Plain-Language Walkthrough of I-10 Force Vectors and Why Pre-Existing Findings Do Not Defeat Causation
Abstract
High-speed corridors such as Interstate 10 and Loop 375 in El Paso generate distinctive force vectors during collisions. Rapid changes in velocity (delta-V), principal force directions, and occupant kinematics transfer energy into the spine and soft tissues. This module explains those mechanics in plain language, shows how objective range-of-motion and alteration-of-motion-segment-integrity findings document traumatic aggravation under the eggshell rule, and demonstrates why pre-existing degenerative changes do not defeat causation when the dual-licensure team isolates new, crash-related injury. Patients and attorneys receive the same clear summary that supports non-invasive recovery pathways and AMA Guides impairment ratings.
Picture a typical weekday morning on I-10 east of El Paso. Traffic is moving at highway speeds when a sudden stop or side impact occurs near an interchange with Loop 375. The vehicle slows abruptly. The occupant’s body continues forward or sideways for a fraction of a second until the seatbelt, airbag, or interior structures stop it. That brief mismatch between the vehicle’s change in velocity and the body’s inertia is the force vector that starts the injury process.
Understanding these vectors does not require an engineering degree. It requires a clear timeline: the crash mechanism, the direction the body moves, the tissues that absorb the energy, and the objective findings that appear afterward. When defense counsel points to “pre-existing” arthritis or disc degeneration on imaging, the same plain-language account shows why those findings do not erase the new traumatic aggravation. This accessible breakdown points readers to the full medical-legal causation framework in personal injury at https://dralexjimenez.com.
How Force Vectors Work on El Paso Highways
Force equals mass times acceleration. On I-10 and Loop 375, vehicles often travel at speeds that produce delta-V values high enough to load the cervical and lumbar spine beyond normal tissue tolerance. In a rear-impact or frontal collision, the primary vector is longitudinal. The seat pushes the pelvis and torso first; the head lags, creating an S-shaped cervical curve before rebound (Viano & Parenteau, 2023). In side impacts common at Loop 375 interchanges, the lateral vector produces translation and rotation that stress facet joints, ligaments, and nerve roots.
Occupant kinematics follow the initial force vector. A right-side impact moves the body toward the struck side first, then rebounds, which can strain the opposite side. Even modest delta-V can generate peak head accelerations roughly twice the vehicle’s change in velocity during the brief contact phase. These loads stretch or shear annular fibers, capsular ligaments, and surrounding soft tissues. The result is a measurable loss of normal motion segment integrity and restricted range of motion, which can be documented on clinical examination and flexion-extension radiographs.
Attorneys can share this explanation with clients because it stays accurate without technical jargon. Patients understand that the same physics that crumpled the bumper also loaded their spine. Defense arguments that “the property damage was minor” do not address the short-duration, high-acceleration pulses that tissues experience.
Isolating Traumatic Aggravation Under the Eggshell Rule
Texas law applies the eggshell plaintiff doctrine through Pattern Jury Charges. The defendant takes the plaintiff as found. If a crash aggravates a pre-existing degenerative disc or arthritic joint, the responsible party is accountable for the worsening, not merely for the injury a perfectly healthy person would have sustained (Texas Pattern Jury Charges, 2024). PJC instructions direct juries to award damages for the aggravation itself.
The dual-licensure model at Injury Medical Clinic PA isolates that aggravation with clinical and imaging evidence. Dr. Alex Jimenez, DC, APRN, FNP-BC, CFMP, IFMCP (Texas License #1191402, Prescriptive Authority #59628, NPI: 1205907805) combines chiropractic biomechanical analysis with advanced-practice nursing authority to order and interpret diagnostic studies. The team, including Dr. Maria Guadalupe Cardenas, MD (Texas License #J2933, NPI: 1164426748), reviews prior records, current symptoms, and new objective findings.
Key documentation includes:
- Immediate or early post-crash symptom onset with no matching prior complaints in the electronic medical record.
- Restricted active and passive range of motion that exceeds age-expected norms and matches the direction of the force vector.
- Alteration of motion segment integrity on flexion-extension radiographs meeting AMA Guides thresholds for translation or angular motion (American Medical Association, 2024).
- MRI sequences (T2 and STIR) showing edema, high-intensity zones, or ligamentous signal changes consistent with acute loading rather than long-standing degeneration.
These findings support both clinical causation and proximate causation. The mechanics of the I-10 or Loop 375 crash (rapid deceleration, blunt impact, or lateral force) produce the documented soft-tissue and segmental injuries. Pre-existing osteophytes or disc desiccation may be present, yet new translation, angular instability, or inflammatory signal on advanced imaging demonstrates the traumatic contribution.
Objective ROM and AOMSI Findings That Support AMA Guides Ratings
Range-of-motion losses and changes in motion-segment integrity provide measurable anchors for impairment ratings. Under the AMA Guides, sixth edition, diagnosis-based impairment tables for the cervical and lumbar spine incorporate specific individual elements from history, physical examination, and clinical studies. AOMSI criteria address translation (for example, greater than defined millimeter or percentage thresholds) and angular motion differences between adjacent segments. When these criteria are met on technically adequate flexion-extension views obtained at maximum medical improvement, they contribute to the impairment class and grade.
Dr. Jimenez’s dual scope lets the same clinician perform the orthopedic and neurological exam, order imaging, and generate Colossus-compliant notes that withstand scrutiny. Functional testing quantifies how restricted motion affects daily activities. The resulting permanent impairment percentages support future-care projections for ongoing non-invasive management rather than assuming every patient requires surgery.
Patients gain clear language they can repeat: “The crash moved my spine beyond its normal limits in the direction of the impact. Measurements show the segments no longer hold their normal relationship, and that change is new.” Attorneys receive the same narrative backed by the identical objective data.
Bioethical Integration: Beneficence, Non-Maleficence, and Autonomy
Beneficence guides the team to combine chiropractic adjustments that restore segmental motion, neurofunctional acupuncture and electroacupuncture that modulate pain pathways and support nervous-system recovery, and functional-medicine laboratory panels ordered under the nurse-practitioner license to address metabolic factors that slow healing. The goal is root-cause resolution so patients regain mobility, sleep better, and reduce pain without unnecessary procedures.
Non-maleficence favors these non-invasive, drug-free options. Electroacupuncture and precise chiropractic care lower the risks associated with long-term opioid use or premature surgical intervention. Patients avoid the complications of heavy medication dependency while still receiving advanced therapies such as MLS laser, shockwave, or regenerative orthobiologics when clinically indicated and coordinated with Dr. Cardenas.
Autonomy positions the patient as the informed decision-maker. The patient receives the same plain-language summary the attorney shares. Education explains how the force vector caused the injury, why pre-existing findings do not defeat the claim, and how the coordinated MD/NP/DC team works with existing medical providers. Patients retain control over treatment choices while the clinic supplies the objective documentation needed for Letters of Protection and settlement discussions.
Practical Documentation That Holds Up
Digital diagnostic imaging, serial range-of-motion measurements, and functional outcome scores create a contemporaneous record. Electronic notes capture the mechanism, vector analysis, objective findings, and response to care in language that insurance systems and defense experts can evaluate. This documentation supports both the clinical necessity of continued non-invasive treatment and the legal proof of traumatic aggravation.
Patients leave with an understandable account of what happened on I-10 or Loop 375 and why their pre-existing changes do not erase the new injury. Attorneys receive shareable language that remains accurate when defense counsel questions the narrative. The multidisciplinary team—led by Dr. Jimenez’s dual licensure and Dr. Cardenas’s medical direction—supplies the objective bridge between biomechanics and lasting recovery.
References
American Medical Association. (2024). AMA Guides to the evaluation of permanent impairment (6th ed., 2024 update). American Medical Association. https://ama-guides.ama-assn.org
Texas Pattern Jury Charges. (2024). Texas pattern jury charges—General negligence, intentional personal torts & workers’ compensation (2024 ed.). Texas Bar Practice. https://www.texasbarpractice.com
Viano, D. C., & Parenteau, C. S. (2023). Injury by delta V in front, near-side, far-side, and rear impacts: Analysis of 1994-2015 NASS-CDS. SAE International Journal of Advances and Current Practices in Mobility, 5(2), 485–497. https://doi.org/10.4271/2022-01-0835
Additional sources that underpinned the force-vector, eggshell-rule, and AOMSI discussion in Module 1 (and that will be expanded in later modules) include:
Armstrong Lee & Baker. (2026). Eggshell plaintiff doctrine: Cases & pre-existing conditions. https://albtriallawyers.com/blog/eggshell-plaintiff-doctrine-texas/
Jimenez, A. (n.d.). Advanced spinal MRI interpretation and medico-legal expertise. Injury Medical Clinic PA. https://dralexjimenez.com/why-attorneys-use-dr-alex-jimenez-dc-fnp-expert-witness/
Luers, P. R. (2019). Spinal alteration of motion segment integrity using the sixth edition. AMA Guides Newsletter, 24(3), 10–13. https://doi.org/10.1001/amaguidesnewsletters.2019.MayJun02
The information herein is not intended to replace a one-on-one relationship with a qualified healthcare professional or licensed physician and is not medical advice. We encourage you to make healthcare decisions based on your research and partnership with a qualified healthcare professional. Our information scope is limited to chiropractic, musculoskeletal, and physical medicine, as well as wellness, sensitive health issues, and functional medicine articles, topics, and discussions. We provide and facilitate clinical collaboration with specialists across disciplines. Each specialist follows their professional scope of practice and the jurisdiction in which they are licensed. We utilize functional health and wellness protocols to treat and support care for musculoskeletal injuries or disorders. Our videos, posts, topics, subjects, and insights cover clinical matters and issues that directly or indirectly support our clinical scope of practice. Our office has made a reasonable effort to provide supportive citations and identify relevant research studies for our posts. We provide copies of supporting research studies to regulatory boards and the public upon request.
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Dr. Alex Jimenez, DC, MSACP, APRN, FNP-BC*, CCST, IFMCP, CFMP, ATN
Email: coach@elpasofunctionalmedicine.com
Multidisciplinary Licensing & Board Certifications:
Licensed as a Doctor of Chiropractic (DC) in Texas & New Mexico*
Texas DC License #: TX5807, Verified: TX5807
New Mexico DC License #: NM-DC2182, Verified: NM-DC2182
Multi-State Advanced Practice Registered Nurse (APRN*) in Texas & Multi-States
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Texas APRN License #: 1191402, Verified: 1191402 *
Florida APRN License #: 11043890, Verified: APRN11043890 *
New York APRN License #: N25929, Verified: APRN-N25929*
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Compact Status: Multi-State License: Authorized to Practice in 40 States*
Graduate with Honors: ICHS: MSN-FNP (Family Nurse Practitioner Program)
Degree Granted. Master's in Family Practice MSN Diploma (Cum Laude)
Dr. Alex Jimenez, DC, APRN, FNP-BC*, CFMP, IFMCP, ATN, CCST
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Dr. Maria Cardenas, MD
(Board Certified in Internal Medicine)
Medical Director & Collaborative Physician
NPI # 1164426748
MD License #: J2933
Dr. Maria Cardenas, MD
(Board Certified in Internal Medicine)
Medical Director & Collaborative Physician
NPI # 1164426748
MD License #: J2933
