MUSCLES FOREWORD
The muscles of the Forearm are divided into 3 regions:
- Previous Region
- Lateral Region
- Later Region
Previous Region | Later Region | |
1st layer Pronator Round Radial Carpal Flexor Palmar Long Ulnar Carpal Flexor 2nd layer Superficial Finger Flexor
3rd layer Deep Finger Flexor 4th layer Square Pronator |
Surface layer
Finger Extender Deep layer Thumb Long Abductor |
Lateral Region |
Brachioradialis Long Radial Carpal Extender Short Radial Carpal Extender Supinador |
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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R
Later 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 |
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Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000. |
Forearm Muscles Rear View & #8211; Superficial Dissection |
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Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000. |
Forearm Muscles Rear View & #8211; Deep Dissection |
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Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000. |
Forearm Muscles Rotators |
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Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000. |
Forearm Muscles Previous View & #8211; Flexors |
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Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000. |
Forearm Muscles Previous View & #8211; Flexors |
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Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000. |
Forearm Muscles Previous View & #8211; Flexors |
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Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000. |
Forearm Muscles Rear View & #8211; Extenders |
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Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000. |
Forearm Muscles Rear View & #8211; Extenders |
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Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000. |
Superior Member |
Shoulder |