Understanding Your Spinal Anatomy

Understanding the anatomy of your spine’s structure will help to better comprehend radiculopathy and sciatica. Your spine works to support your body, allows you to be flexible and move, as well as protects your spinal cord and nerves. A healthy spine will have an S-shaped curve. Your neck and low back have soft forward curves, while your mid back and sacral spine have small backwards curves. These natural curves aid in movement and shock absorption. These curves and your spinal discs aid in distributing weight and forces evenly through your spine. If your spine was straight instead of an S-shape it would take tremendous wear and tear creating significant spinal disorders. These S-shapes allows a portion of the weight and forces to be distributed to your spinal discs, and not solely to the vertebrae below much like a spring. Overtime, this wear and tear with the aging process result in degeneration of these discs. 

What Structures Make Up Your Spine?

The structure of your spine consists of over one-hundred twenty (120) muscles, two-hundred twenty (220) ligaments, one-hundred joints (100), thirty-three (33) vertebrae. Your spine consists of many complex structures:

• Vertebrae are the small bones that are stacked or aligned to created your spinal canal. These thirty-three (33) bones protect the delicate structures of your spinal cord and nerves

• Intervertebral discs are the flat round cushions that sit between each vertebrae and act as shock absorbers. Each vertebral disc has a soft gel like center with a tougher but flexible outer ring. Under pressure or intense forces this inter gel like center can squeeze out through the outer ring of the disc causing a herniation. This disc material can thencompress your nerves or spinal cord resulting in sciatica or radiculopathy.  

• Spinal cord and nerves make up your spinal canal and run under the vertebrae from the base of your skull to your low back. Thirty-one (31) pairs of nerves branch off from your canal through small openings in the vertebrae. These nerves carry messages between your brain to your muscles. When disc material compress these nerve roots  you often end up with nerve pain referred to as radiculopathy. 

• Facet joints are the connections between each spine level. These are located on the posterior (backside) of the vertebral body and provide structural stability to the spine.   They also limit and guide the motion of each spinal level. These joints can be a significant source of pathology including arthropathy, infection, inflammation, tumors, and trauma. 

• Soft tissues are the non-bony and non-disc aspects of the spine that are primarily muscles, ligaments, and tendons. These muscles and ligaments provide stability, strength, and facilitate spinal movement. Injuries to soft tissues of the spine may be tears or sprains/strains such as whiplash. 

What Are the Different Segments of the Spine? 

The thirty-three (33) vertebrae and thirty-one (31) pairs of spinal nerves that comprise your spine are divided into five segments: 

• Cervical vertebrae are the first seven (7) vertebrae of your spine in your neck. These levels are identified as C1 being the first and highest neck bone through C-7 being the last (C1-C7). There are eight pairs of cervical nerve roots, with one member of the pair exiting on the right side your vertebrae, and the other on the left side. 

• Thoracic vertebrae are the vertebrae located in your upper-mid back. These twelve (12) vertebrae or levels start just below the last cervical vertebrae at T1, and continue down the spine to T12 (T1-T12). There are twelve (12) pairs of thoracic nerve roots that exit at each level, with one member of the pair exiting on the right side, and the other on the left. 

• Lumbar vertebrae are the vertebra located in your low back. These five (5) vertebrae start just below T12 at L1 and continue down your spine to the last lumbar vertebrae at L5 (L1-L5). There are also five (5) pairs of lumbar nerves that exit at each level, with one member of the pair exiting on the right side, and the other on the left. 

• Sacral vertebrae are the vertebrae that are located in your pelvis. These five (5) vertebrae start below L5 at S1 and continue down your spine to the last sacral vertebrae at S5 (S1-S5). There are also five (5) pairs of sacral nerves that exit at each level, with one member of the pair exiting on the right side, and the other on the left. 

• Coccyx vertebrae are four (4) small vertebra that are fused together to form your tailbone. There is only one (1) pair of coccygeal (Co1) nerves that meet in the area of the tailbone. 

What is Radiculopathy? 

Radiculopathy is a medical condition characterized by compression, irritation, or inflammation  of spinal nerve roots, this leads to pain, numbness, tingling, or weakness along the path of the affected nerve. This condition can occur in the cervical, thoracic, or lumbar regions. Radiculopathy most commonly occurs in the cervical and lumbar areas of the spine.

Common Causes

• Spinal stenosis

• Degenerative disc disease

• Bone spurs

• Spinal injury or trauma

• Herniated discs 

Symptoms and Presentation

Symptoms of radiculopathy vary depending on the location of the affected nerve root.

• Decreased sensation in the skin

• Numbness of tingling sensations

• Sharp burning pain that radiates along the nerve path

• Muscle weakness or loss of reflexes

Diagnosis and Treatment

To properly diagnose radiculopathy your physician will typically review your medical history, conduct a physical examination, and order imaging studies such as a x-ray, MRI, or possible nerve test called EMG. Fortunately, the majority of patients can obtain relief of their symptoms with conservative treatment modalities and time. Initial conservative modalities may include anti-inflammatories, physical therapy, and activity modifications such as avoiding activities that cause strain to the back or neck. If you do not respond to the initial course of conservative treatment a referral to pain management may be recommended to obtain an epidural steroid injection or nerve block. For most patients, this will help reduce inflammation and nerve irritation to lessen the symptoms of radiculopathy. You may need additional repeat injections if you did not achieve relief of your symptoms, or if the relief of your symptoms was not lasting. 

Unfortanently, some patients will exhaust conservative treatment modalities and not achieve symptom relief. In this situation your chronic nerve pain may be affecting or limiting your daily activities. This persistent discomfort can make routine tasks feel like monumental challenges. At this point surgical intervention such as a microdiscectomy or laminectomy may be appropriate to consider. A microdiscectomy is a minimally invasive surgery to remove the portion of herniated disc material. A laminectomy is performed by removing a portion or all of the lamina (vertebral bone). This helps create space to relieve pressure on your spinal cord or nerves. A proper diagnosis and early intervention can significantly improve your outcomes, hopefully allowing you to avoid a surgical procedure. 

Understanding Sciatica

Sciatica is a common condition that can cause significant pain and discomfort. It occurs when your sciatic nerve, the largest and longest nerve in your body becomes injured, irritated, or compressed. Your sciatic nerve is actually not one (1) nerve, it is a bundle of five (5) nerves that branch off from your spinal cord. Your sciatic nerve extends from your low back, through an opening (sciatic notch) deep in your buttock, crosses behind muscles located deep in your hip joint, descends down the back portion of the upper thigh, to the back of your knee. Here the nerve divides into two branches. One brach continues down the back of your calf to your heel and sole of your foot. The other branch runs along the outer part of the knee to the lower leg and foot. Your sciatic nerve has both sensory and motor fibers. These fibers provide not only sensation, but function to your lower limbs. 

Common Symptoms

The primary attribute of sciatica is a shooting pain that travels along the above path of the sciatic nerve and spreads down your buttock to the back of one thigh or from your buttock down to the bottom of your foot.  This compression leads to a distinct type of nerve pain that can vary from tolerable to severe. Some patients will describe their symptoms as a dull ache, while others will experience a sharp, burning sensation, numbness and tingling, or even weakness. 

Common Causes

Numerous factors can contribute to the development of sciatic:

• • Herniated discs occur when the soft inner portion of a spinal disc protrudes through the tougher outer shell, often times pressing on the nerve roots that exit the spine.

• • Spinal stenosis is a condition where the spinal canal narrows, which can also put pressure on surrounding nerves. 

• • Spondylolisthesis is when a vertebra moves or slips out of place compared to the subsequent adjacent vertebrae. 

• • Compression fractures occur when there is a fracture in a vertebra causing it to collapse.

• • Osteoarthritis or spinal arthritis occurs from wear and tear or degenerative changes in the spine.

• • Scoliosis is an abnormal sideways curvature of the spine. 

Risk Factors

Risk factors for developing radiculopathy include:

• • Aging

• • Being overweight

• • Poor posture

• • Improper lifting techniques

• • Repetitive motions

• • A family history of degenerative bone conditions

• • Smoking

Diagnosis and Treatment

Sciatica is typically diagnosed by reviewing your medical history and a physical exam. Your physician may ask various questions about the location of your pain and symptoms. Additional diagnostic studies such as x-rays, magnetic resonance imaging (MRIs), or elcectomygraphy (EMG), may be recommended.  Sciatica will usually heal on its own with time and conservative treatment. Sciatica often results from a spinal issue that puts pressure on the sciatic nerve. If your sciatica is caused by a lumbar disc herniation, spinal stenosis, degenerative disc disease, or spondylolisthesis your physician may recommend a surgical procedure. To help relive the pain, treatment often includes:

• • Heat or cold therapy

• • NSAIDs

• • Physical therapy

• • Epidural steroid injections

• • Nerve blocks 

• • Massage 

• • Microdiscectomy

• • Laminectomy 

Common Symptoms of Radiculopathy and Sciatica 

Pain Sensations and Pattern

The classic symptom of both radiculopathy and sciatica is radiating pain. This discomfort or nerve pain typically follows the path of the affected nerve, creating a distinct pain pattern known as a dermatome. With radiculopathy you may experience sharp, burning, or electric like pain that travels from your spine to your extremities. Sciatica specifically involves pain that radiates from your low back, down the back of your thigh or from your low back to the bottom of your foot. With this pain you may also be experiencing:

• • Muscle weakness or difficulty moving certain body parts

• • Numbness or tingling sensations in the affected area

• • Heightened sensitivity to touch

Location Specific Symptoms

The location of your symptoms provide valuable clues about which spinal nerves are being affected. When a spinal nerve is compressed, irritated, or injured it may be on the left, right, or both sides of your spine. All three locations will produce varying symptoms. 

• • Cervical radiculopathy involves pain, numbness, or weakness in your neck, shoulder, arm, or hand.

• • Thoracic radiculopathy involves discomfort in your upper abdomen or chest wall.

• • Lumbar radiculopathy (including sciatica) involves pain in lower back, buttock, leg, or foot. 

While radiculopathy and sciatica are often used interchangeably, radiculopathy and sciatica are not the same. Sciatica refers to symptoms caused by compression or irritation of the sciatic nerve, and is actually a type of lumbar radiculopathy. Remember all cases of sciatica are radiculopathy, but not all radiculopathy is sciatica. 

At Kalra Brain & Spine in Frisco, Texas, Ricky Kalra, M.D. is a board certified, spine fellowship trained neurosurgeon who specializes in conservative management, second opinions, and minimally invasive spine surgery. Dr. Kalra is known for his bed side manner and has stated “One of the most important things we do at Karla Brain & Spine is to make sure our patients have all the information they need about their condition and treatment options so they can make an informed decision about their health care.” Dr. Kalra has been recognized as a D Best Neurosurgeon in Dallas by his physicians colleagues from 2017-2023. If you have unanswered questions about your arm or leg pain, need a second opinion, or to obtain the neurosurgical treatment you need call Kalra Brain & Spine at (972) 905-9226 or request an appointment on our website.   

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When Should I Consider Spine Surgery for Neck or Back Pain?

You Have Exhausted Non-Surgical Treatments

If you have had ongoing, debilitating pain for months despite trying multiple non-operative treatments, you may be a candidate for spine surgery. Imaging studies like MRIs can identify pathology such as herniated discs, spinal stenosis, or degenerative disc diseases that may be the source of your pain. If your daily activities and ability to work or enjoy life are limited, spine surgery may be an option for relief.

After You Have Given Your Injury or Condition Time 

A significant portion of back and neck pain will resolve on its own over a few weeks to few months time frame with conservative treatment. Spine surgery is typically only considered if non-surgical options like lifestyle modifications, physical therapy, medications, and injections, fail to provide adequate relief. Being patient is often difficult when you are in pain, but it is often needed to fully heal from many spinal conditions and injuries. Surgery can be considered for persistent, severe pain or disability that significantly impacts your quality of life. Only you know how bad your pain is, and the decision to proceed with surgery should be yours. There are times when spine surgery is absolutely essential to prevent further injury or permanent damage, however most spine surgery is elective. 

You Have a Potential Surgical Diagnosis 

You have exhausted non-surgical treatments and given adequate time for healing. You have not achieved relief and have a diagnosis that may benefit from surgical intervention. The most common spinal pathologies that can potentially benefit from surgery include: 

• • Herniated, bulging, or ruptured discs pressing on nerves or your spinal cord
  • Spinal stenosis (narrowing of the space for nerves or spinal cord) 
  • Degenerative disc disease
  • Spondylolisthesis (vertebral slipping)
  • Spinal instability 
  • Scoliosis
  • Vertebral factures
  • Spinal tumors

The type of surgical procedure that is recommended depends on your specific condition and symptoms. Surgical spine procedures aim to decompress pinched nerves, stabilize the spine or both.

Am I a Candidate for Spine Surgery?  

Symptoms Persist Despite Conservative Treatments

Spine surgery is typically only recommended after non-surgical treatments have been exhausted without providing adequate relief. Conservative approaches like physical therapy, medications, lifestyle modifications, and epidural steroid injections, and or facet injections are usually attempted first for a minimum of six to twelve weeks. If your symptoms persist or worsen despite these efforts, then you may be a candidate for spine surgery. Common indications include chronic neck or back pain, radiating arm or leg pain, numbness, weakness, or loss of function that severely impacts your daily activities and quality of life. 

Diagnostic Imaging Confirms Need for Surgery

Imaging studies such as an MRI, or CT are essential for diagnosing the underlying spinal condition or pathology causing your symptoms. Conditions that may warrant surgery may include spinal stenosis, herniated discs, degenerative disc disease, spondylolisthesis, spinal instability, bone spurs, or spinal deformities. Dr. Kalra will review images, your symptoms and neurological examination to determine what is generating your pains. Dr. Kalra will then present his opinion and your potential treatment options. Together you will decide if and when to proceed with surgery. 

You Have Realistic Expectations and Are Motivated

Spine surgery outcomes are optimized when patients have a clear understanding of the risks, benefits, recovery process, and realistic goals. You may be a good candidate if you are motivated to improve your situation, can comply with post operative restrictions, and have the ability and support system for rehabilitation. Dr. Kalra will ensure you understand the procedure, have reasonable expectations about reducing pain and symptoms, and are mentally prepared for the road ahead. A positive mindset greatly improves outcomes. 

What Spinal Conditions May Require Surgery? 

Herniated Discs

One of the most common reasons patients consider spine surgery is a herniated disc. Your spinal discs act as cushions between the vertebrae, but injury or degeneration can cause them to bulge out and press on nerves or your spinal cord. This compression leads to pain, numbness, tingling, and weakness in the affected areas. Surgery aims to remove or repair the damaged material to relieve pressure on the nerves and spinal cord. A microdiscectomy is a minimally invasive procedure to access and remove the the portion of herniated disc.   

Spinal Stenosis

Spinal stenosis refers to the narrowing of spaces in the spine that put pressure on the spinal cord and nerve roots. It can occur in the neck (cervical stenosis) or lower back (lumbar stenosis). Causes include overgrowth of bone causing bone spurs, herniated discs, or thickened ligaments. Symptoms like numbness, weakness, and cramping pain in the legs or arms may not respond well to conservative treatments. Surgical options aim to decompress the area by removing bone, disc material, overgrowth of bone, herniated discs, or thickened ligaments. Surgical options to relieve spinal stenosis may include laminectomies, foraminoties, or facetectomies. 

Degenerative Disc Disease 

The discs between your vertebrae can degenerate and break down overtime due to injury and age related changes. As your discs lose hydration and height, it can lead to instability, compression, and irritation of the nearby nerves. Along with pain, it can cause numbness, tingling, and muscle weakness. Surgical options like spinal fusion are considered to treat degenerative disc disease when conservative treatments fail to provide relief. During the fusion the damaged discus is removed and the adjacent vertebra are fused together with bone grafts or implants. This eliminates motion and prevents nerve compression at that level. 

Spondylolisthesis 

Sondylolisthesis occurs when one vertebra slips forward over the one below it. It can be caused by a defect present at birth or degeneration and arthritis over time. The displaced bone can pinch nerves, causing lower back pain that radiates down the legs. Laminectomies and spinal fusions are common surgical treatments to stabilize the slipped vertebra and decompress the pinched nerves. More severe slips may require more complex reconstructive surgery. Determining if spine surgery is appropriate depends on various factors like symptom severity, condition progression, and failure of conservative care. Careful evaluation by an experienced spine surgeon is essential to understand all treatment options. 

What Are The Most Common Types of Spine Surgery? 

Microdiscectomy, Discectomy

One of the most commonly performed spinal procedures is a microdiscectomy or discectomy. This surgery aims to relieve pressure on the nerve roots caused by a herniated disc in your spinal column. During the minimally invasive microdiscectomy, a small portion of the damaged disc is removed through a small incision to decompress the nerves. 

Laminectomy, Laminotomy 

If you suffer from spinal stenosis, a narrowing of the spinal canal that compresses nerves, your surgeon may recommend a laminectomy or laminotomy. These procedures create more space for the spinal cord by removing portions of the lamina, the bony arch protecting the spinal canal. A laminotomy is less invasive, only removing a small part. 

Foraminotomy, Facetectomy

Procedures like foraminotomies and facetectomies enlarge the opening of the foramen where nerve roots exit the spinal column. This alleviates compression caused by bones spurs, arthritis, or herniated discs that are pinching nerves. During a foraminotomy, your surgeon will remove bone of soft tissue that is obstructing the foramen. A facetectomy involves removing part of the facet joint. 

Spinal Fusion  

For more severe spinal conditions or instability, spinal fusion surgery may be recommended to permanently connect two or more vertebrae. This immobilizes the fused section to prevent painful movement and further degeneration. Metal implants are used to hold the vertebra together as the bone grafts fuse over time. 

Disc Replacement 

An artificial disc replacement surgery removes a damaged spinal disc and replaces it with a artificial disc implant. This preserves flexibility and movement at that level compared to a fusion. Disc replacements are most commonly performed in the neck (cervical) and currently indicated for up to two levels or discs. 

How Do I Find the Right Spine Surgeon? 

When considering spine surgery it is critical to choose an experienced, reputable spine surgeon you feel comfortable with. The right surgeon will throughly answers all your questions and educates you on what to expect before, during, and after surgery. Here are a few other items to consider when selecting the right surgeon for you:

• • Experience and specialty training
  • Patient satisfaction ratings and outcomes
  • Perspective on non-surgical versus surgical treatments
  • Communication style explaining procedures and recovery

Should I See a Neurosurgeon or Orthopedic Surgeon For Spine Surgery? What is the Difference Between Each Surgeon? 

Neurosurgeons and orthopedics surgeons both perform many types of spine surgery. Spine surgery is often associated with orthopedic surgeons due to the bony spinal column. Neurosurgeons perform brain, spine, and peripheral nerve surgeries. They regularly operate on the spine and in and around the delicate structures that your spinal column protect, such as your spinal cord and nerve roots. Although both are qualified to perform spine surgery, each surgeon’s training is different:

Orthopedic surgeons are trained on the bone, muscles, and ligaments. Their medical training typically consists of all aspects of orthopedic surgery including: sports medicine, joint replacement, fractures, and spine. Their medical training consists of: 

• • Four (4) years of medical school
  • Five (5) years of residency
  • One (1) year in spine fellowship to become orthopedic spine surgeon

Neurosurgeons are trained on the brain, spinal cord, and nervous system. Their training consists of brain, spine, peripheral nerve pathology and surgical treatment. Roughly fifty (50%) of a neurosurgeon’s surgical training is spent on spine surgery, so some neurosurgeons do not pursue a fellowship. Neurosurgeons medical training consists of:

• • Four (4) years of medical school
  • Five to seven (5-7) years of residency
  • One to two (1-2) year fellowship in spine or brain surgery, typically focusing on advanced, complex, or specific surgical skill sets 

Which Type of Spine Surgeon is Right For Me? 

Surgeon training is a component of determining which spine surgeon is right for you. Some additional questions to consider when selecting your spine surgeon are: 

• • Are they board certified?
  • Did they complete a fellowship? 
  • How many spine surgeries have they done? 
  • How many spine surgeries have they done for your specific condition?
  • How much of their practice is dedicated to your specific condition? 
  • Do they educate and assist with your decision making on treatment?
  • Are they open to you seeking a second opinion?
  • Have they offered and exhausted conservative treatments? 
  • Do they put you at ease with their thoroughness and confidence? 
  • Do they have good bedside manner?
  • Has their staff been helpful and their follow up timely?

How Should I Prepare for My Upcoming Spine Surgery? 

If you have decided spine surgery is your best treatment option you most likely are experiencing mixed emotions, excited for relief but also nervous. These are completely normal emotions when preparing for spine surgery. But there are things you can do to get your body optimally ready for the surgery and set yourself up for the best recovery. The months or weeks leading up to your surgery are crucial preparation time. From specific exercises to quitting smoking, the steps you take now can make a huge difference in healing and preventing potential complications down the road. Refer to our previous blog article “Preoperative Optimization: Preparing for Spine Surgery” for detailed information to help you prepare for your upcoming spine surgery. 

At Kalra Brain & Spine in Frisco, Texas, Ricky Kalra, M.D. is a board-certified spine fellowship trained neurosurgeon who specializes in conservative management, second opinions, and minimally invasive spine surgery. Dr. Kalra is known for his bed side manner and has stated “One of the most important things we do at Karla Brain & Spine is to make sure our patients have all the information they need about their condition and treatment options so they can make an informed decision about their health care.” Dr. Kalra has been recognized as a D Best Neurosurgeon in Dallas by his physician colleagues from 2017-2023. If you have unanswered questions about a recommended spine surgery, need a second opinion, or would like to obtain the neurosurgical treatment you need call Kalra Brain & Spine at (972) 905-9226 or request an appointment on our website.

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