Major muscles of the arm exam review
This study material covers the major muscles of the arm, focusing on their anatomy, functions, and differences, suitable for college-level medical students.
Quiz(14 questions)
1. Which muscle is primarily responsible for elbow flexion?
Terms in this Study Set(21)
Biceps Brachii
A prominent muscle on the front of the upper arm, responsible for flexing the elbow and supinating the forearm.
Triceps Brachii
Located at the back of the upper arm, it extends the elbow and is crucial for pushing movements.
Brachialis
Located underneath the biceps, it flexes the elbow joint, playing a significant role in elbow flexion.
Coracobrachialis
A small muscle that assists in flexing and adducting the arm at the shoulder.
Flexor Carpi Radialis
A muscle that flexes and abducts the wrist, located on the anterior forearm.
Flexor Carpi Ulnaris
This muscle flexes and adducts the wrist and is found on the ulnar side of the forearm.
Palmaris Longus
A muscle that helps with wrist flexion; absent in some individuals.
Extensor Carpi Radialis Longus
Extends and abducts the wrist; located on the posterior forearm.
Extensor Carpi Radialis Brevis
Works alongside the longus to extend and abduct the wrist.
Extensor Carpi Ulnaris
Extends and adducts the wrist; located on the posterior side of the forearm.
Supinator
A muscle that supinates the forearm, allowing for palm-up positions.
Pronator Teres
A muscle that pronates the forearm, turning the palm downward.
Pronator Quadratus
Located near the wrist, it assists in pronation of the forearm.
Deltoid
The large muscle forming the shoulder, responsible for arm abduction and rotation.
Infraspinatus
Part of the rotator cuff, it externally rotates the arm at the shoulder.
Teres Minor
Also part of the rotator cuff, it aids in external rotation of the arm.
Pectoralis Major
A large chest muscle that helps in flexing, adducting, and rotating the arm.
Latissimus Dorsi
A large back muscle that extends, adducts, and internally rotates the arm.
True or false: The biceps brachii has two heads.
True, because it consists of a long head and a short head.
Difference between flexors and extensors
Flexors decrease the angle at a joint, while extensors increase it.
Fill in the blank: The _____ is the major muscle responsible for elbow extension.
Triceps Brachii.
Questions in this Study Set(14)
1. Which muscle is primarily responsible for elbow flexion?
2. What is the main function of the Triceps Brachii?
3. Which muscle assists in shoulder flexion and adduction?
4. Which of the following is NOT a muscle of the arm?
5. True or false: The Flexor Carpi Ulnaris abducts the wrist.
6. What is the primary action of the Supinator muscle?
7. Which muscle primarily extends the wrist?
8. Fill in the blank: The _____ is a key muscle for arm abduction.
9. Which muscle is part of the rotator cuff?
10. Difference between Biceps Brachii and Triceps Brachii
11. True or false: The Deltoid muscle can both flex and extend the arm.
12. Which muscle is involved in wrist abduction?
13. Which muscle flexes the elbow and is located deep to the biceps?
14. Which muscle's primary role is adduction of the arm?
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