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6. Flexor carpi radialis Flexor carpi ulnaris 3. Flexor digitorum superficialis Pronator quadratus Pronator teres Supinator (Posterior) (Anterior) (Anterior) (Anterior)

6. Flexor carpi radialis Flexor carpi ulnaris 3. Flexor digitorum superficialis Pronator quadratus Pronator teres Supinator (Posterior) (Anterior) (Anterior) (Anterior)

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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**Structure and Function of Forearm Muscles** **Supinator Muscle** The supinator is a short muscle near the elbow that *arises* from the lateral epicondyle of the humerus and the ridge of the ulna. It curves around the upper portion of the radius and *inserts* on the lateral edge of the radial tuberosity and the oblique line of the radius. **Flexion of Fingers of the Hand** Three muscles flex the fingers. The flexor digitorum superficialis, as seen in illustration D, figure 27.2, flexes all fingers except the thumb. It *arises* on the humerus, ulna, and radius. Its *insertion* consists of... **Illustrations**: - **Illustration A (Posterior View)**: - Muscle 1: Supinator - **Illustration B (Anterior View)**: - Muscle 2: Flexor carpi radialis - Muscle 3: Pronator teres - **Illustration C (Anterior View)**: - Muscle 4: Flexor carpi ulnaris - Muscle 5: Flexor digitorum superficialis - **Illustration D (Anterior View)**: - Muscle 6: Flexor digitorum superficialis **Muscles Labeled**: 1. Flexor carpi radialis 2. Flexor carpi ulnaris 3. Flexor digitorum superficialis 4. Pronator quadratus 5. Pronator teres 6. Supinator These muscles play crucial roles in the movement and flexibility of the fingers and wrist, facilitating various hand functions.
Transcribed Image Text:**Structure and Function of Forearm Muscles** **Supinator Muscle** The supinator is a short muscle near the elbow that *arises* from the lateral epicondyle of the humerus and the ridge of the ulna. It curves around the upper portion of the radius and *inserts* on the lateral edge of the radial tuberosity and the oblique line of the radius. **Flexion of Fingers of the Hand** Three muscles flex the fingers. The flexor digitorum superficialis, as seen in illustration D, figure 27.2, flexes all fingers except the thumb. It *arises* on the humerus, ulna, and radius. Its *insertion* consists of... **Illustrations**: - **Illustration A (Posterior View)**: - Muscle 1: Supinator - **Illustration B (Anterior View)**: - Muscle 2: Flexor carpi radialis - Muscle 3: Pronator teres - **Illustration C (Anterior View)**: - Muscle 4: Flexor carpi ulnaris - Muscle 5: Flexor digitorum superficialis - **Illustration D (Anterior View)**: - Muscle 6: Flexor digitorum superficialis **Muscles Labeled**: 1. Flexor carpi radialis 2. Flexor carpi ulnaris 3. Flexor digitorum superficialis 4. Pronator quadratus 5. Pronator teres 6. Supinator These muscles play crucial roles in the movement and flexibility of the fingers and wrist, facilitating various hand functions.
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