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C&P Exam Prep: Muscle Group VIII Injury (Forearm Extensors)

DC 5308 musculoskeletal 38 CFR 4.73

DBQ Overview

Interview + Physical
Form Name
Muscle_Injuries
Form Code
Muscle_Injuries
Page Count
12
Examiner Type
Orthopedic Surgeon, Physiatrist, or appropriate clinician
Estimated Duration
30-60 minutes
Exam Format
Interview + Physical

What to Expect During Your Exam

Exam Overview

To evaluate the nature, severity, and functional impact of an injury to Muscle Group VIII - the extensors of the wrist, fingers, and thumb in the forearm - for VA disability rating purposes under Diagnostic Code 5308 and 38 CFR 4.73.

What the examiner evaluates:

  • Identification and confirmation of the affected muscle group (Group VIII: extensor carpi radialis longus/brevis, extensor digitorum, extensor digiti minimi, extensor carpi ulnaris, extensor pollicis longus/brevis, abductor pollicis longus, extensor indicis)
  • Severity of injury: slight, moderate, or severe
  • Active and passive range of motion of the wrist (extension and flexion) and finger/thumb extension
  • Grip strength and pinch strength
  • Muscle strength testing using 0-5 scale (MRC grading) for wrist extension, finger extension, and thumb extension
  • Evidence of muscle atrophy, loss of muscle substance, soft or flabby muscles, or induration
  • Scar characteristics: minimal, entrance/exit, ragged/depressed/adherent, adhesion to bone
  • Loss of deep fascia or impairment of muscle tonus
  • Functional signs: weakness, loss of power, lowered threshold of fatigue, impaired coordination, uncertainty of movement
  • DeLuca factors: pain on use, fatigue after use, weakness during repetitive use, incoordination, flare-up frequency and severity
  • Impact on occupational and daily activities
  • Dominant hand identification
  • Presence of retained foreign bodies or shrapnel (x-ray evidence)
  • Whether the condition affects the upper extremity (right, left, or bilateral)

Exam will include both an interview portion reviewing your history and symptoms and a physical examination of the affected forearm and upper extremity. The examiner will observe you performing wrist and finger movements. Bring any splints, wrist braces, or assistive devices you regularly use. Be prepared for the examiner to assess both the affected and unaffected sides for comparison measurements of atrophy or circumference.

Typical duration: 30-60 minutes

Wrist Extension Range of Motion

Active and passive degrees of wrist dorsiflexion (extension), which is the primary functional movement of Muscle Group VIII. Normal is approximately 70 degrees.

What to expect:

The examiner will ask you to extend your wrist upward (palm down, raise the back of the hand). They will use a goniometer to measure the angle achieved. This will be performed actively (you move it) and passively (examiner moves it). Any pain, guarding, or early cessation will be noted.

Key thresholds:

  • Normal wrist extension ~70- — Baseline reference; significant reduction supports higher ratings
  • Marked limitation of extension — Supports moderate to severe muscle injury rating
  • Complete loss of active extension (wrist drop) — Supports severe rating under DC 5308

Tips:

  • Perform the movement as you would on your worst day - do not push through severe pain to demonstrate maximum range
  • Tell the examiner immediately if the movement causes pain, and describe the pain location and intensity (0-10 scale)
  • If your wrist extension worsens after repeated movements or later in the day, tell the examiner this explicitly
  • Request that the examiner document both the initial and post-repetition ROM if it worsens with use

Pain considerations: Pain that limits wrist extension before the anatomical end range is a DeLuca factor that must be considered by the examiner. State clearly: 'My wrist extension is limited further by pain before I reach my maximum range, and the pain worsens significantly with repetitive use or after prolonged activity.'

Finger and Thumb Extension Strength (MRC 0-5 Scale)

Manual muscle testing of the finger extensors (extensor digitorum, extensor digiti minimi, extensor indicis) and thumb extensors/abductor (extensor pollicis longus, extensor pollicis brevis, abductor pollicis longus). The 0-5 MRC scale rates: 5=Normal, 4=Active movement against resistance but reduced, 3=Active movement against gravity only, 2=Active movement with gravity eliminated, 1=Visible/palpable contraction only, 0=No contraction.

What to expect:

The examiner will ask you to extend your fingers and thumb against their hand resistance. They will observe for lag, asymmetry, or inability to hold against gravity. The DBQ records this for both right and left, and for wrist extension, elbow, and other joints.

Key thresholds:

  • Grade 5 (5/5) - Normal strength — Would not support significant disability rating based on strength alone
  • Grade 4 (4/5) - Reduced but functional — Supports slight to moderate rating; note functional impact
  • Grade 3 (3/5) - Against gravity only — Supports moderate injury rating; significant functional impairment
  • Grade 2 or below - Severely reduced — Supports severe rating; major loss of function

Tips:

  • Perform at your actual current functional level - do not strain to achieve a higher grade
  • Note if strength is significantly worse after repetitive activity (DeLuca fatigue factor)
  • If your grip or pinch is affected by the extensor weakness, describe how (e.g., inability to release objects, dropping items)
  • Mention that your strength is representative of a typical day, and that on bad days or after use it is even lower

Pain considerations: Pain during strength testing is a legitimate finding. Say: 'I am experiencing significant pain when I resist with my fingers/thumb, and this pain limits how hard I can push. My effective strength on a bad day or after activity is lower than what I can demonstrate right now.'

Wrist Flexion Range of Motion (Comparison)

Active and passive wrist palmar flexion (normal ~80 degrees). This is measured in conjunction with extension to document overall wrist function and whether adaptive contraction of the opposing flexors (Group VII) has occurred.

What to expect:

The examiner will ask you to bend your wrist down (palm toward forearm). This is measured both to assess overall wrist function and to identify any adaptive shortening of the flexors due to chronic extensor weakness.

Key thresholds:

  • Adaptive contraction of opposing muscle group (flexors) — Indicates functional imbalance; supports moderate to severe rating

Tips:

  • If you notice tightness or increased resistance when bending your wrist, report it
  • Mention if your flexors feel tight or have changed in feel since your injury - this may indicate adaptive contraction

Pain considerations: If wrist flexion also causes pain due to the extensor injury (e.g., stretching the injured muscles), report this during the exam.

Forearm Circumference Measurement (Atrophy Assessment)

Circumferential measurement of the forearm at a standardized landmark, compared bilaterally. A difference of 2 cm or more generally indicates clinically significant atrophy of the forearm musculature.

What to expect:

The examiner will measure both forearms with a measuring tape at the same anatomical point. The affected side is compared to the unaffected side. Results are recorded in the DBQ fields for normal-side and atrophied-side measurements.

Key thresholds:

  • -1 cm asymmetry — Early indicator of atrophy
  • -2 cm asymmetry — Clinically significant atrophy supporting moderate to severe rating

Tips:

  • Atrophy may be visible as a noticeable thinning or hollowing of the dorsal forearm - point this out if present
  • If you have noticed your forearm looks smaller or feels weaker on the injured side, state this explicitly
  • If the examiner does not perform this measurement, politely ask them to document the circumference of both forearms

Pain considerations: Atrophy is an objective finding that does not require pain reporting, but note that the atrophy is related to disuse due to pain and functional loss.

Repetitive Use / Endurance Testing (DeLuca Factors)

Whether range of motion, strength, or function deteriorates after repetitive use of the forearm extensors. This is a critical DeLuca factor and must be documented by the examiner.

What to expect:

The examiner may ask you to perform repetitive wrist extension movements. If they do not, you should proactively describe how your function changes after sustained or repetitive activity.

Key thresholds:

  • Measurable ROM decrease after repetition — Must be recorded and considered in rating; often reflects true functional level
  • Increased pain after repetition — Supports higher rating; reflects real-world functional limitation

Tips:

  • Tell the examiner: 'My wrist extension is much worse after I use my arm for more than a few minutes. By the end of the day I may have [describe specific loss].'
  • Describe the time frame for fatigue onset - 'After 10-15 repetitive wrist movements I notice significant weakness and burning pain'
  • Explain how this affects your ability to work, drive, type, or perform self-care activities

Pain considerations: The DeLuca standard requires the examiner to consider fatigue, weakness, and pain on use in addition to a single static measurement. If the examiner only takes one ROM reading, respectfully note: 'I would like it documented that my function worsens significantly with repetitive use, per VA guidelines.'

Estimate

Rating Criteria Breakdown

40% Severe injury to Muscle Group VIII. Complete or near-complet ...

Severe injury to Muscle Group VIII. Complete or near-complete loss of wrist and finger extension function (wrist drop or functional equivalent). Profound muscle atrophy, major loss of muscle substance, palpable loss of deep fascia, induration or atrophy of an entire muscle, muscles that swell and harden abnormally in contraction. Adhesion of scar to bone. Extreme functional loss affecting all fine motor and grip activities.

Key Symptoms

  • Complete or near-complete loss of active wrist extension (wrist drop)
  • Severe weakness of finger and thumb extension (MRC grade 0-2)
  • Profound visible or measurable forearm atrophy
  • Palpation shows loss of deep fascia
  • Induration or atrophy of an entire muscle following historical injury
  • Muscles swell and harden abnormally in contraction
  • Adhesion of scar to one of the long bones
  • Major loss of muscle substance
  • Complete inability to perform fine motor tasks requiring extension
  • Severe impairment of coordination and uncertainty of movement
  • Atrophy of muscle groups not in the track of the missile (partial denervation pattern)

CFR: Under 38 CFR 4.73, DC 5308, severe injury involves virtually complete loss of function of the extensor muscle group with extensive objective findings including atrophy, fascia loss, bone adhesion, and inability to perform occupational tasks requiring wrist or finger extension.

30% Moderately severe injury to Muscle Group VIII. Marked weakne ...

Moderately severe injury to Muscle Group VIII. Marked weakness of wrist and finger extension. Visible or measurable muscle atrophy. Ragged, depressed, or adherent scars indicating wide tissue damage. Impairment of coordination or uncertainty of movement. Significant impact on occupational and daily activities.

Key Symptoms

  • Marked weakness of wrist extension (MRC grade 2-3)
  • Significant limitation of wrist and/or finger extension ROM
  • Visible or measurable forearm atrophy
  • Ragged, depressed, or adherent scars indicating wide damage
  • Adaptive contraction of opposing muscle group (forearm flexors)
  • Impairment of coordination affecting fine motor tasks
  • Uncertainty of movement during fine motor activities
  • Significant loss of power
  • Atrophy of muscle groups in the track of the injury
  • Tests of endurance show marked inferiority compared to unaffected side

CFR: Under 38 CFR 4.73, DC 5308, moderately severe injury is supported by objective findings of atrophy, marked weakness, adherent scarring, and significant functional impairment that materially impacts employment and self-care.

20% Moderate injury to Muscle Group VIII. Demonstrable weakness ...

Moderate injury to Muscle Group VIII. Demonstrable weakness or limitation of wrist and/or finger extension. May include some loss of muscle substance, impaired muscle tonus, soft or flabby muscles in the affected area, or entrance/exit scars indicating a track of injury. Functional limitation affects occupational activities.

Key Symptoms

  • Moderate limitation of wrist extension
  • Weakness of finger or thumb extension (MRC grade 3-4)
  • Some loss of muscle substance or impaired muscle tonus
  • Soft or flabby muscles in the wound area
  • Lowered threshold of fatigue with repetitive forearm use
  • Entrance and/or exit scars present
  • Some loss of deep fascia
  • Measurable decrease in ROM with repetitive use
  • Impaired grip due to extensor weakness

CFR: Under 38 CFR 4.73, DC 5308, a moderate injury reflects demonstrable functional impairment with objective findings including weakness, altered muscle quality, or scarring consistent with significant tissue damage.

10% Slight injury to Muscle Group VIII. Injury is well-healed wi ...

Slight injury to Muscle Group VIII. Injury is well-healed with minimal residuals. Some scar tissue, minimal functional deficit, no significant weakness or atrophy. Minor functional impairment that does not substantially limit occupational or daily activities.

Key Symptoms

  • Minimal or well-healed scars
  • Slight limitation of wrist extension or finger extension
  • Mild weakness with minimal impact on daily activities
  • No significant atrophy
  • Minimal loss of power with repetitive use

CFR: Under 38 CFR 4.73, DC 5308, a slight injury involves wounds that heal without substantial residual. Minimal functional impact is the hallmark of this tier.

How to Describe Your Symptoms

Wrist Extension Weakness and Loss of Function

How to describe:

Describe the specific functional tasks you can no longer perform or that are significantly harder due to weakness in wrist and finger extension. Be specific: 'I cannot hold my wrist up when typing, I drop things because my fingers do not extend fully, I cannot pour from a container without significant pain and trembling.' Quantify: 'I can lift no more than [X] pounds before my wrist buckles.'

Worst-day example:

“On my worst days, I cannot extend my wrist at all against gravity. My wrist drops when I try to use my hand, I cannot open jars or doors, I cannot type for more than 2 minutes without severe burning pain and my wrist giving way. I wake up and my forearm is stiff for over an hour before I can attempt any fine motor task.”

What the examiner listens for:

Specific functional limitations tied to the extensor muscle group. The examiner is looking for whether your description is consistent with your objective findings, and whether you are connecting the weakness to specific daily and occupational tasks.

Understatements to avoid:

Saying 'it's a little weak' or 'I manage okay' when in fact you have significantly modified how you perform tasks. Do not minimize compensation strategies - explain that you have changed how you do things BECAUSE the injury limits you, not because the injury is minor.

Pain with Forearm Extensor Use

How to describe:

Describe where exactly the pain is located (dorsal forearm, wrist, specific finger extensors), what triggers it (wrist extension, gripping, lifting with the palm down, repetitive motion), how quickly pain onset occurs, and what the pain feels like (burning, aching, sharp, stabbing). Use a 0-10 scale and distinguish resting pain from activity pain.

Worst-day example:

“On my worst days the pain starts immediately when I try to extend my wrist or fingers. Even at rest I have a constant 5/10 deep aching along the back of my forearm. Any activity that requires extending my wrist - typing, lifting, even gesturing - causes immediate 8-9/10 sharp pain that forces me to stop within seconds.”

What the examiner listens for:

Consistency of pain description with the anatomy of Muscle Group VIII, pain that limits ROM and strength testing, and pain that occurs with use versus at rest. The examiner should note if pain causes early cessation of ROM testing.

Understatements to avoid:

Saying 'it hurts sometimes' when pain is present every single day. Do not rate your pain based on what you think is acceptable to complain about - rate it based on your actual experience. Do not perform movements fully through severe pain just to appear cooperative.

Fatigue and Lowered Endurance

How to describe:

Explain how quickly your forearm extensors fatigue with use, how long recovery takes, and how fatigue affects your ability to complete tasks. For example: 'After typing for 5 minutes my extensor muscles feel like they are on fire and I cannot continue. I need to rest for 30 minutes before I can attempt it again.'

Worst-day example:

“On my worst days, my forearm fatigues within 2-3 minutes of any task requiring wrist extension. After that, I have a burning, heavy sensation along the back of my forearm that lasts for hours. I cannot complete basic tasks like washing dishes, preparing food, or using a computer without multiple rest breaks of 15-30 minutes.”

What the examiner listens for:

The DeLuca fatigue factor - whether the examiner can document that your function decreases with repetitive use. Also looking for how fatigue affects occupational activities (typing, tool use, lifting, driving).

Understatements to avoid:

Failing to mention fatigue at all because you have adapted to it. Many veterans have lived with this limitation so long they consider it normal. It is not normal - it is a ratable impairment. Specifically describe how fatigue has changed your life compared to before the injury.

Fine Motor Impairment and Coordination Loss

How to describe:

Describe difficulty with tasks requiring precise finger extension: buttoning clothing, picking up small objects, typing, handwriting, tool use. Explain if your movements feel uncertain or if you have dropped objects or misjudged distances due to extensor weakness.

Worst-day example:

“On my worst days I cannot button a shirt with the affected hand. I drop objects I am trying to release. My handwriting is illegible because I cannot control my finger extension. Using a keyboard causes immediate pain and my fingers lag when I try to lift them for the next keystroke.”

What the examiner listens for:

Evidence of impairment of coordination and uncertainty of movement - specific DBQ checklist items under the moderately severe rating tier. These findings must be documented by the examiner.

Understatements to avoid:

Dismissing coordination problems as 'just clumsiness.' If you are dropping things, struggling with fine motor tasks, or experiencing jerky or uncertain movements in the affected hand, these are objective functional deficits that the examiner must document.

Scar Characteristics and Physical Changes

How to describe:

Describe your scars accurately: their location (dorsal forearm, wrist), size (length and width in centimeters if known), whether they are adherent to underlying tissue or bone, whether they are depressed below skin level, whether they cause pain or restricted movement when touched or stretched.

Worst-day example:

“My scar on the dorsal forearm is approximately [X] cm long. It is adherent to the underlying tissue - I can feel it pull when I extend my wrist. The scar is depressed and the skin around it feels numb but also hypersensitive when pressed. On days when my forearm is swollen, the scar tightens and significantly limits my wrist extension further.”

What the examiner listens for:

The specific scar classification that drives rating criteria: minimal scars, small linear scars, ragged/depressed/adherent scars, or adhesion to bone. Each type corresponds to a different severity level on the DBQ.

Understatements to avoid:

Saying 'just a scar' when the scar is actually adherent, depressed, or causing functional limitation. The examiner must accurately classify your scar type - ensure they examine it carefully and you describe any tethering or restriction it causes.

Impact on Occupational and Daily Activities

How to describe:

Specifically connect your symptoms to your work and daily life. Name specific job tasks affected, specific self-care activities affected, and any accommodations or modifications you have made. If you have changed careers, reduced work hours, or been unable to work due to this condition, state that directly.

Worst-day example:

“On my worst days I cannot perform my job duties, which require [typing/lifting/tool use/manual labor]. I have had to ask coworkers to perform tasks I cannot do. I cannot perform basic self-care independently - dressing, food preparation, and personal hygiene are significantly impaired or painful. I have missed [X] days of work over the past year due to this condition.”

What the examiner listens for:

The DBQ asks specifically about the impact of the muscle injury on occupation and daily activities. The examiner needs concrete examples to populate this field accurately.

Understatements to avoid:

Saying 'I get by' or 'I manage' without explaining HOW you manage - often with compensatory strategies, assistance from others, avoidance of activities, or medication. These adaptations are evidence of functional impairment, not evidence that you are unimpaired.

Common Mistakes to Avoid

Prep Checklist

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Before Your Exam

Day Of

During the Exam

After the Exam

Your Rights During a C&P Exam

  • You have the right to a thorough and contemporaneous examination that accurately reflects your current disability. An inadequate exam can be challenged under Barr v. Nicholson (21 Vet. App. 303, 2007).
  • You have the right to have DeLuca factors considered: pain on use, fatigue on use, weakness on use, incoordination, and flare-up severity must be documented and considered in your rating per DeLuca v. Brown (8 Vet. App. 202, 1995).
  • You have the right to submit your own medical evidence, lay statements, and buddy statements to supplement or challenge the C&P exam findings.
  • You have the right to request a copy of the completed DBQ after your examination through your VA medical records.
  • You have the right to record your C&P examination in most jurisdictions - verify your state's consent laws before recording. Notify the examiner if you choose to record.
  • You have the right to request a new C&P examination if the original exam was inadequate, failed to consider all symptoms, or was not conducted by a clinician with appropriate expertise in musculoskeletal conditions.
  • You have the right to be examined in person unless you have consented to a records-only or telehealth examination. The DBQ must document whether the exam was conducted in person.
  • You are protected by the benefit of the doubt standard (38 CFR 3.102): when the evidence is in approximate balance, the decision must be made in your favor.
  • You have the right to submit a Notice of Disagreement (VA Form 10182) if you disagree with the rating decision, and to request a Higher-Level Review or Board of Veterans' Appeals hearing.
  • You have the right to representation by an accredited VA claims agent, attorney, or Veterans Service Organization (VSO) representative at no cost at the claims stage.

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This C&P exam preparation guide is for educational purposes only and does not constitute legal, medical, or claims advice. Always consult with a qualified Veterans Service Organization (VSO) representative or VA-accredited attorney for guidance specific to your claim. Never exaggerate, minimize, or fabricate symptoms during a C&P examination.