Educational only — not medical advice. This page explains a published mechanism of a medical condition for general education. It is not a diagnosis, not a treatment plan, and not a substitute for evaluation by a qualified clinician.
Cervical Radiculopathy: Why a Pinched Nerve in the Neck Hurts in the Arm
An 88-second narrated 3D animation of cervical radiculopathy — a pinched nerve root in the neck — with the full transcript and the peer-reviewed references behind every claim, so you can check what the science actually says.
Transcript
What the video says, beat by beat
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Pain that runs to the thumb
“Neck pain that runs down your arm and into your thumb often starts at one nerve root, right where it leaves the spine.”[1]
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A bony doorway for each root
“Each root leaves through a small bony doorway between two vertebrae.”[2]
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Wear, spurs, or a disc
“Over the years, the disc loses height and bone spurs grow around that doorway. The opening narrows, and the root is squeezed and irritated. In younger people, a herniated disc can do the same.”[1,2,3]
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Where it tingles points to the root
“Where the numbness or tingling lands often points to the root: the thumb for C6, the middle finger for C7, and the little finger for C8.”[4]
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Looking up makes it worse
“Looking up and toward the sore side narrows the doorway even more, so the arm pain often flares. Resting your hand on top of your head takes tension off the root, and can ease it.”[5,6,7]
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Most people get better
“Most people improve a great deal within a few months, with physical therapy and time. When the arm pain holds on, an image-guided injection can calm the inflamed root.”[8,9,10,11]
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When surgery is considered
“Surgery is reserved for weakness that keeps getting worse, or pain that won't settle.”[9,11]
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Signs the spinal cord is involved
“New clumsiness in the hands, unsteady walking, or changes in bladder control can mean the spinal cord is being squeezed. Those need the nearest emergency room, or call 911.”[12]
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Find the exact root
“Finding the exact root is what makes treatment precise.”[9]
What the science says
References
According to PubMed: every reference below was verified against its live PubMed record on September 27, 2026. Numeric findings from individual studies are attributed to those studies and are not promises of results. The film shows the C6 root as an example because of its thumb-side pattern; C7 is the root most often involved.
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Radhakrishnan K, Litchy WJ, O'Fallon WM, Kurland LT. Epidemiology of cervical radiculopathy. A population-based study from Rochester, Minnesota, 1976 through 1990. Brain. 1994;117(Pt 2):325-335.
Covers: 561 patients over 15 years — the C7 root was the most often involved, then C6; a confirmed disc protrusion caused 21.9% of cases and spondylosis, disc, or both 68.4%; at a median 4.9 years of follow-up, 90% were symptom-free or only mildly affected
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Tanaka N, Fujimoto Y, An HS, Ikuta Y, Yasuda M. The anatomic relation among the nerve roots, intervertebral foramina, and intervertebral discs of the cervical spine. Spine (Phila Pa 1976). 2000;25(3):286-291.
Covers: the foramen is funnel-shaped and narrowest at its entrance, where roots are compressed — in front by disc protrusion and uncovertebral osteophytes, behind by the superior articular process and ligamentum flavum
PubMed · PMID 10703098 · DOI · 10.1097/00007632-200002010-00005
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Bhaganagare AS, Nagesh SA, Shrihari BG, Naik V, Nagarjun MN, Pai BS. Management of cervical monoradiculopathy due to prolapsed intervertebral disc, an institutional experience. J Craniovertebr Junction Spine. 2017;8(2):132-135.
Covers: in younger people radiculopathy usually follows a disc herniation; in older people, foraminal narrowing from osteophytes, lost disc height, and uncovertebral and facet joint change (a surgical case series; its background summarizes the usual pattern)
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Lee MWL, McPhee RW, Stringer MD. An evidence-based approach to human dermatomes. Clin Anat. 2008;21(5):363-373.
Covers: a systematic review behind an evidence-based dermatome map — the most consistent skin areas for each root, with the overlap and variability that make the map a guide rather than a diagnosis
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Farmer JC, Wisneski RJ. Cervical spine nerve root compression. An analysis of neuroforaminal pressures with varying head and arm positions. Spine (Phila Pa 1976). 1994;19(16):1850-1855.
Covers: pressure measured inside the C5-C7 foramina rose significantly with neck extension and fell significantly when the arm was raised to rest overhead (shoulder abduction)
PubMed · PMID 7973984 · DOI · 10.1097/00007632-199408150-00010
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Davidson RI, Dunn EJ, Metzmaker JN. The shoulder abduction test in the diagnosis of radicular pain in cervical extradural compressive monoradiculopathies. Spine (Phila Pa 1976). 1981;6(5):441-446.
Covers: in 15 of 22 patients with a compressed cervical root, raising the arm to rest the hand on the head relieved the arm pain — relief the authors attribute to decreasing tension on the nerve root
PubMed · PMID 7302677 · DOI · 10.1097/00007632-198109000-00004
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Rubinstein SM, Pool JJM, van Tulder MW, Riphagen II, de Vet HCW. A systematic review of the diagnostic accuracy of provocative tests of the neck for diagnosing cervical radiculopathy. Eur Spine J. 2007;16(3):307-319.
Covers: Spurling's test (extension with the head turned toward the painful side) has low-to-moderate sensitivity and high specificity; the shoulder abduction test has low-to-moderate sensitivity and moderate-to-high specificity
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Wong JJ, Côté P, Quesnele JJ, Stern PJ, Mior SA. The course and prognostic factors of symptomatic cervical disc herniation with radiculopathy: a systematic review of the literature. Spine J. 2014;14(8):1781-1789.
Covers: substantial improvement tends to occur within the first 4 to 6 months after onset; most patients recover
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Woods BI, Hilibrand AS. Cervical radiculopathy: epidemiology, etiology, diagnosis, and treatment. J Spinal Disord Tech. 2015;28(5):E251-E259.
Covers: symptoms must match the imaging, because degenerative changes are common on scans; conservative care first (physical therapy, anti-inflammatory medication, epidural steroid injection), with 75%-90% improving without surgery; surgery for persistent symptoms or a significant deficit
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Bono CM, Ghiselli G, Gilbert TJ, et al. An evidence-based clinical guideline for the diagnosis and treatment of cervical radiculopathy from degenerative disorders. Spine J. 2011;11(1):64-72.
Covers: the North American Spine Society guideline on the natural history, diagnosis, and treatment of cervical radiculopathy from degenerative disorders
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Iyer S, Kim HJ. Cervical radiculopathy. Curr Rev Musculoskelet Med. 2016;9(3):272-280.
Covers: natural history and management — conservative care, physical therapy and steroid injections, and the indications and timing of surgery
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Davies BM, Mowforth OD, Smith EK, Kotter MR. Degenerative cervical myelopathy. BMJ. 2018;360:k186.
Covers: spinal cord compression in the neck — loss of hand dexterity, imbalance and falls, and bladder problems; progressive symptoms need an urgent MRI and specialist assessment, because delay leads to poorer, often permanent, outcomes