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Quizzes > Quizzes for Business > Healthcare

Muscle Innervation Quiz: Challenge Your Nerves

Explore Nerve Supply Patterns in Muscles

Difficulty: Moderate
Questions: 20
Learning OutcomesStudy Material
Colorful paper art depicting elements related to Muscle Innervation Quiz.

Embark on a brain-teasing nerve supply quiz to reinforce your neuroanatomy skills. This Muscle Innervation Quiz offers practical scenarios covering major motor nerves and their muscle targets. It's perfect for medical students, anatomy enthusiasts, and educators aiming to evaluate or refresh their understanding of muscle innervation. After taking it, explore related challenges like the Muscle Anatomy Knowledge Quiz and the Lower Limb Muscle Anatomy Quiz, or dive into the Muscle Physiology Knowledge Test for a comprehensive review. Feel free to tweak every question in our quizzes editor to match your study style.

Which nerve primarily innervates the biceps brachii muscle?
Ulnar nerve
Median nerve
Musculocutaneous nerve
Radial nerve
The biceps brachii is innervated by the musculocutaneous nerve, which arises from the lateral cord of the brachial plexus (C5 - C7). This nerve controls elbow flexion and forearm supination.
Which nerve innervates the triceps brachii muscle?
Radial nerve
Musculocutaneous nerve
Axillary nerve
Median nerve
The triceps brachii is innervated by the radial nerve, which courses in the radial groove of the humerus. This nerve controls extension at the elbow joint.
The quadriceps femoris group is innervated by which nerve?
Obturator nerve
Tibial nerve
Femoral nerve
Sciatic nerve
The quadriceps femoris muscles are innervated by the femoral nerve (L2 - L4). This nerve supplies the anterior compartment of the thigh and mediates knee extension.
Which nerve supplies the gastrocnemius muscle?
Common fibular nerve
Femoral nerve
Tibial nerve
Obturator nerve
The gastrocnemius is innervated by the tibial nerve, a branch of the sciatic nerve. It controls plantarflexion of the foot at the ankle.
Which nerve innervates the deltoid muscle?
Axillary nerve
Suprascapular nerve
Musculocutaneous nerve
Radial nerve
The deltoid muscle is innervated by the axillary nerve (C5 - C6) as it passes through the quadrangular space. This nerve enables shoulder abduction.
The biceps reflex mainly tests which spinal nerve roots?
C7 - C8
C5 - C6
C4 - C5
C6 - C7
The biceps reflex evaluates the function of the C5 - C6 spinal nerve roots via the musculocutaneous nerve. A normal response is elbow flexion.
Injury to the surgical neck of the humerus commonly damages which nerve?
Ulnar nerve
Axillary nerve
Median nerve
Radial nerve
The axillary nerve wraps around the surgical neck of the humerus. Injury here causes deltoid paralysis and loss of shoulder abduction.
Which nerve innervates the extensor digitorum muscle in the forearm?
Ulnar nerve
Musculocutaneous nerve
Median nerve
Radial nerve
The radial nerve and its posterior interosseous branch innervate the extensor digitorum, enabling finger extension.
The deep branch of which nerve supplies tibialis anterior?
Superficial fibular nerve
Deep fibular nerve
Saphenous nerve
Tibial nerve
The deep fibular (peroneal) nerve innervates tibialis anterior, which dorsiflexes and inverts the foot.
Which nerve provides sensory innervation to the medial aspect of the leg?
Deep fibular nerve
Superficial fibular nerve
Sural nerve
Saphenous nerve
The saphenous nerve, a branch of the femoral nerve, supplies cutaneous sensation to the medial leg down to the foot.
Which muscle is innervated by the obturator nerve?
Pectineus
Gluteus medius
Adductor longus
Sartorius
Adductor longus is supplied by the obturator nerve (L2 - L4) and is a primary hip adductor. Pectineus is by femoral nerve and gluteus medius by superior gluteal nerve.
A patient presents with foot drop. Which nerve is most likely injured?
Saphenous nerve
Deep fibular nerve
Tibial nerve
Sural nerve
Foot drop results from loss of dorsiflexion, typically due to deep fibular nerve injury affecting tibialis anterior and other dorsiflexors.
The median nerve innervates all of the following except:
Flexor carpi ulnaris
Pronator teres
Flexor digitorum superficialis
Thenar muscles
Flexor carpi ulnaris is innervated by the ulnar nerve, while the other listed muscles are supplied by the median nerve.
Scapular winging on pushing against a wall is most often due to injury to which nerve?
Long thoracic nerve
Dorsal scapular nerve
Thoracodorsal nerve
Spinal accessory nerve
Injury to the long thoracic nerve impairs serratus anterior, causing the medial border of the scapula to protrude (winging).
Which spinal nerve roots form the lumbosacral trunk?
L5 - S1
L2 - L3
L4 - L5
L3 - L4
The lumbosacral trunk is formed by part of L4 joining L5, carrying fibers into the sacral plexus.
Which nerve innervates the medial portion of the flexor digitorum profundus (to digits 4 and 5)?
Median nerve
Radial nerve
Musculocutaneous nerve
Ulnar nerve
The medial half of flexor digitorum profundus (digits 4 - 5) is innervated by the ulnar nerve (C8 - T1), while the lateral half is by the anterior interosseous branch of the median nerve.
Which nerve branch specifically innervates the short head of biceps femoris?
Femoral nerve
Tibial nerve
Common fibular nerve
Obturator nerve
The short head of biceps femoris is innervated by the common fibular (peroneal) division of the sciatic nerve, whereas the long head is by the tibial division.
Which anterior thigh muscle is innervated by the femoral nerve but carries fibers only from L2 - L3?
Rectus femoris
Sartorius
Vastus medialis
Iliopsoas
Sartorius is innervated by the femoral nerve with roots L2 - L3 only. Other quadriceps components have additional L4 contribution.
Pectoralis major receives its dual innervation from which nerves?
Ulnar and median nerves
Dorsal scapular and suprascapular nerves
Long thoracic and thoracodorsal nerves
Medial and lateral pectoral nerves
Pectoralis major is innervated by both the lateral pectoral nerve (C5 - C7) and medial pectoral nerve (C8 - T1), reflecting its broad origin.
In Erb - Duchenne palsy (upper brachial plexus injury at C5 - C6), which movement is predominantly lost?
Hip flexion
Wrist extension
Elbow flexion
Finger abduction
Erb - Duchenne palsy affects C5 - C6 roots, impairing musculocutaneous function and thus elbow flexion. Shoulder abduction is also weakened.
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Learning Outcomes

  1. Identify major motor nerves innervating upper and lower limb muscles.
  2. Analyse the relationship between nerve roots and muscle function.
  3. Apply knowledge of innervation patterns to clinical scenarios.
  4. Evaluate variations in nerve supply across different muscle groups.
  5. Master key terminology related to muscle innervation pathways.
  6. Demonstrate understanding of segmental innervation mapping.

Cheat Sheet

  1. Master Major Motor Nerves - Imagine the radial, ulnar, and femoral nerves as bustling highways delivering movement commands to your limbs. Trace their winding routes from the spinal cord to specific muscles, and watch how each nerve lights up your ability to extend, grip, and kick. Solidifying this roadmap will have you diagnosing nerve-related muscle actions like a pro in no time. Peripheral Muscle Innervation Overview
    2. neurologyneeds.com
  2. Decode Nerve Root - Muscle Connections - Dive into the brachial and lumbosacral plexuses and discover how specific spinal nerve roots team up to power your arms and legs. Mapping these root-to-muscle pairings will turn complex charts into a clear roadmap you can recall on the fly. This skill is your secret weapon for pinpointing segmental innervation in clinical scenarios. Ultimate Muscle Innervation Chart
    3. ptprogress.com
  3. Tackle Clinical Case Studies - Practice makes perfect, so jump into real-world scenarios involving radial or sciatic nerve injuries. Analyzing these cases sharpens your ability to spot deficits, predict affected movements, and suggest targeted treatments. Before you know it, you'll be talking like a seasoned clinician. Spinal Nerves & Muscle Innervation Flash Cards
    4. quizlet.com
  4. Compare Innervation Variations - Don't stop at a single example - compare how similar muscles in the upper and lower limbs get their nerve supply. Spotting these subtle differences solidifies your overall anatomical smarts and helps you anticipate variations in patient presentations. It's like spotting every twist and turn on a map! Peripheral Muscle Innervation Overview
    5. neurologyneeds.com
  5. Learn Key Terminology - Arm yourself with words like "motor unit," "neuromuscular junction," and "nerve plexus" so you can speak the language of movement without missing a beat. A rock-solid vocabulary boosts your confidence in exams and on the wards. Plus, it makes studying feel more like unlocking a secret code! Ultimate Muscle Innervation Chart
    6. ptprogress.com
  6. Master Dermatomes & Myotomes - Break out your maps and pinpoint each dermatome and myotome like a topographer charting new territory. This hands-on practice is crucial for assessing nerve function and diagnosing neurological conditions. You'll feel unstoppable when you can name the map regions blindfolded! Spinal Nerves & Muscle Innervation Flash Cards
    7. quizlet.com
  7. Use Creative Mnemonics - Turn dry lists into memorable jingles with tricks like "Lateral Less, Medial More" for pectoral nerves or the "BEST" muscles for radial nerve actions. Mnemonics are your cheat codes to quick recall during intense quizzes and clinical rotations. Soon, you'll be humming your way through innervation patterns! Pectoral Nerve Mnemonic
    8. epomedicine.com
  8. Explore the Brachial Plexus - Unravel the brachial plexus like a mystery novel - study its five roots, three trunks, six divisions, three cords, and five terminal branches. Visual diagrams and active tracing of each branch make this web of nerves feel like second nature. Mastering this will save you from getting tangled up in exams! Shoulder & Plexus Simplified
    9. epomedicine.com
  9. Review Shoulder Muscle Innervation - Zoom in on the deltoid, supraspinatus, infraspinatus, teres minor, and subscapularis - learn which nerves power each shoulder stabilizer. Understanding these connections is key to diagnosing rotator cuff and shoulder nerve injuries with confidence. It's like giving your shoulder a detailed blueprint! Shoulder & Plexus Simplified
    10. epomedicine.com
  10. Quiz Yourself on Radial Nerve Muscles - Use the "BEST" mnemonic - Brachioradialis, Extensors, Supinator, Triceps - to instantly recall radial nerve targets. Flashcards, sketches, or quick quizzes are perfect ways to lock this in. Soon you'll point to each muscle and name it before your coffee even kicks in! Radial Nerve Mnemonic
    11. theworldofanatomy.wordpress.com
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