Whiplash and the Four Phases of Injury Potential

19 Jan

Because rear-end motor vehicle collisions are the most common cause of whiplash injury, researchers have continuously sought to better understand this unique injury process, not only to derive more effective treatment strategies, but also to implement safety mechanisms in automobiles to reduce the risk of injury in the event of a car accident. As such, investigators have identified four phases of injury potential during the rapid acceleration and deceleration of the head and neck: retraction, extension, rebound, and protraction.

  • RETRACTION PHASE: Immediately after impact, the upper torso is pushed forward by the seat back while the occupant’s head remains relatively stationary, creating head retraction similar to tucking in the chin. This produces an S-shape of the cervical spine in which the upper cervical segments flex while the lower cervical segments extend. Maximal retraction may occur at or near the point of head restraint contact (depending on headrest position). A primary injury mechanism believed to be associated with this phase is a rapid pressure spike within the spinal canal caused by the sudden differential motion between the upper and lower cervical spine.
  • EXTENSION PHASE: This phase occurs immediately after the head reaches maximum retraction, sometimes even before striking the headrest, causing the occupant’s head to extend rearward as if looking upward. This places the entire cervical spine into extension. Excessive extension can also occur when no headrest is present or when the headrest is positioned too low or too far behind the occupant’s head, contributing to a hyperextension mechanism of injury.
  • REBOUND PHASE: Here, the occupant’s head reverses direction after reaching peak extension and rebounds forward. This rebound action produces some of the highest axial and shear forces measured in whiplash testing, making the cervical spine particularly vulnerable to excessive flexion forces.
  • PROTRACTION PHASE: Injury can occur after rebound when the differential motion between the head and torso is reversed—for example, when the seatbelt and shoulder harness restrain the upper torso while the head continues its forward motion. Similar to the transition from the S-shaped curve into full extension during the retraction-to-extension phase, the cervical spine here rapidly shifts into flexion, producing another pressure spike within the spinal canal like that observed during a front-end impact.

It’s important to note that this entire process occurs within 50–80 milliseconds, roughly three to four times faster than it would take for visual input from the eyes to reach the brain and for the brain to process the information and send signals to the neck muscles to activate in an attempt to brace against injury. As such, strategies employed before a collision can help protect the head and neck from injury. Experts advise positioning the headrest so that its top is at least level with the top of the head and maintaining a distance of less than two inches (five centimeters) between the back of the head and the headrest. Studies also support keeping the seat back at an angle between 100 and 110 degrees to prevent the body from sliding upward during a collision, which can place the head higher than the headrest. Of course, always wear your seatbelt. In the event of a rear-end collision, clinical guidelines consistently identify chiropractic care as an effective conservative treatment option for reducing pain and disability.

Pain Relief Chiropractic

4909 Louise Drive Suite 102

Mechanicsburg, PA 17055

The Neck and Low Back Connection

15 Jan

When a patient seeks chiropractic care for a condition like neck pain or low back pain, it’s natural to assume the underlying cause is located in the region where the patient feels symptoms. But this isn’t always the case. Sometimes, the primary or contributing factor to the patient’s chief complaint can be elsewhere in the body. A July 2024 study involving patients with cervical myelopathy helps illustrate this point.

Cervical myelopathy is a condition in which the spinal canal narrows due to a variety of potential causes—age-related degeneration, cervical spinal stenosis, herniated disks, trauma, rheumatoid arthritis, ossification of the posterior longitudinal ligament, or even tumors, infections, or congenital narrowing—and compresses the spinal cord. While neck pain is common, irritation of the spinal cord can produce downstream effects in the areas those nerve fibers reach. In this study, which involved 786 individuals with cervical myelopathy, two-thirds also reported low back pain.

Following treatment for cervical myelopathy, about half of those with concurrent low back pain experienced meaningful improvement in both lower back pain and function, and some even reported complete resolution. This suggests that for roughly half of these patients, the issue in their neck was a major contributing factor to their low back symptoms.

Beyond cervical myelopathy itself, several soft-tissue systems span the entire spine—including fascia, long spinal muscles, and ligamentous structures—making it possible for restrictions or dysfunction in the upper spine to influence symptoms in the lower spine. The reverse is also true: issues affecting the feet, ankles, knees, hips, or low back can lead to compensatory postural changes that place additional strain on the neck as the body works to keep the eyes level.

This helps underscore the importance of evaluating the whole patient rather than narrowing attention to the immediate area of complaint—something doctors of chiropractic are trained to do. The good news is that the hands-on care chiropractors provide can often help resolve these contributing issues, and when necessary, your doctor of chiropractic will coordinate with allied healthcare providers to support the best possible outcome.

Pain Relief Chiropractic

4909 Louise Drive Suite 102

Mechanicsburg, PA 17055

Tags: , , ,

Conservative Treatment for Hip Bursitis

12 Jan

Hip bursitis most often refers to trochanteric bursitis, an inflammation of the trochanteric bursa, a small fluid-filled sac located on the outer side of the hip. The primary symptom is pain on the outside of the hip near the greater trochanter—the bony bump at the top of the femur. The pain may be sharp, dull, or throbbing and often worsens with activities that load the hip, such as walking, climbing stairs, or lying on the affected side. Other possible symptoms include swelling and tenderness around the hip, redness (less common), difficulty walking or running, and limping. What role can chiropractic play in managing this condition?

While hip bursitis can result from direct trauma, infection, or complications following hip surgery—which are red flags requiring medical or emergency evaluation—the majority of cases are musculoskeletal in nature and can be managed conservatively. Common contributors include overuse or repetitive stress (friction between the iliotibial band and the greater trochanter), biomechanical abnormalities that alter gait mechanics, prolonged pressure on the hip from poor sitting posture, lumbar spine or sacroiliac joint dysfunction, or tight/overactive musculature that increases tension on the iliotibial band and irritates the bursa. Many of these factors overlap and can work together to inflame the hip bursa.

When a patient presents for chiropractic evaluation, the chiropractor will assess for postural and biomechanical changes beginning with the feet, as excessive pronation, flat feet, knee valgus (“knocking in”), and pelvic imbalance can contribute to functional leg-length differences—one of the factors associated with hip bursitis. The exam typically includes orthopedic tests to assess hip range of motion and pain provocation patterns. Imaging such as X-ray or MRI may be ordered when needed to exclude other pathology.

Short-term management focuses on reducing inflammation through rest, activity modification, and sometimes dietary changes or supplements with anti-inflammatory properties. Applying an ice pack for 15–20 minutes or performing brief ice massage (3–4 minutes) can help reduce pain and swelling. The main treatment goal is to correct the underlying mechanical issues irritating the bursa. This may involve manual therapy to improve mobility in the hip and related joints, targeted stretching and strengthening exercises to address muscle imbalances, and even a heel lift to reduce leg-length inequality, if needed. Because hip bursitis has multiple contributing factors, the specific treatment plan is individualized for each patient. If a patient does not respond to conservative care, they may be referred to their medical physician or a specialist for further evaluation to determine whether more invasive options—such as corticosteroid or platelet-rich plasma injections, or in rare cases surgery—may be appropriate.

As with many conditions, prevention is key. Maintaining a healthy weight, following an anti-inflammatory diet, stretching the hip muscles regularly, using proper posture and movement strategies during daily activities, keeping the core strong, and staying physically active all support hip health. Periodic chiropractic checkups can also help identify biomechanical issues early—before they become painful or interfere with normal function.

Pain Relief Chiropractic

4909 Louise Drive Suite 102

Mechanicsburg, PA 17055

Tags: ,

Nocturnal Wrist Bracing for Carpal Tunnel Syndrome

8 Jan

Carpal tunnel syndrome occurs when pressure within the wrist restricts the function of the median nerve, leading to numbness, tingling, pain, and eventually weakness in the parts of the palm, thumb, index, middle and thumb-side of the ring finger. Management focuses on reducing pressure inside the carpal tunnel, which may include manual therapies, exercises, and activity modifications designed to decrease inflammation and help the tendons passing through the wrist glide more freely. In some cases, addressing hormonal or metabolic factors that contribute to inflammation, water retention, or impaired nerve health may also be necessary. One of the simplest and most effective strategies is using a wrist brace at night. But why is this so commonly recommended in clinical guidelines?

A key point is that the shape of the carpal tunnel is not fixed. The carpal bones form a concave arch, and the transverse carpal ligament forms the roof of the tunnel. When the wrist bends out of neutral alignment, the arch narrows and compresses the structures inside. These pressure increases are not subtle. A wrist positioned just 30 degrees into flexion or extension can triple pressure inside the carpal tunnel. At the extremes of flexion or extension, pressures can increase ten-fold. Even side-to-side wrist deviation can double or triple pressure on the median nerve and surrounding tendons. Not only does this directly stress the median nerve, but using the fingers while the wrist is bent causes the flexor tendons to generate heat and friction in a crowded space, which can promote inflammation and worsen symptoms.

During waking hours, we can consciously monitor our hand positions and adjust our activities to avoid these high-pressure postures. Overnight, however, this is impossible. Many patients with carpal tunnel syndrome experience sleep disturbances because their wrists naturally drift into prolonged flexion or extension while they sleep. A nocturnal wrist brace prevents this by keeping the wrist in a neutral, nerve-friendly position. Most braces look like a soft short arm cast that supports the wrist from the palm to the mid-forearm and prevents bending.

Wearing such a brace during the day would be impractical and could interfere with manual tasks—and continuous daytime bracing may even cause irritation where the ends of the brace contact the skin. For daily activity, other types of bracing and non-bracing options are more appropriate, such as ergonomic modifications for work tasks and using a soft, beanbag or memory-foam wrist support during computer use to reduce carpal tunnel pressure. However—and your chiropractor will likely emphasize this—over-reliance on bracing can hinder long-term recovery, as the muscles controlling the hand and fingers can weaken without regular use. That’s why it’s important to pair nighttime bracing with prescribed wrist exercises, frequent breaks, avoidance of extreme wrist postures, and healthy lifestyle habits that reduce systemic inflammation.

Pain Relief Chiropractic

4909 Louise Drive Suite 102

Mechanicsburg, PA, 17055

Tags: , ,

The Evidence Map of Low Back Pain Treatment Options

5 Jan

Low back pain is extremely common and remains one of the leading causes of disability worldwide, resulting in substantial healthcare utilization and cost. Because of this broad impact, identifying and implementing effective, safe, and cost-efficient strategies to diagnose, manage, and prevent low back pain is essential to improve patient outcomes and reduce overall healthcare burden. In 2022, researchers conducted a comprehensive analysis of the available evidence for ten commonly recommended treatments for low back pain—five medication-based and five non-medication-based—drawn from multiple clinical practice guidelines:

  • Nonsteroidal anti-inflammatory drugs (NSAIDs) work by blocking the COX-1 and COX-2 enzymes responsible for producing prostaglandins, which influence pain sensitivity, inflammation, fever, and tissue blood flow. Evidence supports short-term improvements in pain and disability, but use is limited by potential side effects such as stomach irritation, increased bleeding risk, kidney strain, and caution in patients with certain heart conditions.
  • Acetaminophen (paracetamol) also blocks prostaglandin production, but its effects are largely restricted to the central nervous system. Importantly, available evidence shows little to no meaningful benefit for pain, function, or quality of life in patients with low back pain.
  • Opioids blunt incoming pain signals and alter how the brain interprets pain. Due to risks of misuse, dependence, and overdose, guidelines recommend restricting their use to severe acute pain or postoperative situations and strongly discourage long-term use.
  • Muscle relaxants can reduce muscle spasm through several central mechanisms. Evidence supports short-term symptom relief, but high-quality evidence is limited, and side effects—including drowsiness, dizziness, cognitive slowing, dry mouth, low blood pressure, nausea, drug interactions, and dependence—must be carefully considered.
  • Antibiotics are intended to treat infection. Evidence supporting their role in low back pain management is weak, inconsistent, and not broadly applicable.
  • Psychological or behavioral therapies can be especially valuable for patients with persistent or recurrent low back pain, as psychological factors strongly influence whether patients engage in behaviors that support or hinder recovery.
  • Staying active and avoiding bed rest are strongly recommended. Activity helps maintain function, reduce disability, and speed recovery.
  • Reassurance—emphasizing that low back pain is common, manageable, and rarely dangerous—reduces fear and catastrophizing and lowers the risk of progression to chronic pain.
  • Exercise, including both general physical activity and targeted movement strategies, provides modest but meaningful improvements in pain and disability. Exercise also reduces recurrence risk.
  • Manual therapy, which includes manipulation and mobilization, helps restore normal movement to the spine and associated tissues, reducing pain and disability. Practitioners often combine different manual techniques based on examination findings, patient preference, and clinical training and experience.

The great news is that doctors of chiropractic frequently employ a multimodal treatment approach that includes manual therapy, exercise, reassurance, and activity recommendations—among the most strongly supported options in this evidence map!

Pain Relief Chiropractic

4909 Louise Drive Suite 102

Mechanicsburg, PA 17055

Tags: , , ,

Sleep Is Essential for Good Health

22 Dec

Sleep is a fundamental biological necessity that supports vital processes such as brain waste
clearance, immune regulation, and nutrient metabolism. While the body can recover from an occasional
night of poor rest, frequent sleep disruption can set the stage for chronic disease. Experts estimate that
about ten percent of adults meet the criteria for insomnia, while another twenty percent experience
occasional insomnia symptoms, highlighting just how widespread sleep problems are.
There are three key ingredients for healthy sleep: quantity, quality, and consistency. Adults
generally need seven to nine hours of rest each night, with the required amount gradually decreasing with
age. If you find yourself sleeping in on weekends or relying on naps to catch up, that’s a clear sign you’re
not getting enough sleep during the week. But the number of hours alone doesn’t tell the whole story. The
body cycles through several stages of sleep—from light to deep to rapid eye movement—and waking
repeatedly during the night can interrupt these cycles, leaving you feeling tired even after spending
sufficient time in bed. Equally important is maintaining a regular sleep schedule. Going to bed and
waking up at the same time each day, even on weekends, helps regulate the body’s circadian rhythm, the
internal clock that governs hormone release, body temperature, and alertness. When this rhythm is stable,
it becomes easier to fall asleep, stay asleep, and wake feeling refreshed.
And no, that morning cup of coffee can’t make up for poor sleep. In fact, an analysis of data
concerning more than 88,000 adults in the UK Biobank study found that inadequate or irregular sleep is
associated with 172 diseases, including dementia, Parkinson’s disease, and diabetes. For 42 of these
conditions—among them liver cirrhosis, fibrosis, and age-related frailty—poor sleep more than doubles
disease risk. Remarkably, the researchers estimate that insufficient or irregular sleep accounts for roughly
20% of the overall risk profile in 92 of these conditions, suggesting that sleep regularity may play an even
greater role in long-term health than sleep duration alone.
To set the stage for better sleep, experts emphasize lifestyle and environmental factors that
support the body’s natural rhythms. A nutrient-rich diet, regular physical activity, limited alcohol and
caffeine intake, and effective stress management all contribute to more restful sleep. Exposure to natural
light during the day and minimizing blue light from screens in the evening help reinforce the body’s
natural light–dark cycle. Keeping the bedroom dark, quiet, and cool promotes deeper rest, while
maintaining a consistent bedtime strengthens the brain’s expectation of when to release sleep-related
hormones. If snoring, gasping, or frequent awakenings are a problem, a sleep specialist can evaluate for
conditions such as sleep apnea.
Finally, when pain interferes with sleep, addressing the source is essential. Research shows a
bidirectional relationship between poor sleep and musculoskeletal pain—particularly low back pain—
meaning that inadequate rest can worsen discomfort, and discomfort can further erode sleep quality. In
such cases, consulting a doctor of chiropractic can be an important step toward breaking this cycle and
restoring both comfort and healthy sleep.
Pain Relief Chiropractic

4909 Louise Dr. Suite 102 Mechanicsburg, PA 17055 (717) 697-1888

Tags: ,

← Older Entries
Newer Entries →