Podcast
Questions and Answers
What is the primary function of the muscles in the posterior forearm?
What is the primary function of the muscles in the posterior forearm?
- Extension of the hand and digits (correct)
- Flexion of the hand and digits
- Pronation of the forearm
- Supination of the forearm
Which muscle is responsible for extending the 5th digit?
Which muscle is responsible for extending the 5th digit?
- Extensor digiti minimi (correct)
- Abductor pollicis longus
- Extensor digitorum
- Extensor carpi radialis brevis
What is the name of the ligament that creates a 'socket' for the head of the radius?
What is the name of the ligament that creates a 'socket' for the head of the radius?
- Interosseous membrane
- Ulnar collateral ligament
- Annular ligament of radius (correct)
- Radial collateral ligament
Which nerve innervates the muscles in the posterior forearm?
Which nerve innervates the muscles in the posterior forearm?
What is the name of the anatomical structure that contains the tendons of the extensor muscles?
What is the name of the anatomical structure that contains the tendons of the extensor muscles?
Which muscles are responsible for pronation of the forearm?
Which muscles are responsible for pronation of the forearm?
What is the name of the muscle that is responsible for supination of the forearm?
What is the name of the muscle that is responsible for supination of the forearm?
What is the name of the group of three muscles that move during pronation and supination?
What is the name of the group of three muscles that move during pronation and supination?
Which muscle is responsible for extending the thumb?
Which muscle is responsible for extending the thumb?
What is the name of the bursa that is located near the supinator muscle?
What is the name of the bursa that is located near the supinator muscle?
What is the origin of most of the muscles mentioned in the content?
What is the origin of most of the muscles mentioned in the content?
Which of the following muscles is absent in a significant percentage of the population?
Which of the following muscles is absent in a significant percentage of the population?
Which of the following muscles is not visible in the forearm?
Which of the following muscles is not visible in the forearm?
Which of the following muscles is not part of the Anterior Flexor compartment-superficial muscles?
Which of the following muscles is not part of the Anterior Flexor compartment-superficial muscles?
What is the common feature of the muscles mentioned in the content?
What is the common feature of the muscles mentioned in the content?
Which of the following muscles is responsible for flexion of the fingers?
Which of the following muscles is responsible for flexion of the fingers?
What nerve innervates the flexor pollicis longus muscle?
What nerve innervates the flexor pollicis longus muscle?
Which artery is not a branch of the brachial artery?
Which artery is not a branch of the brachial artery?
Which muscle is innervated by the ulnar nerve and acts on the medial half of digits 4 and 5?
Which muscle is innervated by the ulnar nerve and acts on the medial half of digits 4 and 5?
What is the name of the joint that connects the distal end of the radius to the carpal bones?
What is the name of the joint that connects the distal end of the radius to the carpal bones?
Which muscle is not innervated by the median nerve?
Which muscle is not innervated by the median nerve?
What is the main movement of the wrist joint that is allowed by the radiocarpal articulation?
What is the main movement of the wrist joint that is allowed by the radiocarpal articulation?
Which vein is not a branch of the brachial vein?
Which vein is not a branch of the brachial vein?
Which muscle is innervated by the ulnar nerve and acts on the interosseous muscles?
Which muscle is innervated by the ulnar nerve and acts on the interosseous muscles?
What is the name of the artery that forms the deep palmar arch?
What is the name of the artery that forms the deep palmar arch?
Which nerve innervates the pronator quadratus muscle?
Which nerve innervates the pronator quadratus muscle?
Which muscle is located in the superficial compartment of the forearm?
Which muscle is located in the superficial compartment of the forearm?
Which muscle has a humero-ulnar head?
Which muscle has a humero-ulnar head?
Which nerve is located between the palmaris longus and flexor carpi radialis?
Which nerve is located between the palmaris longus and flexor carpi radialis?
Which muscle has a radial head?
Which muscle has a radial head?
Which muscle is not part of the superficial compartment of the forearm?
Which muscle is not part of the superficial compartment of the forearm?
What is the relationship between the median nerve and the flexor carpi radialis?
What is the relationship between the median nerve and the flexor carpi radialis?
How many muscles are in the deep compartment of the forearm?
How many muscles are in the deep compartment of the forearm?
Which muscle is not part of the common flexor origin?
Which muscle is not part of the common flexor origin?
Which carpal bone is most frequently fractured?
Which carpal bone is most frequently fractured?
Which muscle contributes to flexion of the wrist?
Which muscle contributes to flexion of the wrist?
What is the name of the artery that runs near the wrist and is commonly used to take a pulse?
What is the name of the artery that runs near the wrist and is commonly used to take a pulse?
Which nerve passes through the carpal tunnel?
Which nerve passes through the carpal tunnel?
What is the name of the fracture that occurs at the distal end of the radius and is characterized by a 'dinner fork' deformity?
What is the name of the fracture that occurs at the distal end of the radius and is characterized by a 'dinner fork' deformity?
Which muscle is responsible for abduction of the wrist?
Which muscle is responsible for abduction of the wrist?
What is the name of the structure that connects the base of the metacarpals?
What is the name of the structure that connects the base of the metacarpals?
Which muscle is responsible for extension of the wrist?
Which muscle is responsible for extension of the wrist?
What is the name of the bone that forms the medial aspect of the wrist joint?
What is the name of the bone that forms the medial aspect of the wrist joint?
Which muscle is responsible for adduction of the wrist?
Which muscle is responsible for adduction of the wrist?
Flashcards
Flexor digitorum profundus (FDP)
Flexor digitorum profundus (FDP)
Muscle in the anterior forearm that flexes the distal phalanges of the fingers.
Flexor pollicis longus (FPL)
Flexor pollicis longus (FPL)
Muscle in the anterior forearm that flexes the distal phalanx of the thumb.
Pronator quadratus
Pronator quadratus
Muscle in the anterior forearm that pronates the forearm.
Flexor carpi radialis (FCR)
Flexor carpi radialis (FCR)
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Palmaris longus
Palmaris longus
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Flexor carpi ulnaris (FCU)
Flexor carpi ulnaris (FCU)
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Median nerve
Median nerve
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Pronator teres
Pronator teres
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Radial artery
Radial artery
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Ulnar artery
Ulnar artery
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Brachial veins
Brachial veins
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Cephalic vein
Cephalic vein
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Basilic vein
Basilic vein
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Wrist Joint
Wrist Joint
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Wrist Flexion
Wrist Flexion
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Extensor digitorum
Extensor digitorum
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Extensor carpi radialis longus and brevis
Extensor carpi radialis longus and brevis
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Extensor carpi ulnaris
Extensor carpi ulnaris
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Radial nerve
Radial nerve
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Pronation
Pronation
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Supination
Supination
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Colles' fracture
Colles' fracture
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Scaphoid fracture
Scaphoid fracture
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Study Notes
Muscles of the Forearm
- The anterior compartment of the forearm contains:
- Flexor digitorum profundus (FDP)
- Flexor pollicis longus (FPL)
- Pronator quadratus
- Flexor carpi radialis (FCR)
- Palmaris longus
- Flexor carpi ulnaris (FCU)
- The median nerve innervates:
- Pronator teres
- Flexor carpi radialis
- Palmaris longus
- Flexor digitorum profundus (medial half to digits 4/5)
- The ulnar nerve innervates:
- Flexor carpi ulnaris
- Flexor digitorum profundus (lateral half to digits 2/3)
- Interossei
- Adductor pollicis
- Hypothenar muscles
Arteries of the Forearm
- The brachial artery divides into:
- Radial artery
- Ulnar artery
- The radial artery divides into:
- Radial artery superficial
- Deep palmar arch
- The ulnar artery divides into:
- Ulnar artery superficial
- Superficial palmar arch
Veins of the Forearm
- The brachial veins drain into:
- Cephalic vein
- Basilic vein
- The radial veins drain into:
- Cephalic vein
- Median cubital vein
- The ulnar veins drain into:
- Basilic vein
- Median cubital vein
The Wrist Joint
- The wrist joint is a radiocarpal joint that connects the forearm to the hand
- The wrist joint allows for:
- Flexion and extension
- Rotation
- Pronation and supination
- The wrist joint is composed of:
- Distal radius
- Distal ulna
- Carpus (wrist bones)
Movements of the Wrist
- Flexion: Flexor carpi radialis, Flexor carpi ulnaris, and Palmaris longus
- Extension: Extensor carpi radialis longus and brevis, and Extensor carpi ulnaris
- Abduction: Flexor carpi radialis, Extensor carpi radialis longus and brevis
- Adduction: Extensor carpi ulnaris, Flexor carpi ulnaris
Posterior Forearm (Extensor Compartment)
- Contains:
- Extensor digitorum
- Extensor digiti minimi
- Extensor carpi radialis longus and brevis
- Extensor carpi ulnaris
- Supinator
- Abductor pollicis longus
- Extensor pollicis longus and brevis
- Extensor indicis
- Innervated by the radial nerve
Muscles of Pronation and Supination
- Pronation:
- Pronator teres
- Pronator quadratus
- Flexor carpi radialis
- Palmaris longus
- Supination:
- Supinator
- Biceps brachii
The Mobile Wad
- Consists of:
- Brachioradialis
- Extensor carpi radialis longus
- Extensor carpi radialis brevis
- These muscles move during pronation and supination
The Anatomical Snuffbox
- Contains:
- Extensor pollicis longus
- Extensor pollicis brevis
- Radial artery
- Extensor retinaculum
Muscles and Neurovasculature
- The median nerve lies between the palmaris longus and flexor carpi radialis
- The radial artery lies between the flexor carpi radialis and the radial styloid
- The ulnar nerve lies between the flexor carpi ulnaris and the ulnar styloid
Common Fractures at the Wrist Joint
- Colles' fracture: a fracture of the distal end of the radius
- Scaphoid fracture: a fracture of the scaphoid bone, the most frequently fractured carpal bone
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Description
This quiz covers the muscles in the anterior compartment of the forearm, including their innervation by the median and ulnar nerves. Test your knowledge of the muscles and their nerve supply.
