Questions and Answers
What is the primary responsibility of the Appendicular Musculature?
What are the two major groups of Appendicular Muscles?
The muscles of the pectoral girdle and upper limbs, and the muscles of the pelvic girdle and lower limbs.
How can the muscles associated with the pectoral girdle and upper limbs be divided?
Muscles that position the pectoral girdle, muscles that move the arm, muscles that move the forearm and hand, and muscles that move the hand and fingers.
What is the function of the Levator Scapulae?
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What does the Pectoralis Minor do?
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What action does the Rhomboid Major perform?
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What is the function of the Serratus Anterior?
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What role does the Trapezius play?
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What muscle abducts the arm?
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What action does the Biceps Brachii perform?
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What is the function of the Triceps Brachii?
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What muscle flexes at the elbow?
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What does the Flexor Carpi Radialis do?
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What is the main function of the Extensor Digitorum?
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Study Notes
Appendicular Musculature Overview
- Responsible for stabilizing the pectoral and pelvic girdles.
- Facilitates movement of the upper and lower limbs.
- Absorbs shocks during activities like walking, running, and jumping.
- Strengthens joint areas to enhance stability.
Major Groups of Appendicular Muscles
- Muscles of the pectoral girdle and upper limbs.
- Muscles of the pelvic girdle and lower limbs.
Muscle Groups Associated with Pectoral Girdle and Upper Limbs
- Muscles that position the pectoral girdle.
- Muscles that move the arm.
- Muscles that move the forearm and hand.
- Forearm muscles that control hand and finger movement.
Key Muscles of the Pectoral Girdle
- Levator Scapulae: Elevates the scapula.
- Pectoralis Minor: Protracts the shoulder.
- Rhomboid Major/Minor: Adduct the scapula toward the midline.
- Serratus Anterior: Protracts the scapula.
- Subclavius: Protracts the scapula.
- Trapezius: Rotates scapula and extends the neck.
Key Muscles Moving the Arm
- Deltoid: Abducts the arm; covers shoulder joint.
- Pectoralis Major: Adducts and medially rotates the arm.
- Coracobrachialis: Adducts at the shoulder.
Muscles of the Upper Arm
- Biceps Brachii: Flexes the lower arm; consists of short and long heads.
- Teres Major: Responsible for extension and medial rotation at the shoulder.
- Subscapularis: Medial rotation at shoulder.
- Supraspinatus: Abducts at the shoulder.
- Triceps Brachii: Extends the lower arm; includes three heads (lateral, long, medial).
Forearm Muscles
- Brachialis: Flexes at the elbow.
- Brachioradialis: Flexes at the elbow.
- Flexor Carpi Radialis: Flexes and abducts the wrist.
- Palmaris Longus: Flexes at the wrist.
- Flexor Carpi Ulnaris: Flexes and adducts the wrist.
Extensor Muscles of the Forearm
- Anconeus: Extends at the elbow.
- Extensor Carpi Radialis Longus: Extends and abducts at the wrist.
- Extensor Carpi Ulnaris: Extends and adducts at the wrist.
- Extensor Carpi Radialis Brevis: Extends and abducts at the wrist.
Finger and Thumb Movements
- Flexor Digitorum Superficialis: Allows flexion at the wrist and some digits.
- Flexor Pollicis Longus: Flexes the thumb.
- Abductor Pollicis Longus: Abducts the thumb.
- Extensor Digitorum: Extends fingers and wrist.
- Extensor Pollicis Brevis: Extends and abducts the thumb.
- Extensor Digiti Minimi: Extends the little finger.
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Description
Explore the appendicular musculature through this flashcard quiz focused on Chapter 11 of the Muscular System. Test your knowledge of the functions and groups of muscles responsible for stabilizing and moving the limbs. Ideal for students looking to strengthen their understanding of anatomy.
