Forearm Muscles

MUSCLES FOREWORD

The muscles of the Forearm are divided into 3 regions:

• Previous Region
• Lateral Region
• Later Region

Previous Region  & #8211; 1st layer

1. ROUND PRONATOR

Proximal Insertion: Medial humeral epicondyle and coronoid process of the ulna

Distal Insertion: Lateral face of the middle 1/3 of the radius shaft
Innervation: Median Nerve (C6 & #8211; C7)
Action: Forearm Pronation and Elbow Flexion Assist

2. RADIAL CARPLE FLEXOR

Proximal Insertion: Medial epicondyle (epitrochlea)
Distal Insertion: Anterior face of the 2nd metacarpal
Innervation: Median Nerve (C6 and C7)
Action: Wrist Flexion and Hand Abduction (radial deviation)

3. PALMAR LONG

Proximal Insertion: Medial Epicondyle

Distal Insertion: Palmar aponeurosis and flexor retinaculum
Innervation: Median Nerve (C6 & #8211; C8)
Action: Wrist flexion, palmar aponeurosis tension and flexor retinaculum

4. ULNAR CARPLE FLEXOR

Proximal Insertion: Medial epicondyle and olecranon

Distal Insertion: Pisiform bone, hamate and 5th metacarpal
Innervation: Ulnar Nerve (C7 & #8211; T1)
Action: Wrist Flexion and Hand Adduction (ulnar deviation)

Previous Region & #8211; 2nd layer

1. FINGER FLEXOR OF FINGERS

Proximal Insertion: Medial epicondyle, ulna coronoid process and ulnar collateral ligament

Distal Insertion: Anterior face of the middle phalanx of the 2nd to 5th fingers
Innervation: Median Nerve (C7 and T1)
Action: Wrist Flexion and IFP & #8211; 2nd to 5th Fingers

Previous Region & #8211; 3rd layer

1. DEEP FINGER FLEXOR

Proximal Insertion: Anterior face of proximal da ulna and radius and interosseous membrane

Distal Insertion: Anterior face of distal phalanx of 2nd to 5th fingers
Innervation: Median Nerve (C8 & #8211; T1): 2nd and 3rd fingers. Ulnar Nerve (C8 & #8211; T1): 4th and 5th fingers
Action: Wrist Flexion, IFP and IFD of 2nd, 3rd, 4th and 5th Fingers

2. THONG LONG FLEXOR

Proximal Insertion: Anterior aspect of the radius, interosseous membrane, coronoid process of the ulna and medial epicondyle of the humerus.

Distal Insertion: Distal Phalanx of the Thumb
Innervation: Median Nerve (C8 and T1)
Action: Thumb IF Flexion

Rprevious egion & #8211;4th layer

1. SQUARE PRONATOR

Proximal Insertion: ¼ of anterior aspect of ulna
Distal Insertion: ¼ of the front face of the radio
Innervation: Median Nerve (C8)
Action: Pronation

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RLater Region & #8211; Surface layer

1. FINGER EXTENDER

Proximal Insertion: Lateral humeral epicondyle
Distal Insertion: Middle and distal phalanges of the 2nd to 5th fingers
Innervation: Radial Nerve (C7 & #8211; C8)
Action: Wrist Extension, MF, IFP and IFD from 2nd to 5th Fingers

2. 5TH FINGER EXTENDER (MINIMUM)

Proximal Insertion: Lateral humeral epicondyle
Distal Insertion: Tendon of the common extensor to the 5th finger
Innervation: Radial Nerve (C7 & #8211; C8)
Action: Extension of the 5th finger

3. ULNAR Carpal Extender

Proximal Insertion: Lateral humeral epicondyle
Distal Insertion: Base of the 5th metacarpal
Innervation: Radial Nerve (C6 & #8211; C8)
Action: Wrist Extension and Hand Adduction (ulnar deviation)

4. ANCONE

Proximal Insertion: Lateral humeral epicondyle
Distal Insertion: Ulecran olecranon and proximal ¼ of posterior surface of ulna diaphysis
Innervation: Radial Nerve (C7 and C8)
Action: Elbow Extension

Posterior Region & #8211; Deep layer

1. LONG THINKING ABDUCER

Proximal Insertion: Posterior face of the radius and ulna and interosseous membrane
Distal Insertion: 1st metacarpal
Innervation: Radial Nerve (C7 & #8211; C8)
Action: Abduction of the Hand and Thumb

2. THUMB SHORT EXTENSOR

Proximal Insertion: Radius posterior face and interosseous membrane
Distal Insertion: Dorsal face of proximal phalanx of thumb
Innervation: Radial Nerve (C7 & #8211; C8)
Action: Thumb Extension

3. THONG LONG EXTENDER

Proximal Insertion: Posterior face of the middle 1/3 of the ulna and interosseous membrane
Distal Insertion: Distal Phalanx of the Thumb
Innervation: Radial Nerve (C7 & #8211; C8)
Action: Thumb Extension

4. 2nd FINGER EXTENDER (INDEX)

Proximal Insertion: Posterior face of ulna diaphysis and interosseous membrane
Distal Insertion: Tendon of the common extensor of the 2nd finger
Innervation: Radial Nerve (C7 & #8211; C8)
Action: 2nd Finger Extension

Forearm & #8211; Lateral Region

1. BRAQUIORRADIAL

Proximal Insertion: 2/3 proximal to the lateral supracondylar ridge of the humerus
Distal Insertion: Radio styloid process
Innervation: Radial Nerve (C5 and C6)
Action: Elbow Flexion, Forearm Pronation and Supination to Neutral Point

2. LONG RADIAL Carpal Extender

Proximal Insertion: Lateral face of distal 1/3 of supracondylar humerus crest
Distal Insertion: Posterior face of the 2nd metacarpal
Innervation: Radial Nerve (C6 and C7)
Action: Wrist Extension and Hand Abduction (radial deviation)

3. SHORT RADIAL Carpal Extender

Proximal Insertion: Lateral humeral epicondyle
Distal Insertion: Posterior face of the 3rd metacarpal
Innervation: Radial Nerve (C7 & #8211; C8)
Action: Wrist Extension

4. SUPINATOR

Proximal Insertion: Lateral humeral epicondyle and radial collateral ligament
Distal Insertion: Lateral and proximal 1/3 face of radius diaphysis
Innervation: Radial Nerve (C6 and C7)
Action: Forearm Supination

Forearm Muscles Previous View & #8211; Superficial Dissection

Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000.

Forearm Muscles Rear View & #8211; Superficial Dissection

Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000.

Forearm Muscles Rear View & #8211; Deep Dissection

Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000.

Forearm Muscles Rotators

Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000.

Forearm Muscles Previous View & #8211; Flexors

Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000.

Forearm Muscles Previous View & #8211; Flexors

Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000.

Forearm Muscles Previous View & #8211; Flexors

Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000.

Forearm Muscles Rear View & #8211; Extenders

Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000.

Forearm Muscles Rear View & #8211; Extenders

Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000.

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