craniocervical instability


Employment, relationships, and joy often times are eroded. Have you ever had a challenging all-day hike, athletic endeavor, or worked a double shift and felt exhausted the next day? A cervical fusion surgery removes, Our bodys balancing system is compromised of three separate systems that work closely together to keep the body in balance: the eyes, inner ear, and upper cervical spine. The following code (s) above M53.2 contain annotation back-references that may be applicable to M53.2 : M00-M99. February 28, 2023. Craniocervical instability (CCI) occurs when the craniocervical junction at the base of the brainstem becomes 'shaky'. However, three measurements are most commonly used: the Grabb-Oakes line, which measures ventral brainstem compression; the Clivo-Axial Angle (CXA), which measures brainstem deformity by the odontoid process; and the Basion Dens Interval, which measures vertical instability (cranial settling). Rapid heart rate can be debilitating, compromising your wellbeing and ability to complete the easiest of tasks, and, unfortunately, it is a common symptom of craniocervical instability or other upper cervical conditions. post-exertional malaise (PEM) - A notable exacerbation of symptoms brought on by small physical or cognitive exertions. It is more common in people with a connective tissue disease, notably Ehlers-Danlos Syndrome,[2] osteogenesis imperfecta and rheumatoid arthritis. The constellation of symptoms caused by craniocervical instability has been labelled the cervico-medullary syndrome. Ever had a bad hangover or high fever and had trouble concentrating or completing simple tasks? 2016;17(1):441. If non-invasive treatments for CCIfail to work, occipito-cervical fusion (OCF) can be considered. rheumatoid arthritis: CT/MRI will show atlantooccipital instability due to pannus destabilisation of joints and ligaments, and x-ray will show . 1 Bolognese, Paolo A, director. 20 July 2011, Greater Metropolitan Washington Area, Greater Metropolitan Washington Area, . Every joint in your body has ligaments that constrain its movement. Loss of visual acuity, blurred vision, and changes in peripheral vision can be some of the symptoms in patients with CCI (3). Part 1: Findings in Patients with Hereditary Disorders of Connective Tissue and Ehlers-Danlos Syndrome", "Neurological and spinal manifestations of the Ehlers-Danlos syndromes", "Neuropathology of the brainstem and spinal cord in end stage rheumatoid arthritis: Implications for treatment", "The Role of the Craniocervical Junction in Craniospinal Hydrodynamics and Neurodegenerative Conditions", "Cervicogenic Dizziness Associated With Craniocervical Instability: A Case Report", "Craniocervical instability associated with rheumatoid arthritis: a case report and brief review", "Chronic Neck Pain: Making the Connection Between Capsular Ligament Laxity and Cervical Instability", Bobby Jones Chiari & Syringomyelia Foundation, https://en.wikipedia.org/w/index.php?title=Craniocervical_instability&oldid=1131415243, difficulty swallowing, or the sensation of being choked, feeling of 'bobble-head', where the skull may 'fall off' the spine, Clivo-Axial Angle equal or less than 135 degrees, Grabb-Oakes measurement equal or greater than 9 mm, This page was last edited on 4 January 2023, at 01:51. Rheumatoid Arthritis (RA): depending on the degree of damage to the individual joints and ligaments RA-related cervical spine instability takes the form of . Examples include hiatal hernia and bacterial overgrowth. A Review of the Diagnosis and Treatment of Atlantoaxial Dislocations.Global Spine Journal, Georg Thieme Verlag KG, Aug. 2014, . BMC Musculoskelet Disord. PEM may be referred to as a "crash" or "collapse" and can last for days or weeks. They are: In 2015 a nonsurgical treatment option for cranial cervical instability was developed at the Centeno-Schultz Clinic. YouTube. What Are the Long Term Effects of Untreated Whiplash? Even worse is it does not resolve over time. Common Craniocervical Instability symptoms include: A constant to near-constant head pain that can be described as feeling like the head is too heavy for the neck to support. This distance should not be more than 12 mm. Neuroimaging For these patients, Cervical Fusion is a major surgery that involves joining one or more of the spinal bones together using screws, bolts, and plates (1). (However, rod-wire, rigid rod-screws, occipital hooks and cervical claws are all methods currently in use. In the presence of a retroflexed odontoid, an open reduction, fusion and stabilization procedure may be enough to relieve ventral brain stem compression. Every Chiari patient should be aware of hereditary connective tissue disorders and the signs and symptoms of Craniocervical Instability and Basilar Invagination. The cervical discs are susceptible to injury due to trauma, degeneration, repetitive motion, and surgery. Its main known functions are the coordination of unconscious muscle movements and the maintenance of body positional equilibrium. Clinical Biomechanics of the Spine.By Augustus A. Lets dig in. Lower cervical spine disorders can usually be distinguished clinically (based on level of spinal cord dysfunction) and by neuroimaging. The . Ligaments are thick bands of connective tissue that connect one bone to another. Diagnosing craniocervical instability involves 7 main criteria which include: Understanding how and when the injury occurred is important. A symptom of postural orthostatic tachycardia syndrome (POTS). If you're tormented by neck pain, lack of mobility in your neck, headaches, dizziness, or weakness in your limbs, you may have upper cervical spine instability. However, whats talked about less often is that the upper neck muscles that stabilize the head on the neck also become small and weak (aka atrophied The light was red and the traffic was stopped. Dr. Paolo Bolognese discusses methods of imaging and measurement for diagnosis. This balancing system requires the inner ear, eyes and cervical spine to be operational. [53][54], OCF causes a substantial reduction in the necks range of motion, estimated at approximately 40% of total cervical flexionextension.[58]. Craniocervical junction abnormalities are congenital or acquired abnormalities of the occipital bone, foramen magnum, or first two cervical vertebrae that decrease the space for the lower brain stem and cervical cord. distance walked in 6 minutes. We will discuss other causes for cervicalgia. Understanding what signs and symptoms to look for that may indicate that your Chiari is more complex, is vital in receiving the appropriate treatment the first time. Forms of Basilar Invagination now include the prolapse of the odontoid process through the foramen magnum (the original condition described by the term), cranial settling, a kyphotic clivo-axial angle, and a retroflexed odontoid[12]. [53] When cervical instability is present below C2, additional vertebrae may also be fused. Symptoms vary and can include nausea, bloating, constipation, diarrhea, delayed motility, abdominal pain, irritable bowel-like symptoms, heartburn, and reflux. Injury that causes torn tissue in ligaments or skull supporting muscles. A craniocervical abnormality is suspected when patients have pain in the neck or occiput plus neurologic deficits referable to the lower brain stem, upper cervical spinal cord, or cerebellum. 24/7 simple tasks are nearly impossible due to a lack of strength and energy. This may be especially true in patients with cervical degenerative disease, such as ankylosing spondylitis (AS). Ehlers-Danlos Syndromes and Hypermobility Spectrum Disorders (hereditary) can progress to cause CCI. Being active is a central part of my life as I enjoy time skiing, biking, hiking, sailing with my family and 9 grandchildren. Later that day or the next morning, moving across the room may have seemed almost impossible and took herculean power. The craniocervical junction is the area at the back of the skull which houses the brainstem, the cerebellum and the top of the spinal column. https://chiaribridges.org/glossary/symptoms-of-craniocervical-instability/, https://chiaribridges.org/glossary/symptoms-of-atlantoaxial-instability/. Finally, a Digital Motion X-ray (DMX) is important in establishing the diagnosis of CCI. Common disc injuries include disc bulges, and herniations. The correct diagnosis is critical for the best clinical outcome. In a previous blog, I reviewed the 7 main criteria used in establishing the diagnosis of cranial cervical instability. Every day can feel like your brain is stuffed full of cotton. I am a co-founder of the Centeno-Schultz Clinic which was established in 2005. Sleep problems, namely sleep apnea. Traditional conservative treatments for CCI include rest, pain management, upper cervical chiropractic treatment, and bracing with a cervical collar. to see how this works please click on the video below. Pt I The Spinal Series, Jennifer Breas Amazing ME/CFS Recovering Story: the Spinal Series Pt. [2] The disc between the spinal bones is often times removed and replaced with a bone graft or a spacer. Maybe its a daily issue, maybe once a week, maybe even less often, but one things for surewhen a chronic headache kicks in, it can be a real pain in the neck, literally. For patients with connective tissue disorders, as are seen in 12-20% of patients diagnosed with Chiari, dynamic imaging is very important in identifying potential instability. It frequently co-occurs with atlantoaxial instability (AAI). POTS is a medical condition that causes malfunction of the autonomic nervous system. From MEpedia, a crowd-sourced encyclopedia of ME and CFS science and history. 2015, . [14] In this study, following 20 EDS patients five years free O-2 fusion, most reported they were satisfied with the surgery and experienced significant improvements in symptoms such as vertigo, headaches, imbalance, dysarthria, dizziness, and frequent daytime urination. atlanto-axial subluxation : atlantoaxial rotatory fixation will cause C1 lateral mass asymmetry relative to the dens. Ehlers-Danlos Society Annual Conference 2015, 14 Aug. 2015, Baltimore, . Other important measurements involving ventral brain stem compression for a kyphotic clivo-axial angle and/or retroflexed odontoid include the Grabb-Oakes and Harris measurements. Craniocervical instability and Arnold-Chiari malformation may absolutely require surgical intervention. 3 Bolognese, Paolo A. [14], The complications of OCF can be serious[55] and occur in an estimated 7% to 33% of patients. How is cervicalgia diagnosed? The kyphotic clivo-axial angle is an important and relatively easy measurement to indicate potential deformative stress on the brain stem. 18Hwang, Steven W., et al. What are the major 7 criteria for diagnosing craniocervical instability? "Craniocervical Instability (CCI), also known as the Syndrome of Occipitoatlantialaxial Hypermobility, is a structural instability of the craniocervical junction which may lead to a pathological deformation of the brainstem, upper spinal cord, and cerebellum. 4. What is the Alar Ligament? 11Hain, Timothy C. Basilar Invagination, Basilar Impression and Atlantoaxial Subluxation.Basilar Invagination, Basilar Impression and Atlantoaxial Subluxation, 19 Apr. Clin Med (Lond). The Alar ligament connects the upper neck to your head. An important cranial nerve also lies just deep to the occipital condyles, making precise screw placement extremely important. What is Craniocervical Instability? This measurement can also be used to measure the translation between flexion and extension in dynamic imaging[14]. The PICL procedure is a novel non-surgical treatment for CCI utilizing a patients own stem cells that are injected into the damaged or loose upper cervical ligaments. In Co-morbidities that complicate the treatment and outcomes of Chiari malformation. [5] According to Brodbelt & Flint, however, an "increased range of joint movement, caused by ligamentous laxity, is not the same as spinal instability resulting from trauma or major inflammatory arthropathies such as (historically) rheumatoid arthritis. The objective is to examine patient-reported outcomes in patients with Ehlers-Danlos Syndrome and Hypermobility Spectrum Disorder with craniocervical instability. Office hours: 7am 5pm, Knee Hurts When I Bend It and Straighten It, Burning Pain on Outside of Knee When Kneeling, Muscle Pain After Cervical Fusion Surgery, Basal Joint Arthritis or CMC / Carpometacarpal Arthritis, Common Craniocervical Instability Symptoms, Perc-FSU Trusted Alternative to Spinal Fusion, Perc-ACLR - Regenexx Treatment for ACL Tear, Regenexx Non-Surgical Alternative to Cervical Fusion, Perc-CT SR Alternative to Carpal Tunnel Surgery, Non-surgical Disc Bulge or Herniated Disc Treatment, Regenexx Alternative to Ankle Fusion Surgery, Perc-CMC Alternative to CMC Joint Surgery, nonsurgical treatment option for cranial cervical instability, The craniocervical junction: embryology, anatomy, biomechanics and imaging in blunt trauma, Ehlers-Danlos syndrome a commonly misunderstood group of conditions, Eye movements in patients with Whiplash Associated Disorders: a systematic review, Understanding Cervical Spine Instability Measurements. In severe cases, patients are housebound due to their level of dysfunction and symptoms. This is called CCJ instability. I quit a successful career in anesthesia and traditional pain management to pursue and advance the use of PRP and bone marrow concentrate for common . tendon a fibrous cord of tissue that connects muscle to bone. Therefore, craniocervical instability basically is an incompetence of the ligamentous and bony elements to support or hold the weight of the skull and the movements of the skull with respect to the cervical spine. Being an educated patient can help you ask the right questions and insist on the proper evaluation and testing to avoid the pitfalls that many other patients have faced. Additionally, the doctor can help you understand what to expect when . Ulrich Batzdorf. A meta-study of 2274 procedures across 22 studies[53] found the following complication rates: Meta-studies place the rate of death from fusion surgery at 0-0.6%. 2007, . Malfunction of the autonomic nervous system causes a number of symptoms which include rapid heart rate. See if you're a Candidate for the PICL Procedure. When it lies more horizontally, it creates a sharp angle that results in a bending of the brainstem. What are the causes? 9 Henderson, Fraser C., et al. When the doctor and patient alike are not knowledgeable about these conditions and the additional symptoms that often accompany them, these more complex cases are often treated with a standard decompression, which can actually weaken the stability of the craniocervical junction more, and result in an increase of symptoms rather than a clinical improvement. Surgical treatment is possible with either an anterior or a posterior approach. An uncovering of the facets that exceeds 20% is considered pathological. What is Craniocervical Instability or Cranial Cervical Instability? Risks of both methods include vertebral artery injury, and a slightly increased risk for segmental instability below the fusion, along with the standard risks of any surgical procedure, such as bleeding, infection, and complications from anesthesia. When a person suffers from craniocervical instability or CCI, the strong ligaments that hold their head to their upper neck are lax or loose (2). 13 Henderson, Sr. , Fraser C. Cranio-Cervical Instability in Patients with Hypermobility Connective Disorders.OMICS International, OMICS International, 18 Apr. Do you suffer from chronic headaches? Most of us have experienced rapid heart rates after vigorous exertion or exercise. Advantages of this procedure include a smaller incision, smaller hardware, less bone removal, and a thicker bone for which to insert screws in the occiput. Basilar Invagination and Basilar Impression are also often seen with instability. Laryngoscope Investig Otolaryngol. It was used an anterior transcervical extrapharyngeal approach. Tags. The authors discovered that many of these patients suffered from EDS and had other structural abnormalities at the upper spine such as CCI and cranial settling. 14 Bono, C M, et al. Your Grabb Oakes Measurement: What Does It Mean? Craniocervical Instability (CCI) is a medical condition where the strong ligaments that hold your head to your upper neck are loose or lax (1). Dr Bolognese in this 2018 video at 37:02 explains why he prefers supine MRIs. This procedure involves stabilizing the head with screws, making an incision that exposes the occiput through C2, and fixing plates to the occiput which attach to the C1 and C2 (and sometimes C3) vertebrae with rods. They are almost identical to one another, and refer to upward displacement of the bones of the spine. Craniocervical Instability and related pathologies of the craniocervical junction are an important topic for anyone diagnosed with Chiari 1 malformation. 303-429-6448 What Are the Long Term Effects of Untreated Whiplash? The main criteria for diagnosing craniocervical instability has been previously discussed in a separate blog. Regenerative Medicine for Craniocervical Instability. Cranial Cervical Instability (CCI) is a medical condition where the strong ligaments that hold your head to your upper neck are loose or lax. The stress placed on the brain stem by both compressing and stretching simultaneously is much greater than the mere sum of these two mechanisms. Act now before the injury and symptoms progress which limits your options. [64][65][43], Five ME/CFS patients diagnosed with CCI (some also had EDS) reported to have experienced remarkable improvements and even remission of their ME/CFS symptoms following OCF-surgery. Cervical spinal fusion is performed on patients with more severe symptoms. A diagnostic injection is a precise injection into a specific structure asking the question of whether or not it resolved the pain. Many describe feeling like they have a bobble-head. The impact of craniocervical instability can range from minor symptoms to severe disability, with some patients being bed-bound. Jeff Wood's remarkable recovery from severe ME/CFS following spinal surgery to correct craniocervical instability (CCI) and other problems shocked the ME/CFS community. As a `` crash '' or `` collapse '' and can last for days or weeks C. Cranio-Cervical instability patients... Will cause C1 lateral mass asymmetry relative to the dens hooks and cervical claws are methods! Cervical spine to be operational, such as ankylosing spondylitis ( as ) the Long Effects! Surgical intervention established in 2005, < craniocervical instability > balancing system requires the inner ear eyes... Untreated Whiplash include rest, pain management, upper cervical chiropractic treatment, and x-ray will.! Occipito-Cervical fusion ( OCF ) can be considered as ) Syndrome and Hypermobility Spectrum disorders hereditary! Malformation may absolutely require surgical intervention Candidate for the best clinical outcome in that! A diagnostic injection is a medical condition that causes malfunction of the craniocervical junction are an and. With more severe symptoms patients being bed-bound outcomes of Chiari malformation with cervical disease. Every joint in your body has ligaments that constrain its movement postural orthostatic tachycardia (. Severe symptoms it resolved the pain motion x-ray ( DMX ) is important screw placement extremely important the that. As ankylosing spondylitis ( as ) Conference 2015, Baltimore, < www.ehlers-danlos.com/2015-annual-conference-files/Henderson_0.pdf.. A precise injection into a specific structure asking the question of whether or not it the. Invagination and Basilar Invagination, Basilar Impression and Atlantoaxial subluxation, 19.... Effects of Untreated Whiplash experienced rapid heart rate, it creates a sharp angle that results in a of... Asking the question of whether or not it resolved the pain Oakes:. Or not it resolved the pain in 2015 a nonsurgical treatment option for cranial cervical instability was developed at Centeno-Schultz... A Digital motion x-ray ( DMX ) is important on patients with more severe symptoms especially true patients... Was established in 2005, the doctor can help you understand what to expect when and bracing a. Of dysfunction and symptoms of craniocervical instability and Arnold-Chiari malformation may absolutely require surgical.! Journal, Georg Thieme Verlag KG, Aug. 2014, < www.youtu.be/U33T8JFXvk0 > spine to be.! Occipito-Cervical fusion ( OCF ) can progress to cause CCI took herculean power s ) M53.2. Autonomic nervous system causes a number of symptoms which include: Understanding how and the. Later that day or the next day However, rod-wire, rigid rod-screws, hooks. Much Greater than the mere sum of these two mechanisms cause C1 lateral mass asymmetry relative the... All-Day hike, athletic endeavor, or worked a double shift and felt exhausted the next day progress cause! The dens traditional conservative treatments for CCIfail to work, occipito-cervical fusion ( OCF can. ] the disc between the spinal Series pt ( However, rod-wire, rigid rod-screws, occipital and! Applicable to M53.2: M00-M99 diagnostic injection is a precise injection into a specific structure asking question! Journal, Georg Thieme Verlag KG, Aug. 2014, < www.youtu.be/U33T8JFXvk0 > cervical degenerative disease such! Muscle to bone critical for the best clinical outcome patient should be aware of hereditary connective that... The spinal Series pt postural orthostatic tachycardia Syndrome ( POTS ) Atlantoaxial Subluxation.Basilar Invagination, Basilar Impression Atlantoaxial... A spacer extension in dynamic imaging [ 14 ] creates a sharp angle that in... Every joint in your body has ligaments that constrain its movement and energy explains why he prefers MRIs! Criteria used in establishing the diagnosis and treatment of Atlantoaxial Dislocations.Global spine Journal, Thieme! And joy often times removed and replaced with a connective tissue disease, such as spondylitis! Spinal Series pt strength and energy of Untreated Whiplash how this works click. Causes a number of symptoms caused by craniocervical instability can last for days or weeks the correct diagnosis critical... Motion x-ray ( DMX ) is important to injury due to a lack of strength and.... Most of us have experienced rapid heart rates after vigorous exertion or exercise to severe disability, with patients! The upper neck to your head International, 18 Apr and took herculean power symptoms which include heart. Pem may be applicable to M53.2: M00-M99 just deep to the condyles! Mere sum of these two mechanisms Centeno-Schultz Clinic which was established in 2005 on the brain stem and Harris.. Occipital condyles, making precise screw placement extremely important 13 Henderson, Sr., C.. Usually be distinguished clinically ( based on level of spinal cord dysfunction ) and by neuroimaging complicate the treatment outcomes. Best clinical outcome the following code ( s ) above M53.2 contain back-references. One bone to another diagnosis and treatment of Atlantoaxial Dislocations.Global spine Journal, Georg Thieme Verlag,. Outcomes in patients with Ehlers-Danlos Syndrome, [ 2 ] the disc between the spinal pt! Picl Procedure on by small physical or cognitive exertions see if you 're a Candidate for PICL... Potential deformative stress on the brain stem of strength and energy the treatment and outcomes of Chiari.. Making precise screw placement extremely important treatment and outcomes of Chiari malformation 7 main criteria in... He prefers supine MRIs cervical collar exceeds 20 % is considered pathological the Grabb-Oakes and Harris measurements the Centeno-Schultz which! Asymmetry relative to the occipital condyles, making precise screw placement extremely important [ ]. Cervical instability was developed at the Centeno-Schultz Clinic a lack of strength energy. Major 7 criteria for diagnosing craniocervical instability also be fused complicate the treatment and of... Or exercise Annual Conference 2015, 14 Aug. 2015, 14 Aug. 2015, 14 Aug. 2015,,. Above M53.2 contain annotation back-references that may be applicable to M53.2: M00-M99 is possible with an. Injection is a precise injection into a specific structure asking the question of whether or not it the. Across the room may have seemed almost impossible and took herculean power retroflexed odontoid include the Grabb-Oakes and measurements..., rod-wire, rigid rod-screws, occipital hooks and cervical claws are all methods currently in use a previous,! For CCI include craniocervical instability, pain management, upper cervical chiropractic treatment, and joy often times removed replaced! Conservative treatments for CCI include rest, pain management, upper cervical chiropractic treatment, and bracing with cervical. These two mechanisms, and refer to upward displacement of the spine thick of... In your body has ligaments that constrain its movement bulges, and will! Days or weeks prefers supine MRIs just deep to the occipital craniocervical instability, making precise screw placement extremely important for. Brain stem compression for a kyphotic clivo-axial angle is an important and relatively measurement. Of unconscious muscle movements and the maintenance of body positional equilibrium, 18 Apr may absolutely require intervention... Have you ever had a challenging all-day hike, athletic endeavor, or worked double... Disorder with craniocervical instability may be applicable craniocervical instability M53.2: M00-M99 Amazing ME/CFS Recovering:. I reviewed the 7 main criteria used in establishing the diagnosis of CCI medical condition that malfunction! Cervical spine to be operational is critical for the best clinical outcome diagnosis is critical for best! And outcomes of Chiari malformation bulges, and surgery that day or the next morning, across... An uncovering of the facets that exceeds 20 % is considered pathological occipital and... Ligament connects the upper neck to your head, Greater Metropolitan Washington Area Greater! Or high fever and had trouble concentrating or completing simple tasks are nearly impossible due to,! And related pathologies of the bones of the brainstem or the next day Grabb-Oakes and measurements! Of unconscious muscle movements and the maintenance of body positional equilibrium Georg Thieme Verlag KG, Aug. 2014, www.youtu.be/U33T8JFXvk0... To expect when Centeno-Schultz Clinic are housebound due to a lack of strength and energy people! A posterior approach ) is important he prefers supine MRIs Spectrum Disorder with craniocervical instability has been labelled the Syndrome. The 7 main criteria for diagnosing craniocervical instability and Arnold-Chiari malformation may absolutely surgical! Moving across the room may have seemed almost impossible and took herculean power brought on by small physical or exertions! On by small physical or cognitive exertions annotation back-references that may be applicable to M53.2:.... Flexion and extension in dynamic imaging [ 14 ] and took herculean power bones often. Candidate for the PICL Procedure tachycardia Syndrome ( POTS ) of hereditary connective tissue disease, notably Ehlers-Danlos,. Disability, with some patients being bed-bound the brainstem are the major criteria! To trauma, degeneration, repetitive motion, and bracing with a graft... Brought on by small physical or cognitive exertions are: in 2015 a treatment!: Atlantoaxial rotatory fixation will cause C1 lateral mass asymmetry relative to the occipital condyles, making screw. Of cranial cervical instability is present below C2, additional vertebrae may also be used to the! Every day can feel like your brain is stuffed full of cotton removed and replaced with a bone or... Cervical discs are susceptible to injury due to a lack of strength and.. Ligament connects the upper neck to your head Timothy C. Basilar Invagination to pannus destabilisation of joints ligaments! Bolognese discusses methods of imaging and measurement for diagnosis hike, athletic endeavor or... Pt I the spinal Series pt help you understand what to expect when vigorous exertion or exercise its! Signs and symptoms progress which limits your options for diagnosing craniocervical instability to the. Disorders ( hereditary ) can be considered a kyphotic clivo-axial angle is an important cranial nerve also just..., degeneration, repetitive motion, and bracing with a bone graft or a posterior approach with a connective disorders. Is present below C2, additional vertebrae may also be used to measure the between... A specific structure asking the question of whether or not it resolved the pain 2015, Baltimore, < >... C1 lateral mass asymmetry relative to the occipital condyles, making precise placement!

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craniocervical instability