Radiculopathy / Peripheral Nerves C&P Exam Prep

Deep Tendon Reflex Testing

What it measures: Integrity of the reflex arc for specific nerve roots and peripheral nerves. Reduced or absent reflexes suggest nerve damage or demyelination.

What to expect: The examiner will tap specific tendons with a reflex hammer: biceps (C5-C6), brachioradialis (C6), triceps (C7), patellar/knee (L3-L4), and Achilles/ankle (S1). Results are graded 0 (absent) to 4+ (hyperactive).

Pain considerations: Pain during reflex testing should be reported immediately. Note whether the tap itself reproduces your radiating pain pattern.

Manual Muscle Strength Testing (MMT)

What it measures: Motor function of muscles innervated by specific peripheral nerves or nerve roots. Graded on the Medical Research Council (MRC) 0-5 scale.

What to expect: The examiner will ask you to resist force applied to specific muscle groups. For lower extremity radiculopathy (DC 8521/sciatic): hip extension, knee flexion, ankle dorsiflexion (toe walking), plantar flexion (heel walking), toe extension. For upper extremity: grip, pinch, wrist flexion/extension, elbow flexion/extension, finger abduction/adduction.

Pain considerations: Pain that limits muscle testing effort must be verbally reported during the test. State: 'I am stopping due to pain radiating into my [leg/arm] at approximately [pain scale rating]/10.' This documents pain-limited strength testing per DeLuca v. Brown principles.

Sensory Testing (Light Touch, Pinprick, Vibration)

What it measures: Integrity of sensory nerve fibers in dermatomal distributions. Reduced or absent sensation in a specific pattern identifies which nerve root or peripheral nerve is involved.

What to expect: The examiner will use a pin, cotton wisp, or tuning fork to test sensation in specific areas of your skin. For sciatic nerve (DC 8521): posterior thigh, lateral leg, dorsum of foot, plantar surface. For upper extremity nerves: specific hand/forearm distributions per radial, median, or ulnar nerve territories.

Pain considerations: Burning pain (causalgia) and hypersensitivity to touch in the affected nerve distribution should be specifically described. These symptoms support neuritis findings and can affect rating level.

Tinel's Sign

What it measures: Nerve irritability or regeneration at a specific anatomical point. A positive test (tingling/pain radiating in the nerve distribution when tapped) suggests nerve damage or entrapment.

What to expect: The examiner will tap over the course of a peripheral nerve (e.g., carpal tunnel at wrist for median nerve, cubital tunnel at elbow for ulnar nerve, fibular head for common peroneal nerve). A positive sign produces tingling or electrical sensation radiating into the nerve's territory.

Pain considerations: The tapping itself may cause sharp radiating pain - describe the quality and distribution of that pain during the test.

Phalen's Test (Wrist Flexion Test)

What it measures: Median nerve compression at the carpal tunnel. Relevant for upper extremity radiculopathy and median nerve conditions.

What to expect: The examiner will ask you to hold your wrists in maximum flexion (or extension) for 60 seconds. A positive test reproduces numbness, tingling, or pain in the thumb, index, and middle fingers (median nerve distribution).

Pain considerations: If maintaining the wrist position causes pain radiating up your arm or into your fingers, describe this carefully - it distinguishes central (cervical) from peripheral entrapment.

Muscle Atrophy Measurement

What it measures: Circumferential measurement of limb segments to document muscle wasting from denervation or disuse. A significant difference between affected and unaffected sides indicates chronic nerve damage.

What to expect: The examiner will measure circumference of your limbs at standardized points (e.g., mid-thigh, mid-calf, mid-forearm) with a tape measure and compare both sides. Results are recorded in centimeters.

Pain considerations: Muscle atrophy from disuse due to pain is still valid and should be documented. Mention if you avoid using the limb due to pain-related fear of aggravation.

Straight Leg Raise (SLR) / Las-gue Test

What it measures: Nerve root tension, particularly L4-S1 (sciatic nerve distribution). Positive test reproduces radicular pain below the knee when the leg is raised between 30-70 degrees while supine.

What to expect: While lying on your back, the examiner will lift your leg with knee straight. A positive result is reproduction of your typical leg pain (not just back pain) radiating below the knee at 30-70 degrees of elevation. Crossed SLR (pain in symptomatic leg when contralateral leg is raised) is highly specific for disc herniation.

Pain considerations: Pain at the angle where symptoms begin should be clearly noted. State both the character ('burning,' 'electric,' 'shooting') and distribution ('down the back of my leg to my foot/toes').

10%

Neuralgia - mild symptoms, occasional pain or paresthesias, minor sensory changes in the peripheral nerve distribution. For DC 8521 (sciatic nerve), this represents mild incomplete neuralgia of the sciatic nerve characterized by intermittent symptoms with minimal functional impact.

From 38 CFR: Under 38 CFR 4.124a, neuralgia of the sciatic nerve (DC 8521) at the mild level reflects occasional painful episodes in the nerve distribution without significant motor loss or constant symptoms.

20%

Neuritis or incomplete paralysis - mild degree. Persistent but mild motor and sensory deficits with some functional limitation. For DC 8521, this includes mild weakness in sciatic-innervated muscles, diminished reflexes, and sensory deficits that are present but not severely limiting.

From 38 CFR: Under 38 CFR 4.124a, mild incomplete paralysis/neuritis of the sciatic nerve (DC 8521) reflects mild but measurable deficit in motor and sensory function without severe impairment.

40%

Incomplete paralysis - moderate degree. Significant motor and sensory deficits with meaningful functional loss. For DC 8521 (sciatic nerve), this includes moderate weakness in sciatic distribution muscles, reduced or absent reflexes, and sensory loss that significantly impairs daily function and ambulation.

From 38 CFR: Under 38 CFR 4.124a, moderate incomplete paralysis of the sciatic nerve (DC 8521) reflects substantial but not complete loss of function with measurable motor deficit and sensory impairment.

60%

Incomplete paralysis - moderately severe degree. Marked motor and sensory deficits with significant impairment to extremity function. For DC 8521, this includes marked weakness with difficulty ambulating, significant muscle atrophy, severely reduced reflexes, and extensive sensory loss across the sciatic distribution.

From 38 CFR: Under 38 CFR 4.124a, moderately severe incomplete paralysis of the sciatic nerve (DC 8521) reflects marked functional loss approaching but not meeting complete paralysis, with substantial impact on the veteran's ability to use the affected extremity.

80%

Complete paralysis or severe incomplete paralysis. For DC 8521 (sciatic nerve), complete paralysis means complete loss of function of all sciatic-innervated muscles - no movement of knee flexion, ankle, or foot possible. The foot hangs in equinus position; no active motion in foot or toes. This is the maximum schedular rating for DC 8521.

From 38 CFR: Under 38 CFR 4.124a DC 8521, complete paralysis of the sciatic nerve is assigned 80% for the major extremity and 60% for the minor extremity. This is the highest schedular rating for this nerve.

Pain Quality and Distribution

How to describe it: Describe the exact character (burning, stabbing, electric shock, aching, cramping), intensity on a 0-10 scale, and the precise pathway the pain travels. For sciatic radiculopathy: 'I have a burning, electric shock-type pain that starts in my lower back, radiates through my left buttock, down the back of my thigh, into the outer calf, and into the top of my foot and toes.' Always specify which side is affected and whether it is constant or intermittent.

Example: On my worst days, the burning pain in my left leg is 9/10 and I cannot sit for more than 10 minutes, stand for more than 5 minutes, or walk more than half a block without stopping due to radiating pain. The pain wakes me from sleep at least 3 nights per week. I cannot drive because the pain increases when I press the accelerator pedal.

Examiner listens for: Dermatomal distribution consistent with a specific nerve root or nerve (particularly below the knee for L5/S1 sciatic involvement), pain character suggesting neuropathic etiology (burning, electric, lancinating), and pain that radiates in a predictable pattern rather than diffuse musculoskeletal pain.

Avoid: Do not say 'it's not that bad' or 'I manage it.' Do not describe only your best days. Do not omit the radiating component - many veterans only mention back pain and forget to describe the leg pain that drives the radiculopathy rating.

Weakness and Motor Deficits

How to describe it: Be specific about which functional tasks are limited by weakness versus pain. For sciatic nerve: 'My left foot feels heavy and I trip over my own foot when walking because I cannot lift my toes properly (foot drop). I cannot walk on my heels at all. I frequently stumble on uneven ground. I have dropped objects because my grip has failed unexpectedly.' Quantify limitations: 'I can walk no more than 100 feet before my leg gives out.'

Example: On my worst days, my left leg feels completely weak and unreliable. I have had my knee buckle without warning while walking, causing me to fall twice in the past year. I cannot go up or down stairs without holding a railing with both hands. I cannot carry anything in my left hand while walking because I need the railing for support.

Examiner listens for: Specific functional limitations tied to motor deficits (foot drop, inability to toe/heel walk, grip failure, buckling), history of falls attributable to weakness, and whether the weakness worsens with repetitive use or prolonged activity (DeLuca factors).

Avoid: Do not say 'I'm a little weak' without being specific. Do not omit falls history - falls from neurological weakness are critical evidence. Do not minimize fatigue-related weakness: if muscles fail after repeated use, that is a DeLuca factor that must be documented.

Sensory Deficits (Numbness, Tingling, Paresthesias)

How to describe it: Map exactly where you have abnormal sensation. 'The entire outer portion of my left calf and the top of my left foot is numb constantly. My toes tingle like they are asleep 24 hours a day. When anything touches the bottom of my foot, it feels like a burning pain rather than normal pressure - I cannot wear a regular shoe because of this hypersensitivity.' Distinguish between numbness (reduced sensation) and paresthesias (abnormal sensations like tingling, burning) and allodynia (pain from normally non-painful stimuli).

Example: On my worst days, the numbness extends from my lower back all the way to my toes. I cannot feel the floor under my left foot properly, which causes me to be unsteady and I have to look at my feet when walking to know where they are. I have burned myself on the left foot because I could not feel the temperature.

Examiner listens for: Sensory loss in a dermatomal or peripheral nerve distribution pattern, distinction between different types of sensory abnormality (hypoesthesia vs. paresthesia vs. allodynia vs. hyperalgesia), and whether sensory loss affects safety and function (inability to detect heat, cuts, pressure).

Avoid: Do not say simply 'my leg feels numb' - map it precisely. Do not confuse central numbness (diffuse, stocking-glove) with dermatomal numbness - for radiculopathy, the examiner needs to hear a dermatomal pattern. Do not omit safety incidents caused by sensory loss.

Flare-Ups

How to describe it: Describe what triggers flare-ups, how often they occur, how long they last, and how they are different from your baseline symptoms. 'My baseline pain is a 5/10 burning in my left leg. About 3 times per week, I have flare-ups triggered by sitting for more than 20 minutes, bending, or lifting anything over 10 pounds. During a flare, the pain spikes to 9/10, I cannot walk, and I must lie down for 2-4 hours. These flare-ups last up to 12 hours and require me to take additional pain medication.'

Example: During my worst flare-up last month, I was completely unable to get out of bed for 3 days. The pain was so severe that I could not shower, cook, or care for myself. My wife had to bring me meals in bed. I needed to use a cane for an additional two weeks after the flare resolved before returning to my baseline.

Examiner listens for: Frequency of flare-ups, severity during flare-ups compared to baseline, functional incapacitation during flare-ups, triggering activities, and duration of recovery. The examiner is specifically instructed to consider flare-ups under DeLuca factors when assessing functional loss.

Avoid: Do not describe only your good days or current status at the exam. Explicitly tell the examiner: 'I am describing my worst days and my typical flare-ups, not how I feel right now.' Do not omit the functional impact during flare-ups - incapacitation during flare-ups is critical for rating.

Functional Impact on Daily Life, Work, and Sleep

How to describe it: Connect symptoms directly to specific functional limitations. Be concrete and quantitative. 'I cannot sit for more than 20 minutes without needing to stand and move. I cannot drive more than 15 minutes. I cannot walk more than 2 blocks. I sleep only 3-4 hours per night because pain wakes me. I had to leave my job as a [occupation] because I cannot stand for 8 hours. I can no longer play with my grandchildren or participate in hobbies I used to enjoy.'

Example: My worst days - which occur 2-3 times per week - I am unable to leave the house. I cannot complete basic household tasks like laundry or vacuuming. My spouse has taken over grocery shopping entirely. I have canceled medical and social appointments because the pain was too severe to travel. My condition has caused significant anxiety and depression because of what I have lost.

Examiner listens for: The examiner is specifically required to document impact on occupational and daily function for the DBQ field regarding functional impact of peripheral nerve conditions. They need specific activities you cannot do, not general statements.

Avoid: Do not say 'I just take it easy.' Do not omit occupational history - if you changed jobs, reduced hours, or retired early due to this condition, say so explicitly. Do not forget sleep disturbance - this is a commonly overlooked functional impact that belongs in the record.

Assistive Device Use

How to describe it: Specify every assistive device you use and how often. 'I use a single-point cane every time I leave the house. I wear an ankle-foot orthosis (AFO) brace on my left leg daily to prevent foot drop and tripping. I have a shower chair because I cannot stand long enough to shower safely. My doctor prescribed the cane and brace - I have the prescription.' The DBQ specifically documents wheelchair, crutches, canes, walkers, and braces - mention all that apply.

Example: During a flare, I use two crutches or my walker instead of my cane. I have been advised by my doctor to use a wheelchair for any trip requiring walking more than 100 feet. I currently own and use a wheelchair for VA appointments and grocery shopping.

Examiner listens for: Formal prescription for assistive devices, type and frequency of use, whether devices are medically prescribed or self-initiated, and whether device use reflects the true level of disability.

Avoid: Do not leave assistive devices at home the day of the exam if you genuinely use them - arrive with the device you typically use. Do not fail to mention a device because you did not bring it. Mention any device prescribed by any physician, including private providers.