Forearm and Hand Muscles Anatomy Quiz

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Questions and Answers

Which muscle is responsible for the characteristic relief of the shoulder?

Pectoralis major

Deltoid muscle (correct)

Teres major

Latissimus dorsi

Which part of the deltoid muscle allows flexion and internal rotation of the arm?

Pars spinalis

Pars acromialis

Tuberositas deltoidea

Pars clavicularis (correct)

What happens in axillary nerve palsy with respect to the deltoid muscle?

Pars acromialis becomes more active

Characteristic bulge of the shoulder disappears due to muscle atrophy (correct)

Abduction movement of the arm is enhanced

Skin sensation is heightened in the upper part of the outer surface of the arm

What is the main function of the deltoid muscle?

Main abductor muscle of the arm Signup and view all the answers

What is the insertion point of the common tendon of the three parts of the deltoid muscle?

Tuberositas deltoidea (deltoid tuberosity) on the body of the humerus Signup and view all the answers

What does the pars acromialis of the deltoid muscle allow?

Abduction of the arm from 15° to 90° Signup and view all the answers

Which nerve stimulates the first and second lumbrical muscles?

N. medianus Signup and view all the answers

What is the function of the palmar interosseous muscles?

Adduct the 2nd, 4th and 5th fingers Signup and view all the answers

Where do the lumbrical muscles start from?

Tendons of the M. flexor digitorum profundus Signup and view all the answers

What is the termination point of the palmar interosseous muscles?

Base of the proximal phalanx and dorsal digital expansion Signup and view all the answers

Which nerve stimulates the third and fourth lumbrical muscles?

R. profundus Signup and view all the answers

What is the function of the dorsal interosseous muscles?

Abduct the fingers Signup and view all the answers

Which muscle is the main and only extensor muscle of the forearm?

Triceps brachii Signup and view all the answers

Which muscle initiates the first 15° of arm abduction and is part of the rotator cuff muscles?

Supraspinatus Signup and view all the answers

Which muscle is the main flexor muscle of the forearm, always active during forearm flexion?

Brachialis Signup and view all the answers

Which muscle allows adduction, internal rotation, and extension of the arm, and forms the posterior wall of the axillary fossa along with latissimus dorsi?

Teres major Signup and view all the answers

Which muscle is the main muscle for internal rotation of the arm and is the only muscle that inserts into the tuberculum minus of the humerus?

Subscapularis Signup and view all the answers

Which muscle allows some flexion and adduction of the arm and is located on the upper inner part of the arm?

Coracobrachialis Signup and view all the answers

Which muscle is responsible for medial and external rotation of the arm?

Infraspinatus Signup and view all the answers

Which nerve stimulates the flexor carpi ulnaris muscle?

Ulnar nerve Signup and view all the answers

Which muscle flexes the 2nd-5th fingers and weakly flexes the forearm and wrist?

Flexor digitorum superficialis Signup and view all the answers

Which muscle allows flexion and radial deviation of the hand?

Flexor carpi radialis Signup and view all the answers

Which muscle is the main pronator muscle of the forearm?

Pronator quadratus Signup and view all the answers

Which muscle causes flexion of the hand and stretches the aponeurosis palmaris?

Palmaris longus Signup and view all the answers

Which muscle is responsible for external rotation of the radius and works with the biceps brachii in strong or fast supination?

Anconeus muscle Signup and view all the answers

Which muscle causes abduction and extension of the thumb?

Extensor pollicis longus Signup and view all the answers

What causes lateral epicondylitis, also known as tennis elbow?

Repetitive use of the extensor muscles of the forearm Signup and view all the answers

Which nerve stimulates the tenar muscles, including abductor pollicis brevis, adductor pollicis, flexor pollicis brevis, and opponens pollicis?

Median nerve Signup and view all the answers

Which muscle is responsible for extension and adduction of the hand?

Extensor carpi ulnaris Signup and view all the answers

Which muscle assists in the extension of the index finger and hand?

Extensor indicis muscle Signup and view all the answers

Which part of the deltoid muscle allows abduction of the arm from 15° to 90°?

Pars acromialis Signup and view all the answers

What is the main abductor muscle of the arm?

Deltoid muscle Signup and view all the answers

Which nerve stimulates the deltoid muscle?

Axillary nerve Signup and view all the answers

What happens in axillary nerve palsy with respect to the deltoid muscle?

Impaired abduction movement of the arm Signup and view all the answers

What is the insertion point of the common tendon of the three parts of the deltoid muscle?

Greater tubercle of humerus Signup and view all the answers

Which muscle holds the humeral head in the glenoid cavity during arm movements?

Deltoid muscle Signup and view all the answers

Which muscle is responsible for both turning the radius inward and assisting in forearm flexion?

Pronator teres Signup and view all the answers

Which nerve stimulates the flexor carpi ulnaris muscle?

Ulnar nerve Signup and view all the answers

Which muscle is the main and only extensor muscle of the forearm?

Extensor digitorum Signup and view all the answers

Which muscle causes flexion and ulnar deviation of the hand?

Flexor carpi ulnaris Signup and view all the answers

Which muscle is the largest forearm muscle and flexes the distal phalanges of the 2nd-5th fingers?

Flexor digitorum profundus Signup and view all the answers

Which muscle allows flexion and radial deviation of the hand?

Flexor carpi radialis Signup and view all the answers

Which muscle is not part of the rotator cuff?

Teres major Signup and view all the answers

Which muscle is the main and only extensor muscle of the forearm?

Triceps brachii Signup and view all the answers

Which muscle is responsible for forearm supination, flexion, and arm flexion?

Brachioradialis Signup and view all the answers

Which muscle is the main flexor muscle of the forearm, always active during forearm flexion?

Brachialis Signup and view all the answers

Which muscle allows some flexion and adduction of the arm and is located on the upper inner part of the arm?

Coracobrachialis Signup and view all the answers

Which muscle is the main muscle for internal rotation of the arm and is the only muscle that inserts into the tuberculum minus of the humerus?

Subscapularis Signup and view all the answers

Which muscle is responsible for the characteristic relief of the shoulder?

Deltoid muscle Signup and view all the answers

What is the insertion point of the common tendon of the three parts of the deltoid muscle?

Deltoid tuberosity of the humerus Signup and view all the answers

Which muscle allows some flexion and adduction of the arm and is located on the upper inner part of the arm?

Coracobrachialis muscle Signup and view all the answers

What is the function of the dorsal interosseous muscles?

Abduct the fingers Signup and view all the answers

Which muscle allows adduction, internal rotation, and extension of the arm, and forms the posterior wall of the axillary fossa along with latissimus dorsi?

Teres major muscle Signup and view all the answers

Which muscle is responsible for external rotation of the radius and works with the biceps brachii in strong or fast supination?

Supinator muscle Signup and view all the answers

Which nerve stimulates the lumbrical muscles?

Median nerve Signup and view all the answers

What is the function of the palmar interosseous muscles?

Adduction of the fingers Signup and view all the answers

What is the function of the dorsal interosseous muscles?

Abduction of the fingers Signup and view all the answers

Which muscle is responsible for abducting the 2nd, 4th, and 5th fingers?

Palmar interosseous muscles Signup and view all the answers

Where do the lumbrical muscles terminate?

Dorsal digital expansion on the radial side of the proximal phalanx Signup and view all the answers

What is the main function of the lumbrical muscles?

Flexion of the metacarpophalangeal joints and extension of the interphalangeal joints Signup and view all the answers

Which muscle is responsible for the characteristic relief of the shoulder?

Trapezius muscle Signup and view all the answers

What is the insertion point of the common tendon of the three parts of the deltoid muscle?

Tuberositas deltoidea (deltoid tuberosity) on the body of the humerus Signup and view all the answers

Which nerve stimulates the deltoid muscle?

Axillary nerve Signup and view all the answers

Which muscle is the main and only extensor muscle of the forearm?

Extensor carpi ulnaris muscle Signup and view all the answers

Where do the lumbrical muscles start from?

Lateral epicondyle of the humerus Signup and view all the answers

What is the function of the palmar interosseous muscles?

Adduction of the fingers Signup and view all the answers

Which muscle is primarily responsible for forearm supination, flexion, and arm flexion?

Biceps brachii Signup and view all the answers

Which muscle is the main flexor muscle of the forearm, always active during forearm flexion?

Brachialis Signup and view all the answers

Which muscle is the main and only extensor muscle of the forearm?

Triceps brachii Signup and view all the answers

Which muscle is the main abductor muscle of the arm?

Supraspinatus Signup and view all the answers

Which muscle is the main pronator muscle of the forearm?

Biceps brachii Signup and view all the answers

Which muscle allows some flexion and adduction of the arm and is located on the upper inner part of the arm?

Coracobrachialis Signup and view all the answers

Which muscle is responsible for forearm supination, flexion, and arm flexion?

Biceps brachii Signup and view all the answers

Which muscle is the main pronator muscle of the forearm?

Pronator quadratus Signup and view all the answers

Which muscle allows flexion and ulnar deviation of the hand?

Flexor carpi ulnaris Signup and view all the answers

Which muscle is responsible for medial and external rotation of the arm?

Teres minor Signup and view all the answers

Which muscle flexes the 2nd-5th fingers and weakly flexes the forearm and wrist?

Flexor digitorum superficialis Signup and view all the answers

Which muscle is the main and only extensor muscle of the forearm?

Anconeus Signup and view all the answers

Which nerve stimulates the third and fourth lumbrical muscles?

Median nerve Signup and view all the answers

What is the function of the lumbrical muscles?

Cause flexion of the proximal phalanges at the metacarpophalangeal joints and extension of the other phalanges at the interphalangeal joints Signup and view all the answers

Where do the lumbrical muscles originate from?

Flexor tendons Signup and view all the answers

What is the function of the palmar interossei muscles?

Adduct the fingers Signup and view all the answers

What is the function of the dorsal interossei muscles?

Adduct the fingers Signup and view all the answers

Which nerve stimulates the first and second lumbrical muscles?

Ulnar nerve Signup and view all the answers

Which muscle is responsible for external rotation of the radius and works with the biceps brachii in strong or fast supination?

Supinator Signup and view all the answers

Which muscle is responsible for lateral epicondylitis, also known as tennis elbow?

Extensor carpi ulnaris Signup and view all the answers

Which muscle is stimulated by the ulnar nerve and includes abductor digiti minimi, flexor digiti minimi, and opponens digiti minimi?

Hypothenar muscles Signup and view all the answers

Which muscle is responsible for adduction and extension of the hand?

Extensor carpi ulnaris Signup and view all the answers

Which muscle assists in the extension of the index finger and hand?

Extensor indicis Signup and view all the answers

Which muscle is responsible for external rotation of the radius and works with the biceps brachii in strong or fast supination?

Anconeus Signup and view all the answers

Study Notes

Anatomy of the Forearm and Hand Muscles

Continuous and forceful movements cause inflammation of the medial epicondyle, leading to pain on the medial side of the elbow
Deep muscles of the forearm include abductor pollicis longus and extensor pollicis longus, which cause abduction and extension of the thumb
Extensor digitorum muscle extends the 2nd-5th phalanges, while extensor carpi ulnaris causes extension and adduction of the hand
Anconeus muscle helps in the extension of the forearm and is stimulated by the radial nerve
Supinator muscle is responsible for external rotation of the radius and works with the biceps brachii in strong or fast supination
Lateral epicondylitis (tennis elbow) is caused by repetitive use of the extensor muscles of the forearm or vigorous supination-pronation movements
Carpal tunnel syndrome results from compression of the median nerve in the carpal tunnel, leading to pain and weakening of the tenar muscles' function
Tenar muscles, stimulated by the median nerve, include abductor pollicis brevis, adductor pollicis, flexor pollicis brevis, and opponens pollicis
Hypothenar muscles, stimulated by the ulnar nerve, include abductor digiti minimi, flexor digiti minimi, and opponens digiti minimi
The deep layer flexor muscles include adductor pollicis, abductor pollicis brevis, flexor pollicis brevis, and opponens pollicis
Extensor indicis muscle assists in the extension of the index finger and hand
Anatomical snuffbox, located on the back of the hand, is defined by the tendons of extensor pollicis longus and extensor pollicis brevis and the retinaculum musculorum extensorum

Anatomy of the Forearm and Hand Muscles

Continuous and forceful movements cause inflammation of the medial epicondyle, leading to pain on the medial side of the elbow
Deep muscles of the forearm include abductor pollicis longus and extensor pollicis longus, which cause abduction and extension of the thumb
Extensor digitorum muscle extends the 2nd-5th phalanges, while extensor carpi ulnaris causes extension and adduction of the hand
Anconeus muscle helps in the extension of the forearm and is stimulated by the radial nerve
Supinator muscle is responsible for external rotation of the radius and works with the biceps brachii in strong or fast supination
Lateral epicondylitis (tennis elbow) is caused by repetitive use of the extensor muscles of the forearm or vigorous supination-pronation movements
Carpal tunnel syndrome results from compression of the median nerve in the carpal tunnel, leading to pain and weakening of the tenar muscles' function
Tenar muscles, stimulated by the median nerve, include abductor pollicis brevis, adductor pollicis, flexor pollicis brevis, and opponens pollicis
Hypothenar muscles, stimulated by the ulnar nerve, include abductor digiti minimi, flexor digiti minimi, and opponens digiti minimi
The deep layer flexor muscles include adductor pollicis, abductor pollicis brevis, flexor pollicis brevis, and opponens pollicis
Extensor indicis muscle assists in the extension of the index finger and hand
Anatomical snuffbox, located on the back of the hand, is defined by the tendons of extensor pollicis longus and extensor pollicis brevis and the retinaculum musculorum extensorum

Anatomy of the Forearm and Hand Muscles

Continuous and forceful movements cause inflammation of the medial epicondyle, leading to pain on the medial side of the elbow
Deep muscles of the forearm include abductor pollicis longus and extensor pollicis longus, which cause abduction and extension of the thumb
Extensor digitorum muscle extends the 2nd-5th phalanges, while extensor carpi ulnaris causes extension and adduction of the hand
Anconeus muscle helps in the extension of the forearm and is stimulated by the radial nerve
Supinator muscle is responsible for external rotation of the radius and works with the biceps brachii in strong or fast supination
Lateral epicondylitis (tennis elbow) is caused by repetitive use of the extensor muscles of the forearm or vigorous supination-pronation movements
Carpal tunnel syndrome results from compression of the median nerve in the carpal tunnel, leading to pain and weakening of the tenar muscles' function
Tenar muscles, stimulated by the median nerve, include abductor pollicis brevis, adductor pollicis, flexor pollicis brevis, and opponens pollicis
Hypothenar muscles, stimulated by the ulnar nerve, include abductor digiti minimi, flexor digiti minimi, and opponens digiti minimi
The deep layer flexor muscles include adductor pollicis, abductor pollicis brevis, flexor pollicis brevis, and opponens pollicis
Extensor indicis muscle assists in the extension of the index finger and hand
Anatomical snuffbox, located on the back of the hand, is defined by the tendons of extensor pollicis longus and extensor pollicis brevis and the retinaculum musculorum extensorum

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Test your knowledge of the forearm and hand muscles with this anatomy quiz. Explore the functions and characteristics of key muscles, their associated nerves, and common conditions such as tennis elbow and carpal tunnel syndrome.

Forearm and Hand Muscles Anatomy Quiz

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Questions and Answers

Which muscle is responsible for the characteristic relief of the shoulder?

Which part of the deltoid muscle allows flexion and internal rotation of the arm?

What happens in axillary nerve palsy with respect to the deltoid muscle?

What is the main function of the deltoid muscle?

What is the insertion point of the common tendon of the three parts of the deltoid muscle?

What does the pars acromialis of the deltoid muscle allow?

Which nerve stimulates the first and second lumbrical muscles?

What is the function of the palmar interosseous muscles?

Where do the lumbrical muscles start from?

What is the termination point of the palmar interosseous muscles?

Which nerve stimulates the third and fourth lumbrical muscles?

What is the function of the dorsal interosseous muscles?

Which muscle is the main and only extensor muscle of the forearm?

Which muscle initiates the first 15° of arm abduction and is part of the rotator cuff muscles?

Which muscle is the main flexor muscle of the forearm, always active during forearm flexion?

Which muscle allows adduction, internal rotation, and extension of the arm, and forms the posterior wall of the axillary fossa along with latissimus dorsi?

Which muscle is the main muscle for internal rotation of the arm and is the only muscle that inserts into the tuberculum minus of the humerus?

Which muscle allows some flexion and adduction of the arm and is located on the upper inner part of the arm?

Which muscle is responsible for medial and external rotation of the arm?

Which nerve stimulates the flexor carpi ulnaris muscle?

Which muscle flexes the 2nd-5th fingers and weakly flexes the forearm and wrist?

Which muscle allows flexion and radial deviation of the hand?

Which muscle is the main pronator muscle of the forearm?

Which muscle causes flexion of the hand and stretches the aponeurosis palmaris?

Which muscle is responsible for external rotation of the radius and works with the biceps brachii in strong or fast supination?

Which muscle causes abduction and extension of the thumb?

What causes lateral epicondylitis, also known as tennis elbow?

Which nerve stimulates the tenar muscles, including abductor pollicis brevis, adductor pollicis, flexor pollicis brevis, and opponens pollicis?

Which muscle is responsible for extension and adduction of the hand?

Which muscle assists in the extension of the index finger and hand?

Which part of the deltoid muscle allows abduction of the arm from 15° to 90°?

What is the main abductor muscle of the arm?

Which nerve stimulates the deltoid muscle?

What happens in axillary nerve palsy with respect to the deltoid muscle?

What is the insertion point of the common tendon of the three parts of the deltoid muscle?

Which muscle holds the humeral head in the glenoid cavity during arm movements?

Which muscle is responsible for both turning the radius inward and assisting in forearm flexion?

Which nerve stimulates the flexor carpi ulnaris muscle?

Which muscle is the main and only extensor muscle of the forearm?

Which muscle causes flexion and ulnar deviation of the hand?

Which muscle is the largest forearm muscle and flexes the distal phalanges of the 2nd-5th fingers?

Which muscle allows flexion and radial deviation of the hand?

Which muscle is not part of the rotator cuff?

Which muscle is the main and only extensor muscle of the forearm?

Which muscle is responsible for forearm supination, flexion, and arm flexion?

Which muscle is the main flexor muscle of the forearm, always active during forearm flexion?

Which muscle allows some flexion and adduction of the arm and is located on the upper inner part of the arm?

Which muscle is the main muscle for internal rotation of the arm and is the only muscle that inserts into the tuberculum minus of the humerus?

Which muscle is responsible for the characteristic relief of the shoulder?

What is the insertion point of the common tendon of the three parts of the deltoid muscle?

Which muscle allows some flexion and adduction of the arm and is located on the upper inner part of the arm?

What is the function of the dorsal interosseous muscles?

Which muscle allows adduction, internal rotation, and extension of the arm, and forms the posterior wall of the axillary fossa along with latissimus dorsi?

Which muscle is responsible for external rotation of the radius and works with the biceps brachii in strong or fast supination?

Which nerve stimulates the lumbrical muscles?

What is the function of the palmar interosseous muscles?

What is the function of the dorsal interosseous muscles?

Which muscle is responsible for abducting the 2nd, 4th, and 5th fingers?

Where do the lumbrical muscles terminate?

What is the main function of the lumbrical muscles?

Which muscle is responsible for the characteristic relief of the shoulder?

What is the insertion point of the common tendon of the three parts of the deltoid muscle?

Which nerve stimulates the deltoid muscle?

Which muscle is the main and only extensor muscle of the forearm?

Where do the lumbrical muscles start from?

What is the function of the palmar interosseous muscles?

Which muscle is primarily responsible for forearm supination, flexion, and arm flexion?

Which muscle is the main flexor muscle of the forearm, always active during forearm flexion?

Which muscle is the main and only extensor muscle of the forearm?

Which muscle is the main abductor muscle of the arm?

Which muscle is the main pronator muscle of the forearm?

Which muscle allows some flexion and adduction of the arm and is located on the upper inner part of the arm?

Which muscle is responsible for forearm supination, flexion, and arm flexion?

Which muscle is the main pronator muscle of the forearm?

Which muscle allows flexion and ulnar deviation of the hand?

Which muscle is responsible for medial and external rotation of the arm?