Lab 4 - Forearm Musculature

  Forearm Flexors    Blue: Pronator Teres    Yellow: Flexor Carpi Radialis    Green: Palmaris Longus    Red: Flexor Carpi Ulnaris

Forearm Flexors

Blue: Pronator Teres

Yellow: Flexor Carpi Radialis

Green: Palmaris Longus

Red: Flexor Carpi Ulnaris

  Flexor Carpi Ulnaris   O -
Medial epicondyle of humerus  I - Pisiform, hook of hamate and base of 5th
metacarpal, passes under flexor retinaculum   F -
Elbow flexion, wrist flexion and adduction

Flexor Carpi Ulnaris

O - Medial epicondyle of humerus

I - Pisiform, hook of hamate and base of 5th metacarpal, passes under flexor retinaculum

F - Elbow flexion, wrist flexion and adduction

  Palmaris Longus   O -
Medial epicondyle of humerus  I -
Palmar aponeurosis and flexor retinaculum   F -
Elbow flexion, wrist flexion

Palmaris Longus

O - Medial epicondyle of humerus

I - Palmar aponeurosis and flexor retinaculum

F - Elbow flexion, wrist flexion

  Flexor Carpi Radialis    O -
Medial epicondyle of humerus  I -
2nd and 3rd metacarpals, passes under flexor retinaculum  F -
Elbow flexion, wrist flexion and abduction

Flexor Carpi Radialis

O - Medial epicondyle of humerus

I - 2nd and 3rd metacarpals, passes under flexor retinaculum

F - Elbow flexion, wrist flexion and abduction

  Pronator Teres   O -
Medial epicondyle of humerus and coranoid process of ulna  I -
Midlateral surface of radius    F -
Pronation of forearm and assists with elbow flexion

Pronator Teres

O - Medial epicondyle of humerus and coranoid process of ulna

I - Midlateral surface of radius  

F - Pronation of forearm and assists with elbow flexion

  Forearm Extensors     Yellow: Extensor Carpi Radialis Longus    Blue: Extensor Carpi Radialis Brevis    Green: Extensor Digitorum    Red:  Extensor Digitorum Lateralis     Purple: Extensor Carpi Ulnaris

Forearm Extensors

Yellow: Extensor Carpi Radialis Longus

Blue: Extensor Carpi Radialis Brevis

Green: Extensor Digitorum

Red:  Extensor Digitorum Lateralis

Purple: Extensor Carpi Ulnaris

  Extensor Carpi Ulnaris   O -
Lateral epicondyle of humerus  I -
Base of 5th metacarpal  F -
Wrist extension and adduction

Extensor Carpi Ulnaris

O - Lateral epicondyle of humerus

I - Base of 5th metacarpal

F - Wrist extension and adduction

  Extensor Digitorum Lateralis - Not in Humans

Extensor Digitorum Lateralis - Not in Humans

  Extensor Digitorum    O -
Lateral epicondyle of humerus   I -
Distal and middle phalanges of each finger  F -
Wrist extension, metacarpal and interphalangeal extension

Extensor Digitorum

O - Lateral epicondyle of humerus

I - Distal and middle phalanges of each finger

F - Wrist extension, metacarpal and interphalangeal extension

  Extensor Carpi Radialis Longus and Brevis    Blue: Brevis   O -
Lateral epicondyle of humerus  I -
Base of 3rd metacarpal   F -
Wrist extension and abduction    Yellow: Longus   O -
Above lateral epicondyle of humerus   I -
Base of 2nd metacarpal  F -
Wrist extension and abduction

Extensor Carpi Radialis Longus and Brevis

Blue: Brevis

O - Lateral epicondyle of humerus

I - Base of 3rd metacarpal

F - Wrist extension and abduction

Yellow: Longus

O - Above lateral epicondyle of humerus

I - Base of 2nd metacarpal

F - Wrist extension and abduction