Embarking on a journey through the intricate tapestry of human anatomy, we present Muscles of the Upper Limb Review Sheet 13. This comprehensive guide delves into the complexities of the upper limb’s muscular system, unraveling the intricate interplay of muscles, movements, and functions.
As we traverse this anatomical landscape, we will explore the muscles of the shoulder, arm, forearm, and hand, deciphering their origins, insertions, and actions. This knowledge will serve as a cornerstone for understanding the intricate symphony of movement and function that characterizes the upper limb.
Muscles of the Upper Limb Review Sheet: Muscles Of The Upper Limb Review Sheet 13
The muscles of the upper limb are responsible for a wide range of movements, from simple tasks like reaching and grasping to complex actions like playing a musical instrument or performing surgery. Understanding the anatomy of the upper limb is essential for professionals in various fields, including physical therapy, occupational therapy, and athletic training.
This review sheet provides a comprehensive overview of the muscles of the upper limb, including their origins, insertions, and actions. It is designed to serve as a valuable resource for students and practitioners alike.
Muscles of the Shoulder
The shoulder muscles are responsible for a wide range of movements, including flexion, extension, abduction, adduction, and rotation. The major muscles of the shoulder include:
- Deltoid: The deltoid is a large, triangular muscle that covers the shoulder joint. It is responsible for abduction, flexion, and extension of the arm.
- Supraspinatus: The supraspinatus is a small muscle located on the top of the shoulder blade. It is responsible for abduction of the arm.
- Infraspinatus: The infraspinatus is a small muscle located on the back of the shoulder blade. It is responsible for external rotation of the arm.
- Teres minor: The teres minor is a small muscle located on the back of the shoulder blade. It is responsible for external rotation of the arm.
- Subscapularis: The subscapularis is a large muscle located on the front of the shoulder blade. It is responsible for internal rotation of the arm.
Muscles of the Arm
The arm muscles are responsible for flexion, extension, and supination of the forearm. The major muscles of the arm include:
- Biceps brachii: The biceps brachii is a large muscle located on the front of the upper arm. It is responsible for flexion of the elbow joint.
- Triceps brachii: The triceps brachii is a large muscle located on the back of the upper arm. It is responsible for extension of the elbow joint.
- Brachioradialis: The brachioradialis is a small muscle located on the front of the forearm. It is responsible for flexion of the forearm at the elbow joint.
Muscles of the Forearm
The forearm muscles are responsible for pronation and supination of the hand, as well as flexion and extension of the wrist and fingers. The major muscles of the forearm include:
- Flexor carpi radialis: The flexor carpi radialis is a large muscle located on the front of the forearm. It is responsible for flexion of the wrist joint.
- Extensor carpi radialis longus: The extensor carpi radialis longus is a large muscle located on the back of the forearm. It is responsible for extension of the wrist joint.
- Pronator teres: The pronator teres is a small muscle located on the front of the forearm. It is responsible for pronation of the forearm.
- Supinator: The supinator is a small muscle located on the back of the forearm. It is responsible for supination of the forearm.
Muscles of the Hand
The hand muscles are responsible for a wide range of movements, including flexion, extension, abduction, adduction, and opposition of the fingers and thumb. The major muscles of the hand include:
- Flexor digitorum superficialis: The flexor digitorum superficialis is a large muscle located on the front of the forearm. It is responsible for flexion of the proximal phalanges of the fingers.
- Flexor digitorum profundus: The flexor digitorum profundus is a large muscle located on the front of the forearm. It is responsible for flexion of the distal phalanges of the fingers.
- Extensor digitorum: The extensor digitorum is a large muscle located on the back of the forearm. It is responsible for extension of the fingers.
- Abductor pollicis brevis: The abductor pollicis brevis is a small muscle located on the thenar eminence of the hand. It is responsible for abduction of the thumb.
Review Sheet, Muscles of the upper limb review sheet 13
The following review sheet provides a summary of the muscles of the upper limb, including their origins, insertions, and actions:
| Muscle Name | Origin | Insertion | Action |
|---|---|---|---|
| Deltoid | Clavicle, acromion, spine of scapula | Deltoid tuberosity of humerus | Abduction, flexion, extension |
| Supraspinatus | Supraspinous fossa of scapula | Greater tubercle of humerus | Abduction |
| Infraspinatus | Infraspinous fossa of scapula | Greater tubercle of humerus | External rotation |
| Teres minor | Lateral border of scapula | Greater tubercle of humerus | External rotation |
| Subscapularis | Subscapular fossa of scapula | Lesser tubercle of humerus | Internal rotation |
| Biceps brachii | Coracoid process of scapula, supraglenoid tubercle | Radial tuberosity of radius, ulna | Flexion of elbow joint |
| Triceps brachii | Lateral and medial surfaces of humerus | Olecranon process of ulna | Extension of elbow joint |
| Brachioradialis | Lateral supracondylar ridge of humerus | Radius | Flexion of forearm at elbow joint |
| Flexor carpi radialis | Medial epicondyle of humerus | Base of second and third metacarpals | Flexion of wrist joint |
| Extensor carpi radialis longus | Lateral supracondylar ridge of humerus | Base of second metacarpal | Extension of wrist joint |
| Pronator teres | Medial epicondyle of humerus, radius | Radius | Pronation of forearm |
| Supinator | Lateral epicondyle of humerus, ulna | Radius | Supination of forearm |
| Flexor digitorum superficialis | Medial epicondyle of humerus, radius, ulna | Middle phalanges of fingers | Flexion of proximal phalanges of fingers |
| Flexor digitorum profundus | Medial epicondyle of humerus, ulna | Distal phalanges of fingers | Flexion of distal phalanges of fingers |
| Extensor digitorum | Lateral epicondyle of humerus | Base of proximal phalanges of fingers | Extension of fingers |
| Abductor pollicis brevis | Thenar eminence of hand | Base of proximal phalanx of thumb | Abduction of thumb |
Question & Answer Hub
What is the purpose of a review sheet for the muscles of the upper limb?
A review sheet provides a structured and concise summary of the key information about the muscles of the upper limb, including their names, origins, insertions, actions, and innervation. This facilitates efficient memorization and recall, making it an invaluable tool for students, healthcare professionals, and fitness enthusiasts.
Why is it important to understand the anatomy of the upper limb?
Understanding the anatomy of the upper limb is crucial for various professions, including physical therapy, occupational therapy, and athletic training. It enables practitioners to assess and treat musculoskeletal conditions, develop rehabilitation plans, and optimize performance in sports and daily activities.
