Questions and Answers
Which muscle is primarily innervated by the median nerve?
Which muscle is innervated by the ulnar nerve?
Which muscle is innervated by the deep radial nerve?
What nerve innervates the Flexor Digitorum Profundus?
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Which of these muscles is NOT innervated by the posterior interosseous nerve?
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Which muscle is innervated by the anterior interosseous nerve?
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Which muscle is innervated by the ulnar nerve?
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Which of the following muscles is NOT innervated by the radial nerve?
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What innervation does the Supinator muscle receive?
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Which muscle is responsible for extension at the wrist and is innervated by the posterior interosseous nerve?
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Which of the following muscles is primarily a pronator of the forearm?
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Study Notes
Anterior Forearm Muscles
- The Pronator teres is innervated by the Median nerve, facilitating pronation of the forearm.
- The Flexor carpi radialis, also innervated by the Median nerve, aids in wrist flexion and abduction.
- Palmaris longus receives its innervation from the Median nerve and helps with wrist flexion.
- Flexor carpi ulnaris is distinguished by innervation from the Ulnar nerve, contributing to wrist flexion and adduction.
- Flexor digitorum superficialis, innervated by the Median nerve, flexes the middle phalanges of the fingers.
- Flexor digitorum profundus has dual innervation from the Anterior Interosseous nerve and the Ulnar nerve, allowing for flexion of the distal phalanges.
- Pronator quadratus, primarily innervated by the Anterior Interosseous nerve, is a key muscle in pronating the forearm.
- Flexor pollicis longus, also innervated by the Anterior Interosseous nerve, flexes the thumb.
Posterior Forearm Muscles
- Anconeus is innervated by the Radial nerve and assists with elbow extension.
- Brachioradialis, receiving innervation from the Radial nerve, flexes the elbow when in a mid-prone position.
- Extensor carpi radialis longus, also innervated by the Radial nerve, extends and abducts the wrist.
- Extensor carpi radialis brevis is innervated by the Deep Radial nerve, aiding in wrist extension.
- Supinator, originating from the Arcade of Frohse, is innervated by the Deep Radial nerve, performing supination of the forearm.
- Extensor digitorum, innervated by the Posterior Interosseous nerve, extends the fingers.
- Extensor digiti minimi, also supplied by the Posterior Interosseous nerve, specifically extends the little finger.
- Extensor carpi ulnaris receives innervation from the Posterior Interosseous nerve, contributing to wrist extension and adduction.
- Extensor indicis, innervated by the Posterior Interosseous nerve, extends the index finger.
- Abductor pollicis longus is provided by the Posterior Interosseous nerve, allowing for thumb abduction.
- Extensor pollicis brevis is also innervated by the Posterior Interosseous nerve, extending the proximal phalanx of the thumb.
- Extensor pollicis longus, innervated by the Posterior Interosseous nerve, extends the distal phalanx of the thumb.
Anterior Forearm Muscles
- Comprised of eight primary muscles responsible for flexion and pronation.
- Pronator teres: Innervated by the median nerve; aids in pronation of the forearm.
- Flexor carpi radialis: Innervated by the median nerve; flexes and abducts the wrist.
- Palmaris longus: Innervated by the median nerve; assists in flexing the wrist.
- Flexor carpi ulnaris: Innervated by the ulnar nerve; flexes and adducts the wrist.
- Flexor digitorum superficialis: Innervated by the median nerve; flexes the middle phalanges of the fingers.
- Flexor digitorum profundus: Dual innervation from the anterior interosseous and ulnar nerves; flexes the distal phalanges of the fingers.
- Pronator quadratus: Innervated by the anterior interosseous nerve; helps with pronation of the forearm.
- Flexor pollicis longus: Innervated by the anterior interosseous nerve; flexes the thumb.
Posterior Forearm Muscles
- Composed of twelve muscles primarily involved in extension and supination.
- Anconeus: Innervated by the radial nerve; assists in elbow extension.
- Brachioradialis: Innervated by the radial nerve; flexes the elbow in a semi-pronated position.
- Extensor carpi radialis longus: Innervated by the radial nerve; extends and abducts the wrist.
- Extensor carpi radialis brevis: Innervated by the deep radial nerve; extends the wrist.
- Supinator: Innervated by the deep radial nerve; supinates the forearm.
- Extensor digitorum: Innervated by the posterior interosseous nerve; extends the fingers.
- Extensor digiti minimi: Innervated by the posterior interosseous nerve; extends the little finger.
- Extensor carpi ulnaris: Innervated by the posterior interosseous nerve; extends and adducts the wrist.
- Extensor indicis: Innervated by the posterior interosseous nerve; extends the index finger.
- Abductor pollicis longus: Innervated by the posterior interosseous nerve; abducts the thumb.
- Extensor pollicis brevis: Innervated by the posterior interosseous nerve; extends the proximal phalanx of the thumb.
- Extensor pollicis longus: Innervated by the posterior interosseous nerve; extends the distal phalanx of the thumb.
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Description
Test your knowledge on the flexors, pronators, extensors, and supinators of the forearm in this comprehensive quiz. Questions cover muscle innervation and functions. Ideal for students studying anatomy and physiology.
