Podcast
Questions and Answers
Which muscle is responsible for flexion and abduction of the wrist?
Which muscle is responsible for flexion and abduction of the wrist?
- Palmaris longus
- Flexor carpi ulnaris
- Flexor carpi radialis (correct)
- Extensor carpi radialis longus
What is the origin of the flexor carpi ulnaris?
What is the origin of the flexor carpi ulnaris?
- Base of fifth metacarpal
- Lateral supracondylar ridge of humerus
- Medial epicondyle of humerus (correct)
- Lateral epicondyle of humerus
Which muscle's insertion is at the base of the second metacarpal bone?
Which muscle's insertion is at the base of the second metacarpal bone?
- Extensor carpi radialis longus (correct)
- Flexor carpi ulnaris
- Extensor carpi radialis brevis
- Palmaris longus
What action is performed by the palmaris longus?
What action is performed by the palmaris longus?
Which of the following muscles has an origin on the lateral epicondyle of the humerus?
Which of the following muscles has an origin on the lateral epicondyle of the humerus?
Which action is associated with the flexor carpi radialis?
Which action is associated with the flexor carpi radialis?
What is the primary role of the extensor carpi radialis longus?
What is the primary role of the extensor carpi radialis longus?
Which muscle is primarily responsible for wrist flexion and has no contribution in abduction?
Which muscle is primarily responsible for wrist flexion and has no contribution in abduction?
What is one of the primary actions of the subclavius muscle?
What is one of the primary actions of the subclavius muscle?
Which muscle is responsible for the upward rotation of the scapula?
Which muscle is responsible for the upward rotation of the scapula?
Where does the pectoralis major muscle originate?
Where does the pectoralis major muscle originate?
Which action is NOT associated with the trapezius muscle?
Which action is NOT associated with the trapezius muscle?
Which of the following muscles can extend the neck?
Which of the following muscles can extend the neck?
What is the function of the clavicular head of the pectoralis major?
What is the function of the clavicular head of the pectoralis major?
From where does the trapezius muscle originate?
From where does the trapezius muscle originate?
Which of the following best describes the action of the sternocostal head of the pectoralis major when acting alone?
Which of the following best describes the action of the sternocostal head of the pectoralis major when acting alone?
What is the primary role of the biceps brachii muscles?
What is the primary role of the biceps brachii muscles?
Where does the long head of the biceps brachii originate?
Where does the long head of the biceps brachii originate?
What structure is associated with the radial groove?
What structure is associated with the radial groove?
Which of the following movements does the biceps brachii contribute to?
Which of the following movements does the biceps brachii contribute to?
Which anatomical part does the biceps brachii insert into?
Which anatomical part does the biceps brachii insert into?
What component lies adjacent to the olecranon process of the ulna?
What component lies adjacent to the olecranon process of the ulna?
Which part of the biceps brachii is associated with the coracoid process?
Which part of the biceps brachii is associated with the coracoid process?
What type of movement is primarily facilitated by the biceps brachii during flexion?
What type of movement is primarily facilitated by the biceps brachii during flexion?
What is the primary action performed by the pronator at the radioulnar joints?
What is the primary action performed by the pronator at the radioulnar joints?
From where does the supinator originate?
From where does the supinator originate?
What major movement does the supinator facilitate at the radioulnar joints?
What major movement does the supinator facilitate at the radioulnar joints?
Which anatomical structure is associated with the action of pronation?
Which anatomical structure is associated with the action of pronation?
In addition to medial rotation, what other motion occurs at the radioulnar joints during pronation?
In addition to medial rotation, what other motion occurs at the radioulnar joints during pronation?
What is the primary action of the coracobrachialis muscle?
What is the primary action of the coracobrachialis muscle?
Where does the coracobrachialis muscle originate?
Where does the coracobrachialis muscle originate?
Which area does the coracobrachialis insert into?
Which area does the coracobrachialis insert into?
What muscle is associated with the action of extending the arm?
What muscle is associated with the action of extending the arm?
Which of the following structures is NOT part of the costal anatomy outlined?
Which of the following structures is NOT part of the costal anatomy outlined?
Which of the following actions is performed by the shoulder muscles as a group?
Which of the following actions is performed by the shoulder muscles as a group?
The action of flexing the humerus is associated with which muscle?
The action of flexing the humerus is associated with which muscle?
Which of the following muscles primarily contributes to shoulder abduction?
Which of the following muscles primarily contributes to shoulder abduction?
Study Notes
Muscles that Flex Fingers/Wrist
- Flexor carpi radialis originates at the medial epicondyle of the humerus and inserts at the bases of the 2nd and 3rd metacarpal bones. It helps with flexion and abduction of the wrist.
- Flexor carpi ulnaris originates at the medial epicondyle of the humerus, the adjacent medial surface of the olecranon, and the anteromedial portion of the ulna. It inserts at the pisiform, hamate, and the base of the fifth metacarpal bone. It assists in flexion and adduction at the wrist.
- Palmaris longus originates at the medial epicondyle of the humerus and inserts at the palmar aponeurosis and the flexor retinaculum. It helps with wrist flexion.
Muscles that Extend Wrist/Fingers
- Extensor carpi radialis longus originates at the lateral supracondylar ridge of the humerus and inserts at the base of the second metacarpal bone. It aids in flexion and abduction at the wrist.
- Extensor carpi radialis brevis originates at the lateral epicondyle of the humerus and inserts at the base of the third metacarpal bone. It helps with flexion and abduction at the wrist.
Muscles that Move the Arm
- Coracobrachialis originates at the coracoid process of the scapula and inserts at the medial margin of the shaft of the humerus. It assists with adduction and flexion of the shoulder.
- Pectoralis major originates at the clavicle and sternum and inserts at the lateral lip of the intertubular groove of the humerus. It helps with adduction, medial rotation, and drawing the scapula anteriorly and inferiorly.
- Biceps brachii (long head) originates at the supraglenoid tubercle of the scapula and inserts at the radial tuberosity of the radius. It assists with flexion, supination of the forearm, and medial rotation of the humerus.
- Biceps brachii (short head) originates at the coracoid process of the scapula and inserts at the radial tuberosity of the radius. It helps with flexion and supination of the forearm.
- Pronator teres originates at the coronoid process of the ulna and the lateral epicondyle of the humerus and inserts at the anterolateral surface of the radius, distal to the radial tuberosity. It assists with pronation of the forearm and flexion at the elbow.
- Supinator originates at the lateral epicondyle of the humerus, the ridge near the radial notch of the ulna, and the radial tuberosity. It assists with supination of the forearm and lateral rotation of the radius.
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Description
This quiz covers the muscles responsible for flexing and extending the wrist and fingers. Learn about the origins, insertions, and functions of key muscles such as the flexor carpi radialis and extensor carpi radialis. Test your knowledge on the anatomy of these important muscle groups.
