have minimally invasive lumbar spine surgery?

Talk to your surgeon. In many cases, minimally invasive surgery is now being performed instead of traditional open surgery. Rather than making one large incision through the skin in traditional surgery, minimally invasive surgery is performed through one or more small incisions. Because the incisions are small, there is less damage to the muscles and soft tissues.

Your lumbar spine is the lower part of your spine. It is made up of five vertebrae (L1-L5). This area contains the intervertebral discs, the spinal cord, and the nerves, muscles, tendons, and ligaments. Your lumbar spine supports the weight of your body and allows for a variety of body movements. Many diseases and disorders can affect the lumbar spine. Fortunately, there are many nonsurgical and surgical options to treat these conditions.

Final Take-Home Message

Well, we've talked a lot about the lumbar spine today, haven't we? Remember, your lower back is a very important part of your entire body.

• If you have persistent lower back pain, pain that radiates down your legs, numbness, or weakness , don't just ignore it. Be sure to see a doctor for advice.
• It is very important to use correct posture when lifting weights and doing daily tasks.
• Exercise, especially exercises that strengthen your back and abdominal muscles, is very good for the health of your lumbar spine.
• Remember, not all back problems require surgery. In many cases , relief can be achieved with non-surgical treatments.

So, take care of your lumbar spine. It will help keep you healthy throughout your life!

` Lumbar Spine, Back Pain, Spinal Cord, Vertebrae, Nerves, Back Surgery