Upper Extremity Muscles Anatomy Quiz
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Questions and Answers

Which muscle forms the characteristic relief of the shoulder?

  • Trapezius muscle
  • Deltoid muscle (correct)
  • Pectoralis major muscle
  • Latissimus dorsi muscle

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

  • Pars transversa
  • Pars acromialis (correct)
  • Pars spinalis
  • Pars clavicularis

    • In axillary nerve palsy, which movement of the arm is impaired due to deltoid muscle atrophy?

  • Abduction (correct)
  • Adduction
  • Extension
  • Flexion

    • Which nerve stimulates the deltoid muscle?

    <p>Axillary nerve</p> Signup and view all the answers

    Which muscle works together with the pars spinalis of the deltoid muscle to allow external rotation and extension of the arm?

    <p>Latissimus dorsi muscle</p> Signup and view all the answers

    Which part of the deltoid muscle allows the upper limbs to swing forward (flexion) and backward (extension) during walking?

    <p>Deltoied</p> Signup and view all the answers

    Which muscle prevents the humerus from sliding down, especially when carrying weights in the hand?

    <p>Deltoid muscle</p> Signup and view all the answers

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

    <p>Deltoid muscle</p> Signup and view all the answers

    Which muscle allows adduction of the arm?

    <p>Pectoralis major muscle</p> Signup and view all the answers

    Which muscle assists in pronation of the forearm?

    <p>Pronator teres</p> Signup and view all the answers

    Which muscle allows flexion and abduction (radial deviation) of the hand?

    <p>Flexor carpi radialis</p> Signup and view all the answers

    Which muscle causes flexion and adduction (ulnar deviation) of the hand?

    <p>Flexor carpi ulnaris</p> Signup and view all the answers

    Which muscle is located deep to the superficial flexor muscles of the forearm?

    <p>Flexor digitorum superficialis</p> Signup and view all the answers

    Which muscle mainly flexes the middle phalanges of the 2nd-5th fingers?

    <p>Flexor digitorum superficialis</p> Signup and view all the answers

    Which muscle is the only forearm muscle whose tendon inserts into the aponeurosis palmaris?

    <p>Palmaris longus</p> Signup and view all the answers

    Which muscle starts from the medial epicondyle and the medial edge of the olecranon and the ulna?

    <p>Flexor carpi ulnaris</p> Signup and view all the answers

    Which muscle starts from the anterior face of the radius and the medial side of the medial epicondyle and processus coronoideus?

    <p>Flexor carpi radialis</p> Signup and view all the answers

    Which muscle allows fast and strong flexion of the 2nd-5th fingers?

    <p>Flexor digitorum superficialis</p> Signup and view all the answers

    Which muscle is responsible for turning the radius inward (pronation)?

    <p>Pronator teres</p> Signup and view all the answers

    Which muscle allows adduction, internal rotation, and extension of the arm?

    <p>Teres major</p> Signup and view all the answers

    Which muscle forms the posterior wall of the axillary fossa along with the latissimus dorsi muscle?

    <p>All of them</p> Signup and view all the answers

    Which muscle is the main muscle for internal rotation of the arm?

    <p>Subscapularis</p> Signup and view all the answers

    Which muscle is a powerful supinator and flexor of the forearm?

    <p>Biceps brachii</p> Signup and view all the answers

    Which muscle allows external rotation of the arm?

    <p>Infraspinatus</p> Signup and view all the answers

    Which muscle initiates the first 15° of arm abduction and has no function in rotatory movements?

    <p>Supraspinatus</p> Signup and view all the answers

    Which muscle is the main extensor muscle of the forearm?

    <p>Triceps brachii</p> Signup and view all the answers

    Which muscle starts on the dorsal aspect of the lateral edge of the scapula, close to the angulus inferior?

    <p>Teres major</p> Signup and view all the answers

    Which muscle is fused with the shoulder joint capsule and plays a crucial role in holding the humeral head in place?

    <p>Rotator cuff muscles</p> Signup and view all the answers

    Which muscle, together with the latissimus dorsi muscle, forms the posterior wall of the axillary fossa?

    <p>Teres major</p> Signup and view all the answers

    Which muscle forms the characteristic relief of the shoulder?

    <p>Deltoid</p> Signup and view all the answers

    Which muscle is the main abductor muscle of the arm?

    <p>Supraspinatus muscle</p> Signup and view all the answers

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

    <p>Pars clavicularis</p> Signup and view all the answers

    In axillary nerve palsy, what characteristic change occurs in the shoulder due to muscle atrophy?

    <p>Characteristic bulge of the shoulder disappears</p> Signup and view all the answers

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

    <p>Deltoid muscle</p> Signup and view all the answers

    Which muscle is responsible for turning the radius inward (pronation)?

    <p>Pronator teres muscle</p> Signup and view all the answers

    Which muscle prevents the humerus from sliding down, especially when carrying weights in the hand?

    <p>Deltoid muscle</p> Signup and view all the answers

    Which muscle allows fast and strong flexion of the 2nd-5th fingers?

    <p>Flexor digitorum superficialis muscle</p> Signup and view all the answers

    Which muscle is the main extensor muscle of the forearm?

    <p>Extensor carpi radialis longus muscle</p> Signup and view all the answers

    Which muscle is responsible for turning the radius inward (pronation)?

    <p>Pronator teres muscle</p> Signup and view all the answers

    Which muscle allows fast and strong flexion of the 2nd-5th fingers?

    <p>Flexor digitorum superficialis muscle</p> Signup and view all the answers

    Which muscle mainly flexes the middle phalanges of the 2nd-5th fingers?

    <p>Flexor digitorum superficialis muscle</p> Signup and view all the answers

    Which muscle allows flexion and abduction (radial deviation) of the hand?

    <p>Flexor carpi radialis muscle</p> Signup and view all the answers

    Which muscle causes flexion and adduction (ulnar deviation) of the hand?

    <p>Flexor carpi ulnaris muscle</p> Signup and view all the answers

    Which muscle is the only forearm muscle whose tendon inserts into the aponeurosis palmaris?

    <p>Palmaris longus muscle</p> Signup and view all the answers

    Which muscle allows adduction, internal rotation, and extension of the arm?

    <p>Subscapularis muscle</p> Signup and view all the answers

    Which muscle is a powerful supinator and flexor of the forearm?

    <p>Biceps brachii muscle</p> Signup and view all the answers

    Which muscle starts on the dorsal aspect of the lateral edge of the scapula, close to the angulus inferior?

    <p>Teres major muscle</p> Signup and view all the answers

    Which muscle works together with the pars spinalis of the deltoid muscle to allow external rotation and extension of the arm?

    <p>Infraspinatus muscle</p> Signup and view all the answers

    Which muscle assists in pronation of the forearm?

    <p>Brachioradialis</p> Signup and view all the answers

    Which muscle is located deep to the superficial flexor muscles of the forearm?

    <p>Flexor digitorum profundus</p> Signup and view all the answers

    Which muscle mainly flexes the middle phalanges of the 2nd-5th fingers?

    <p>Flexor digitorum superficialis</p> Signup and view all the answers

    Which muscle starts from the anterior face of the radius and the medial side of the medial epicondyle and processus coronoideus?

    <p>Pronator teres</p> Signup and view all the answers

    Which muscle is the only forearm muscle whose tendon inserts into the aponeurosis palmaris?

    <p>Palmaris longus</p> Signup and view all the answers

    Which muscle allows fast and strong flexion of the 2nd-5th fingers?

    <p>Flexor digitorum superficialis</p> Signup and view all the answers

    Which muscle allows flexion and abduction (radial deviation) of the hand?

    <p>Flexor carpi radialis</p> Signup and view all the answers

    Which muscle causes flexion and adduction (ulnar deviation) of the hand?

    <p>Flexor carpi ulnaris</p> Signup and view all the answers

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

    <p>Supraspinatus</p> Signup and view all the answers

    In axillary nerve palsy, which movement of the arm is impaired due to deltoid muscle atrophy?

    <p>Abduction</p> Signup and view all the answers

    Which muscle forms the characteristic relief of the shoulder?

    <p>Deltoid muscle</p> Signup and view all the answers

    In axillary nerve palsy, what characteristic change occurs in the shoulder due to muscle atrophy?

    <p>Impaired abduction movement of the arm</p> Signup and view all the answers

    Which muscle is stimulated by the axillary nerve?

    <p>Deltoid muscle</p> Signup and view all the answers

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

    <p>Deltoid muscle</p> Signup and view all the answers

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

    <p>Deltoid muscle</p> Signup and view all the answers

    Which muscle is fused with the shoulder joint capsule and plays a crucial role in holding the humeral head in place?

    <p>Deltoid muscle</p> Signup and view all the answers

    Which muscle prevents the humerus from sliding down, especially when carrying weights in the hand?

    <p>Deltoid muscle</p> Signup and view all the answers

    Which muscle is the main abductor muscle of the arm?

    <p>Deltoid muscle</p> Signup and view all the answers

    Which muscle is responsible for turning the radius inward (pronation)?

    <p>Pronator teres</p> Signup and view all the answers

    Which muscle is a powerful supinator and flexor of the forearm?

    <p>Brachioradialis</p> Signup and view all the answers

    Which muscle is responsible for turning the radius inward (pronation)?

    <p>Pronator teres muscle</p> Signup and view all the answers

    Which muscle is responsible for adduction, internal rotation, and extension of the arm?

    <p>Teres major muscle</p> Signup and view all the answers

    Which muscle is the main abductor muscle of the arm?

    <p>Deltoid muscle</p> Signup and view all the answers

    Which muscle forms the posterior wall of the axillary fossa along with the latissimus dorsi muscle?

    <p>Teres major muscle</p> Signup and view all the answers

    Which muscle allows flexion and abduction (radial deviation) of the hand?

    <p>Flexor carpi radialis muscle</p> Signup and view all the answers

    Which muscle initiates the first 15° of arm abduction and has no function in rotatory movements?

    <p>Supraspinatus muscle</p> Signup and view all the answers

    Which muscle forms the characteristic relief of the shoulder?

    <p>Deltoid muscle</p> Signup and view all the answers

    Which muscle is the main muscle for internal rotation of the arm?

    <p>Subscapularis muscle</p> Signup and view all the answers

    Which muscle mainly flexes the middle phalanges of the 2nd-5th fingers?

    <p>Flexor digitorum superficialis muscle</p> Signup and view all the answers

    Which muscle is a powerful supinator and flexor of the forearm, originating from the processus coracoideus and the tuberculum supraglenoidale?

    <p>Biceps brachii muscle</p> Signup and view all the answers

    Which muscle prevents the humerus from sliding down, especially when carrying weights in the hand?

    <p>Serratus anterior muscle</p> Signup and view all the answers

    Which muscle, with its three heads, is the main extensor muscle of the forearm?

    <p>Triceps brachii muscle</p> Signup and view all the answers

    Which muscle allows fast and strong flexion of the 2nd-5th fingers?

    <p>Flexor digitorum superficialis muscle</p> Signup and view all the answers

    Which muscle allows external rotation of the arm?

    <p>Infraspinatus muscle</p> Signup and view all the answers

    Which muscle works together with the deltoid muscle to allow external rotation and extension of the arm?

    <p>Infraspinatus muscle</p> Signup and view all the answers

    Which muscle is the main muscle for external rotation of the arm?

    <p>Infraspinatus muscle</p> Signup and view all the answers

    Which muscle is fused with the shoulder joint capsule and plays a crucial role in holding the humeral head in place?

    <p>Serratus anterior muscle</p> Signup and view all the answers

    Which muscle, together with the latissimus dorsi muscle, forms the posterior wall of the axillary fossa?

    <p>Teres major muscle</p> Signup and view all the answers

    Which muscle allows adduction, internal rotation, and extension of the arm?

    <p>Latissimus dorsi muscle</p> Signup and view all the answers

    Which muscle is responsible for holding the humeral head in place during arm movements?

    <p>Rotator cuff muscles</p> Signup and view all the answers

    Study Notes

    Upper Extremity Muscles Anatomy

    • The teres major muscle functions in all arm movements except adduction.
    • It starts on the dorsal aspect of the lateral edge of the scapula, close to the angulus inferior, and inserts into the crista tuberculi minoris on the humerus.
    • It allows adduction, internal rotation, and extension of the arm, similar to the latissimus dorsi muscle.
    • It, together with the latissimus dorsi muscle, forms the posterior wall of the axillary fossa.
    • The rotator cuff is a group of tendons fused with the shoulder joint capsule and plays a crucial role in holding the humeral head in place.
    • The rotator cuff muscles are supraspinatus, infraspinatus, teres minor, and subscapularis.
    • Supraspinatus muscle initiates the first 15° of arm abduction and has no function in rotatory movements.
    • Infraspinatus muscle allows external rotation of the arm.
    • Teres minor muscle also allows external rotation of the arm.
    • Subscapularis muscle is the main muscle for internal rotation of the arm.
    • Biceps brachii muscle is a powerful supinator and flexor of the forearm, originating from the processus coracoideus and the tuberculum supraglenoidale.
    • Triceps brachii muscle, with its three heads, is the main extensor muscle of the forearm.

    Upper Extremity Muscles Anatomy

    • The teres major muscle functions in all arm movements except adduction.
    • It starts on the dorsal aspect of the lateral edge of the scapula, close to the angulus inferior, and inserts into the crista tuberculi minoris on the humerus.
    • It allows adduction, internal rotation, and extension of the arm, similar to the latissimus dorsi muscle.
    • It, together with the latissimus dorsi muscle, forms the posterior wall of the axillary fossa.
    • The rotator cuff is a group of tendons fused with the shoulder joint capsule and plays a crucial role in holding the humeral head in place.
    • The rotator cuff muscles are supraspinatus, infraspinatus, teres minor, and subscapularis.
    • Supraspinatus muscle initiates the first 15° of arm abduction and has no function in rotatory movements.
    • Infraspinatus muscle allows external rotation of the arm.
    • Teres minor muscle also allows external rotation of the arm.
    • Subscapularis muscle is the main muscle for internal rotation of the arm.
    • Biceps brachii muscle is a powerful supinator and flexor of the forearm, originating from the processus coracoideus and the tuberculum supraglenoidale.
    • Triceps brachii muscle, with its three heads, is the main extensor muscle of the forearm.

    Upper Extremity Muscles Anatomy

    • The teres major muscle functions in all arm movements except adduction.
    • It starts on the dorsal aspect of the lateral edge of the scapula, close to the angulus inferior, and inserts into the crista tuberculi minoris on the humerus.
    • It allows adduction, internal rotation, and extension of the arm, similar to the latissimus dorsi muscle.
    • It, together with the latissimus dorsi muscle, forms the posterior wall of the axillary fossa.
    • The rotator cuff is a group of tendons fused with the shoulder joint capsule and plays a crucial role in holding the humeral head in place.
    • The rotator cuff muscles are supraspinatus, infraspinatus, teres minor, and subscapularis.
    • Supraspinatus muscle initiates the first 15° of arm abduction and has no function in rotatory movements.
    • Infraspinatus muscle allows external rotation of the arm.
    • Teres minor muscle also allows external rotation of the arm.
    • Subscapularis muscle is the main muscle for internal rotation of the arm.
    • Biceps brachii muscle is a powerful supinator and flexor of the forearm, originating from the processus coracoideus and the tuberculum supraglenoidale.
    • Triceps brachii muscle, with its three heads, is the main extensor muscle of the forearm.

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    Description

    Test your knowledge of upper extremity muscles anatomy with this quiz. Identify muscles, their functions, and origins, and understand the role of the rotator cuff in shoulder stability.

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