Median Nerve Neuritis C&P Exam Prep

Grip Strength Testing (Bilateral)

What it measures: Motor function of the median nerve, specifically the extrinsic flexors of the hand. Reduced grip strength on the affected side compared to the contralateral side indicates motor involvement of the median nerve.

What to expect: Examiner will ask you to squeeze a dynamometer or the examiner's fingers as hard as possible, typically three times. Both hands will be tested. Results are compared bilaterally. The examiner documents whether grip is normal, mildly reduced, moderately reduced, or severely reduced.

Pain considerations: If squeezing causes significant pain in the palm, thumb base, or fingers, verbalize this to the examiner during the test. Pain during grip testing is relevant to functional loss beyond the measured strength value.

Pinch Strength Testing (Lateral and Opposition Pinch)

What it measures: Thenar muscle function innervated by the median nerve, specifically the abductor pollicis brevis, flexor pollicis brevis, and opponens pollicis. Opposition pinch (tip of thumb to tip of index finger) is a classic median nerve function test.

What to expect: Examiner will ask you to pinch between thumb and index finger, or hold a small object between the tips of thumb and fingers. Both sides will be compared. Weakness or inability to perform opposition is a strong indicator of median nerve motor involvement.

Pain considerations: Pinching may provoke pain at the thenar eminence or radiate into the fingers. Tell the examiner if the pinch itself causes pain, not just weakness.

Tinel's Sign at the Wrist/Forearm

What it measures: Nerve irritability and the presence of neuritis or nerve compression along the median nerve course. A positive Tinel's sign (tingling or electric sensation shooting into the median nerve distribution when the nerve is tapped) supports the diagnosis of median nerve pathology.

What to expect: The examiner will lightly tap over the carpal tunnel at the wrist or along the forearm. A positive result produces tingling, electric shock, or paresthesias shooting into the thumb, index finger, middle finger, and/or lateral ring finger.

Pain considerations: If the tapping is painful rather than just producing tingling, clearly state 'that is painful' so the examiner records pain rather than only paresthesias.

Phalen's Sign (Wrist Flexion Test)

What it measures: Reproduction of median nerve symptoms (numbness, tingling, pain) with sustained wrist flexion. A positive Phalen's sign indicates median nerve compromise at or near the carpal tunnel.

What to expect: Examiner will ask you to hold your wrists in a flexed position (backs of hands touching, fingers pointing downward) for up to 60 seconds. Positive if tingling or numbness develops in the median nerve distribution within 60 seconds.

Pain considerations: If wrist flexion itself is painful (not just producing tingling), state this. Pain reproduced by wrist flexion is separately relevant.

Sensory Testing (Light Touch and Pinprick)

What it measures: The integrity of sensory fibers in the median nerve. Tests whether diminished, absent, or altered sensation is present over the palmar surface of the thumb, index finger, middle finger, and lateral half of the ring finger, as well as the dorsal tips of those digits.

What to expect: Examiner will touch or prick the skin in various areas of your hand and fingers, asking you to compare sensation on the affected hand to the unaffected hand or to a reference area. You may be asked to close your eyes and report where and when you feel the stimulus.

Pain considerations: Allodynia (pain from light touch) should be explicitly stated. Do not tolerate painful stimuli silently - verbalize your experience.

Thenar Muscle Atrophy Assessment

What it measures: The presence of organic change due to median nerve denervation. Thenar muscle wasting (visible or measurable atrophy at the base of the thumb on the palm) is a key organic change that raises the maximum allowable rating for neuritis.

What to expect: Examiner will visually inspect and may measure circumference of both hands/forearms to compare muscle bulk. Thenar atrophy may also be detected by palpation. The examiner documents location and estimated degree of atrophy.

Pain considerations: Atrophy itself is not painful but may be associated with weakness and functional loss. Connect the atrophy to specific functional limitations you experience.

10%

Mild incomplete paralysis of the median nerve. Under DC 8615 for neuritis, this applies when symptoms are sensory in nature, recurrent but not continuous, reflecting a lower degree of nerve impairment. Per M21-1 guidance, purely sensory peripheral nerve disabilities are rated mild or at most moderate. The mild level is appropriate when sensory symptoms are intermittent and/or affect a smaller portion of the median nerve distribution.

From 38 CFR: Mild incomplete paralysis under DC 8515 (median nerve) - neuritis rated by analogy to incomplete paralysis levels; mild represents substantially less impairment than the full description for that nerve's paralysis.

20%

Moderate incomplete paralysis of the median nerve. This is the maximum rating achievable for neuritis WITHOUT organic changes (such as muscle atrophy, trophic changes, or vasomotor changes). Per M21-1, the moderate level is reserved for the most significant and disabling cases of sensory-only involvement, or for cases where some motor involvement is present but not accompanied by organic changes. Symptoms are more constant, affect a broader area, and produce meaningful functional limitation.

From 38 CFR: Moderate incomplete paralysis represents the ceiling for neuritis without organic changes per M21-1 V.iii.12.A.2.b. Pain described as dull, burning, or aching throughout the median nerve territory with functional limitations on grip and fine motor tasks.

30%

Moderately severe incomplete paralysis of the median nerve. This level requires the presence of organic changes (thenar atrophy, trophic skin changes, vasomotor changes) or significant combined sensory and motor deficits. For neuritis WITH organic changes, the maximum allowable rating is severe incomplete paralysis, so moderately severe represents a significant intermediate level. Functional use of the hand is substantially impaired.

From 38 CFR: When organic changes (thenar atrophy, trophic changes) are present, the maximum for neuritis under DC 8615 is severe incomplete paralysis. Moderately severe reflects marked functional loss of the hand with documented organic evidence of nerve damage.

50%

Severe incomplete paralysis of the median nerve. This is the maximum rating for neuritis WITH organic changes under DC 8615. Represents near-complete functional loss of median nerve function with substantial permanent organic changes. The hand is profoundly limited in all fine motor and grip activities. Organic changes are marked and documented. This is the ceiling for neuritis under DC 8615 per 38 CFR 4.124a and M21-1 V.iii.12.A.2.b.

From 38 CFR: Severe incomplete paralysis is the maximum allowable evaluation for neuritis under DC 8615 when organic changes are present. This represents substantially less impairment than complete paralysis of the median nerve but reflects the most severe manifestation of neuritis with demonstrable nerve damage.

Pain Character and Distribution

How to describe it: Describe the quality (burning, electric, aching, stabbing, dull), location (specify which fingers and areas of the hand or forearm), frequency (constant vs. intermittent), severity (0-10 scale on a bad day), and what makes it better or worse. Median nerve pain typically affects the palm and the thumb, index, middle, and lateral ring finger.

Example: On my worst days, I have a constant burning and electric pain that runs from my wrist through my palm and into my thumb, index, and middle fingers. It rates an 8 out of 10. Holding anything - even a glass of water - makes it worse. The pain wakes me up at night and I have to shake my hand out for 10 to 15 minutes before it settles down.

Examiner listens for: Specificity of distribution matching the median nerve territory, quality descriptors consistent with neuropathic pain, frequency and duration patterns, nocturnal worsening (classic for median nerve neuritis), and functional impact.

Avoid: Do not say 'it is not that bad' or 'I manage okay.' Do not minimize nocturnal symptoms. Do not describe only your average day - describe your worst typical day.

Sensory Loss and Paresthesias

How to describe it: Specify which fingers and areas are numb or tingly, whether it is constant or comes and goes, what triggers it (typing, gripping, holding a steering wheel, sleeping), and how long episodes last. Distinguish between numbness (reduced sensation) and tingling/burning (active sensory disturbance).

Example: My thumb, index finger, and middle finger on the right hand are numb almost constantly. On bad days the numbness extends into my palm. I cannot tell the difference between hot and cold in those fingers, and I have burned myself several times because I did not feel the heat. The tingling is like pins and needles that never fully goes away.

Examiner listens for: Consistency of the distribution with the median nerve (not extending to the little finger, which would suggest ulnar nerve involvement), whether symptoms are constant or provoked, and safety concerns such as burns or cuts due to sensory loss.

Avoid: Do not say 'just a little numbness.' Numbness that causes safety hazards (burns, cuts, dropped objects) is significant and should be stated explicitly.

Motor Weakness and Functional Loss

How to describe it: Describe specific tasks you can no longer perform or perform with difficulty due to weakness in your hand. Focus on grip strength, pinch strength, and thumb opposition. Quantify if possible (e.g., 'I can only hold a pen for 5 minutes before my hand gives out').

Example: I can barely pick up a coin off a flat surface because my thumb and index finger do not have the strength to pinch. I drop objects multiple times per day. I cannot button my shirt with my dominant hand and I have had to switch to Velcro clothing. Typing for more than 10 minutes causes my grip to give out entirely.

Examiner listens for: Specific functional limitations (buttoning, typing, writing, opening jars, turning keys), frequency of dropping objects, any adaptive behaviors, and whether weakness worsens with use (DeLuca factor for repetitive use).

Avoid: Do not demonstrate maximum effort grip during the exam if that effort causes significant pain or if you could not sustain it. Do not say 'I can still do most things' if you have made significant adaptations to your daily routine.

Muscle Atrophy and Organic Changes

How to describe it: Point out any visible wasting at the base of your thumb (thenar eminence). Describe changes in your skin in the affected fingers (dryness, cracking, nail changes). Compare your affected hand to your unaffected hand visually for the examiner.

Example: The muscle at the base of my right thumb is noticeably smaller and flatter than my left. My right thumb side of my palm looks hollow compared to the other hand. My index and middle fingers have very dry, cracked skin that does not seem to heal normally. My nails on those fingers have become ridged and brittle.

Examiner listens for: Objective evidence of organic changes that raise the maximum allowable rating for neuritis: thenar atrophy, trophic skin changes, vasomotor changes. These are critical because they unlock the higher rating tiers for DC 8615.

Avoid: Do not assume the examiner will notice subtle atrophy. Actively point to it and describe when you first noticed the change.

Flare-Ups and Repetitive Use Worsening

How to describe it: Describe what triggers worsening of your symptoms (e.g., sustained gripping, typing, vibration, cold weather), how long flare-ups last, how frequently they occur, and what level of activity triggers them. This directly satisfies DeLuca factors for neurological conditions.

Example: After typing for more than 15 minutes my entire hand goes numb and the burning pain increases from a 3 to an 8. I then cannot use my hand effectively for the next 2 to 3 hours. Cold weather makes my fingers numb and useless within minutes. I have three to four severe flare-ups per week that force me to stop all hand activity.

Examiner listens for: Threshold of activity that triggers symptom worsening, duration of flare-ups, frequency, impact on ability to work or perform sustained tasks, and correlation with occupational or daily activities.

Avoid: Do not describe your symptoms only at rest. If your condition is worsened by use - which is the nature of neuritis - you must describe that worsening pattern explicitly.

Impact on Work and Daily Life

How to describe it: Describe specifically how median nerve neuritis affects your occupational functioning, hobbies, self-care, and relationships. Quantify time lost from work or required accommodations. Describe any modifications you have made to perform daily tasks.

Example: I had to stop working as a [occupation] because I can no longer grip tools for more than a few minutes. I have lost income and had to transfer to a lighter duty position. At home, I cannot open jars, type emails, or write checks. My wife helps me with buttons and small tasks. I have given up guitar playing, which I had done for 30 years.

Examiner listens for: The examiner is required to document the impact of the peripheral nerve condition on occupational function. Specific, concrete examples are far more useful than general statements.

Avoid: Do not say 'I manage.' Describe what managing actually costs you - the adaptations, the pain, the lost activities, the help you require from others.