C4–C5 Radiculopathy

Last updated: February 8, 2026Reviewed date: February 8, 2026Reading time: 13 min read
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Article Summary

C4–C5 radiculopathy is a condition in which the nerve root exiting between the fourth (C4) and fifth (C5) cervical vertebrae becomes compressed or irritated. This compression leads to pain, numbness, tingling and sometimes weakness that follows the path of the C4 or C5 nerve root into the shoulder, upper arm, or chest. The most common causes include degenerative disc disease (wear-and-tear changes in the spine)...

Key Takeaways

  • This article explains Anatomy of the C4–C5 Nerve Root in simple medical language.
  • This article explains Types of C4–C5 Radiculopathy in simple medical language.
  • This article explains Causes in simple medical language.
  • This article explains Symptoms in simple medical language.
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Definition

C4–C5 is a condition in which the nerve root exiting between the fourth (C4) and fifth (C5) becomes compressed or irritated. This compression leads to , , and sometimes that follows the path of the C4 or C5 nerve root into the shoulder, upper arm, or chest. The most common causes include (wear-and-tear changes in the spine) and (bone spur) formation NCBI.

of the C4–C5 Nerve Root

  1. Structure & Location

    • The C4 and C5 nerve roots emerge from the through the intervertebral foramen between the C4 and C5 vertebrae.

    • They join the cervical plexus (C1–C4) and the brachial plexus (C5–T1), supplying both neck and shoulder regions NCBISpine-health.

  2. Origin & “Insertion” (Target Tissues)

    • Origin: Spinal cord segments C4 and C5.

    • Insertion: Sensory fibers carry impulses from the skin of the shoulder and upper arm; motor fibers innervate muscles such as the deltoid, biceps, rhomboids, and levator scapulae NCBI.

  3. Blood Supply

    • Small radicular branch from the vertebral arteries and the ascending cervical arteries.

    • These vessels run alongside the nerve root, providing oxygen and nutrients.

  4. Nerve Supply (Branches)

    • Dorsal scapular nerve (from C5): innervates rhomboids and levator scapulae.

    • Phrenic nerve contribution (C3–C5): helps control the .

    • Long nerve (C5–C7): controls serratus anterior.

  5. Key Functions

    1. Shoulder abduction (lifting the arm sideways) via the deltoid.

    2. Elbow flexion via the biceps.

    3. Scapular elevation and retraction via levator scapulae and rhomboids.

    4. Diaphragm support (partial breathing control) via phrenic contributions.

    5. Sensation over the lateral shoulder and upper arm.

    6. Biceps reflex (C5 reflex) maintenance NCBI.

Types of C4–C5 Radiculopathy

  1. vs.

    • Acute: Sudden , often after injury.

    • Chronic: Gradual development from degenerative changes.

  2. vs.

    • Unilateral: One side affected.

    • Bilateral: Both sides affected (rare at C4–C5).

  3. Compressive vs. Inflammatory

    • Compressive: Caused by physical pressure (e.g., , bone spur).

    • Inflammatory: Nerve irritation from or .

  4. Isolated C4 vs. Isolated C5

    • C4: Shoulder pain, neck pain, possible breathing issues.

    • C5: Deltoid weakness, biceps reflex loss, lateral upper arm sensory loss.

Causes

  1. Herniated cervical disc (degenerative or traumatic)

  2. Cervical (bone spur formation)

  3. Foraminal (narrowing of nerve exit)

  4. Degenerative disc disease (age-related disc wear)

  5. Traumatic injury (e.g., , )

  6. Spinal tumors ( or malignant)

  7. Epidural abscess (infection around spinal cord)

  8. Cervical spondylosis (overall cervical spine degeneration)

  9. Rheumatoid arthritis (joint inflammation)

  10. Osteoporosis-related collapse (vertebral compression)

  11. Post-surgical scar tissue (after neck surgery)

  12. Spinal vascular malformations (abnormal vessels)

  13. Paget’s disease (abnormal bone remodelling)

  14. Bone metastases (spread of cancer to vertebrae)

  15. Inflammatory neuropathies (e.g., Guillain–Barré, Lyme disease)

  16. Mechanical trauma (whiplash)

  17. Poor posture (chronic forward head tilt)

  18. Spinal cysts (synovial or Tarlov cysts)

  19. Obesity (increased mechanical load)

  20. Smoking (accelerates degenerative changes) WebMD.

Symptoms

  1. Neck pain (local discomfort at C4–C5)

  2. Radiating shoulder pain (follows the nerve path) Physiopedia

  3. Arm tingling or “pins and needles”

  4. Numbness in lateral upper arm

  5. Deltoid muscle weakness (difficulty lifting arm)

  6. Biceps weakness (difficulty bending elbow)

  7. Reduced biceps reflex

  8. Scapular pain (blade-area ache)

  9. Shoulder blade muscle spasm

  10. Muscle twitching (fasciculations)

  11. Neck stiffness (reduced range of motion)

  12. Headaches (base of skull)

  13. Radiating chest pain (rare, misdiagnosed as cardiac)

  14. Fatigue (from chronic pain)

  15. Sleep disturbance (pain-related insomnia)

  16. Loss of coordination (fine motor tasks)

  17. Grip weakness (often mild)

  18. Muscle atrophy (chronic cases)

  19. Hypersensitivity (light touch causes pain)

  20. Postural imbalance (compensatory leaning)

Diagnostic Tests

  1. Detailed medical history (onset, progression)

  2. Physical exam (strength, sensation, reflexes)

  3. Spurling’s test (neck extension + rotation induces pain)

  4. Shoulder abduction relief test (hand on head reduces pain)

  5. Cervical range of motion assessment

  6. Dermatomal mapping (sensory testing)

  7. Myotomal testing (motor strength)

  8. Reflex testing (biceps, brachioradialis)

  9. Plain X-rays (alignment, bone spurs)

  10. MRI of cervical spine (disc, nerve compression)

  11. CT scan (bony detail)

  12. CT myelogram (contrast assessment of spinal canal)

  13. Electromyography (EMG) (muscle electrical activity)

  14. Nerve conduction studies (NCS)

  15. Ultrasound (nerve movement/dynamic)

  16. Bone scan (tumor or infection)

  17. ESR & CRP blood tests (inflammation/infection)

  18. CBC (rule out infection)

  19. Diagnostic nerve blocks (localize pain source)

  20. Provocative discography (disc pain confirmation)

Non-Pharmacological Treatments

  1. Physical therapy (targeted exercises) AAFP

  2. Cervical traction

  3. Posture correction training

  4. Ergonomic workstation setup

  5. Neck collar (soft)

  6. Heat therapy

  7. Cold packs

  8. Transcutaneous electrical nerve stimulation (TENS)

  9. Acupuncture

  10. Massage therapy

  11. Chiropractic mobilization

  12. Yoga/stretching routines

  13. Pilates

  14. Aerobic conditioning

  15. Neural mobilization exercises

  16. Inversion table therapy

  17. Ultrasound therapy

  18. Low-level laser therapy

  19. Shockwave therapy

  20. Biofeedback

  21. Mindfulness meditation

  22. Cognitive-behavioral therapy (CBT)

  23. Aquatic therapy

  24. Relaxation techniques

  25. Postural taping

  26. Ergonomic pillow

  27. Weighted cervical pillows

  28. Lifestyle modification programs

  29. Activity pacing

  30. Patient education & self-care training

Drugs

  1. Ibuprofen (NSAID)

  2. Naproxen (NSAID)

  3. Diclofenac (NSAID)

  4. Celecoxib (COX-2 inhibitor)

  5. Acetaminophen (analgesic)

  6. Prednisone (oral steroid taper)

  7. Methylprednisolone (steroid burst pack)

  8. Gabapentin (neuropathic pain)

  9. Pregabalin (neuropathic pain)

  10. Amitriptyline (TCA for nerve pain)

  11. Duloxetine (SNRI)

  12. Carbamazepine (nerve pain)

  13. Cyclobenzaprine (muscle relaxant)

  14. Tizanidine (muscle relaxant)

  15. Diazepam (muscle relaxant)

  16. Tramadol (opioid-like)

  17. Codeine (weak opioid)

  18. Morphine (strong opioid, short-term)

  19. Epidural steroid injection (interventional)

  20. Trigger point injections (local anesthetic ± steroid)

Surgical Options

  1. Anterior cervical discectomy and fusion (ACDF)

  2. Cervical disc arthroplasty (artificial disc replacement)

  3. Posterior cervical foraminotomy

  4. Laminectomy (posterior decompression)

  5. Laminoplasty (expand spinal canal)

  6. Posterior fusion (stabilization)

  7. Microdiscectomy

  8. Osteophyte removal

  9. Facet joint resection

  10. Expandable cage fusion

Prevention Strategies

  1. Maintain good posture (neutral spine)

  2. Ergonomic work setups

  3. Regular neck-strengthening exercises

  4. Avoid heavy overhead lifting

  5. Use proper lifting techniques

  6. Maintain healthy weight

  7. Quit smoking

  8. Stay well-hydrated (disc health)

  9. Take frequent activity breaks

  10. Use supportive pillows

When to See a Doctor

Seek medical attention if you experience:

  • Progressive muscle weakness or difficulty lifting your arm

  • Loss of bowel or bladder control (rare but serious)

  • Severe, unrelenting pain that does not improve with rest or medication

  • Fever or chills (possible infection)

  • History of cancer or infection with new neck pain

  • Traumatic injury to the neck

Frequently Asked Questions

  1. What makes C4–C5 different from other levels?
    C4–C5 controls shoulder abduction (lifting the arm sideways) and biceps flexion. Compression here often causes shoulder pain and arm weakness.

  2. Can C4–C5 radiculopathy improve on its own?
    Yes. Many cases resolve over 6–12 weeks with conservative care such as rest and physical therapy AAFP.

  3. Is surgery always required?
    No. Surgery is reserved for severe cases with persistent pain or weakness despite 6–12 weeks of conservative treatment.

  4. How accurate is an MRI?
    MRI is >90% sensitive for detecting nerve root compression but must be correlated with your symptoms.

  5. Are injections safe?
    Epidural steroid injections carry small risks (infection, bleeding) but can provide significant relief.

  6. Can posture cause radiculopathy?
    Poor posture increases stress on cervical discs and may accelerate degenerative changes.

  7. How soon can I return to work?
    Light duties may be possible within days; heavy or overhead work may need weeks of modification.

  8. What exercises help?
    Neck isometric holds, scapular retractions, gentle cervical traction, and stretching improve strength and flexibility.

  9. Does weight loss help?
    Yes. Reducing body weight lessens spinal loading and may slow degeneration.

  10. Is C4–C5 radiculopathy permanent?
    Most patients fully recover; a small percentage develop chronic pain or weakness.

  11. Should I wear a neck collar?
    Short-term use (1–2 weeks) of a soft collar can ease pain but long-term use may weaken muscles.

  12. Are there alternatives to opioids?
    Yes. NSAIDs, neuropathic agents (gabapentin), physical therapy, and injections are often effective.

  13. Can it cause headache?
    Yes. Irritation of upper cervical joints can refer pain to the base of the skull.

  14. Does diabetes affect recovery?
    Poorly controlled diabetes may slow nerve healing; glucose control is important.

  15. When is fusion recommended over disc replacement?
    Fusion is chosen when there is instability or multiple levels involved; disc replacement preserves motion at a single level.

Disclaimer: Each person’s journey is unique, treatment plan, life style, food habit, hormonal condition, immune system, chronic disease condition, geological location, weather and previous medical  history is also unique. So always seek the best advice from a qualified medical professional or health care provider before trying any treatments to ensure to find out the best plan for you. This guide is for general information and educational purposes only. Regular check-ups and awareness can help to manage and prevent complications associated with these diseases conditions. If you or someone are suffering from this disease condition bookmark this website or share with someone who might find it useful! Boost your knowledge and stay ahead in your health journey. We always try to ensure that the content is regularly updated to reflect the latest medical research and treatment options. Thank you for giving your valuable time to read the article.

The article is written by Team Rxharun and reviewed by the Rx Editorial Board Members

Last Updated: May 04, 2025.

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  35. https://www.jaad.org/
  36. https://www.psoriasis.org/about-psoriasis/
  37. https://books.google.com/books?
  38. https://www.niams.nih.gov/health-topics/skin-diseases
  39. https://cms.centerwatch.com/directories/1067-fda-approved-drugs/topic/292-skin-infections-disorders
  40. https://www.fda.gov/files/drugs/published/Acute-Bacterial-Skin-and-Skin-Structure-Infections—Developing-Drugs-for-Treatment.pdf
  41. https://dermnetnz.org/topics
  42. https://www.aaaai.org/conditions-treatments/allergies/skin-allergy
  43. https://www.sciencedirect.com/topics/medicine-and-dentistry/occupational-skin-disease
  44. https://aafa.org/allergies/allergy-symptoms/skin-allergies/
  45. https://www.nibib.nih.gov/
  46. https://www.nei.nih.gov/
  47. https://en.wikipedia.org/wiki/List_of_skin_conditions
  48. https://en.wikipedia.org/?title=List_of_skin_diseases&redirect=no
  49. https://en.wikipedia.org/wiki/Skin_condition
  50. https://oxfordtreatment.com/
  51. https://www.nidcd.nih.gov/health/
  52. https://consumer.ftc.gov/articles/w
  53. https://www.nccih.nih.gov/health
  54. https://catalog.ninds.nih.gov/
  55. https://www.aarda.org/diseaselist/
  56. https://www.ninds.nih.gov/Disorders/Patient-Caregiver-Education/Fact-Sheets
  57. https://www.nibib.nih.gov/
  58. https://www.nia.nih.gov/health/topics
  59. https://www.nichd.nih.gov/
  60. https://www.nimh.nih.gov/health/topics
  61. https://www.nichd.nih.gov/
  62. https://www.niehs.nih.gov
  63. https://www.nimhd.nih.gov/
  64. https://www.nhlbi.nih.gov/health-topics
  65. https://obssr.od.nih.gov/
  66. https://www.nichd.nih.gov/health/topics
  67. https://rarediseases.info.nih.gov/diseases
  68. https://beta.rarediseases.info.nih.gov/diseases
  69. https://orwh.od.nih.gov/

 

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Doctor visit helper

Prepare before seeing a doctor

A simple rural-patient checklist to help you explain symptoms clearly, ask better questions, and avoid unsafe self-treatment.

Safety note: This is not a prescription or diagnosis. For severe symptoms, pregnancy danger signs, children with serious illness, chest pain, breathing difficulty, stroke-like weakness, or major injury, seek urgent care.

Which doctor may help?

Orthopedic doctor, spine specialist, neurologist, or physiotherapist depending on severity.

What to tell the doctor

  • Mark pain area and whether pain travels to leg.
  • Write numbness, weakness, bladder/bowel problem, fever, injury, or night pain if present.
  • Bring previous X-ray/MRI and medicine list.

Questions to ask

  • Is this muscle pain, disc problem, nerve pressure, arthritis, infection, or another cause?
  • Do I need X-ray or MRI now?
  • Which activities should I avoid and which exercises are safe?
  • When can I return to work?

Tests to discuss

  • Spine and neurological examination
  • Straight leg raise or similar nerve tension tests
  • X-ray if trauma/deformity/chronic pain is suspected
  • MRI if leg weakness, sciatica, or red flags are present

Avoid these mistakes

  • Avoid heavy lifting, long bed rest, and untrained spinal manipulation.
  • Avoid NSAIDs if ulcer, kidney disease, blood thinner use, pregnancy, or allergy unless doctor says safe.

Medicine safety and first-aid guide

This section is for patient education only. It does not replace a doctor, pharmacist, or emergency care.

Safe first steps

  • Avoid heavy lifting, sudden bending, and prolonged bed rest.
  • Use comfortable posture and gentle movement as tolerated.
  • Discuss physiotherapy, X-ray, or MRI only when clinically needed.

OTC medicine safety

  • For mild back pain, pain-relief medicine may be discussed with a doctor or pharmacist.
  • Avoid repeated painkiller use if you have kidney disease, stomach ulcer, uncontrolled blood pressure, or are taking blood thinners.

Avoid these mistakes

  • Do not start antibiotics without a proper medical decision.
  • Do not use steroid tablets or injections casually for quick relief.
  • Do not delay emergency care because of home remedies.

Get urgent help if

  • Back pain with leg weakness, numbness around private area, loss of urine/stool control, fever, cancer history, or major injury needs urgent care.
Medicine names, dose, and timing must be decided by a qualified clinician or pharmacist after checking age, pregnancy, allergy, other diseases, and current medicines.

For rural patients and family caregivers

Patient health record and symptom diary

Write your symptoms, medicines already taken, test results, and questions before visiting a doctor. This note stays on your device unless you print or copy it.

Doctor to discuss: Orthopedic / spine specialist, physical medicine doctor, or qualified clinician
Tests to discuss with doctor
  • Neurological examination for leg power, sensation, reflexes, and straight leg raise
  • X-ray only if injury, deformity, long-lasting pain, or doctor suspects bone problem
  • MRI discussion if severe nerve symptoms, weakness, bladder/bowel problem, or persistent symptoms
Questions to ask
  • What is the most likely cause of my symptoms?
  • Which warning signs mean I should go to emergency care?
  • Which tests are really needed now?
  • Which medicines are safe for my age, pregnancy status, allergy, kidney/liver/stomach condition, and current medicines?
  • Is physiotherapy, posture correction, or activity modification needed?

Emergency warning signs such as chest pain, severe breathing difficulty, sudden weakness, confusion, severe dehydration, major injury, or loss of bladder/bowel control need urgent medical care. Do not wait for online information.

Safe pathway to proper treatment

Care roadmap for: C4–C5 Radiculopathy

Use this simple roadmap to understand the next safe steps. It is educational and does not replace examination by a doctor.

Go to emergency care if you notice:
  • Severe or rapidly worsening symptoms
  • Breathing difficulty, chest pain, fainting, confusion, severe weakness, major injury, or severe dehydration
Doctor / service to discuss: Qualified healthcare provider; specialist depends on symptoms and examination.
  1. Step 1

    Check danger signs first

    If danger signs are present, seek emergency care and do not wait for online information.

  2. Step 2

    Record the symptom story

    Write when symptoms started, severity, medicines already taken, allergies, pregnancy status, and test results.

  3. Step 3

    Visit a qualified clinician

    A doctor, nurse, or qualified healthcare provider can examine you and decide which tests or treatment are needed.

  4. Step 4

    Do only useful tests

    Do tests after clinical assessment. Avoid unnecessary tests, random antibiotics, or repeated medicines without diagnosis.

  5. Step 5

    Follow up and return early if worse

    If symptoms worsen, new warning signs appear, or treatment is not helping, return for review quickly.

Rural patient practical tips
  • Take a written symptom diary and all previous prescriptions/test reports.
  • Do not hide medicines already taken, even herbal or over-the-counter medicines.
  • Ask which warning signs mean urgent referral to hospital.

This roadmap is for education. A real diagnosis and treatment plan requires history, examination, and clinical judgment.

Internal learning pathway

Explore related RX articles

Related guides from RX Harun are grouped to help readers move from overview to symptoms, tests, treatment, and safe next steps.

Degenerative Bones, Joints, and Spine Care (A - Z)
  1. Undescended Shoulder Disease DefinitionUndescended shoulder disease is not the usual medical name. Doctors usually call this condition Sprengel deformity,…
  2. Sprengel Deformity DefinitionSprengel deformity is a birth condition in which one shoulder blade?, called the scapula?, stays higher…
  3. High Shoulder Blade DefinitionA high shoulder blade? usually means one shoulder blade sits higher than normal from birth. The…
  4. High Scapula DefinitionHigh scapula? is a condition where one shoulder blade? sits higher than normal on the back…
  5. Upward Displacement of the Scapula DefinitionUpward displacement of the scapula? usually means congenital? elevation of the scapula, which is most often…
  6. Congenital Elevation of Scapula DefinitionCongenital? elevation of scapula? means a baby is born with one shoulder blade? sitting higher than…