Muscles of the Antebrachium : Flexors

Question 1

Flexor Carpi Radialis

Answer 1

O : Medial epicondyle of the humerus via the common flexor tendon
I : Bases of 2nd and 3rd metacarpals
A :
1. Flex the hand at the wrist joint
2. Radially deviate the hand at the wrist joint

Question 2

Palmaris Longus

Answer 2

O : Medial epicondyle of the humerus via the common flexor tendon
I : Flexor retinaculum and palmar aponeurosis
A : Flex the hand at the wrist joint

Question 3

Flexor Carpi Ulnaris

Answer 3

O : Medial epicondyle of the humerus via the common flexor tendon
I : Anterior, ulnar side of the pisiform, hook of hamate and base of the 5th metacarpal
A :
1. Flex the hand at the wrist joint
2. Ulnar deviates the hand at the wrist joint

Question 4

Flexor Digitorum Superficialis

Answer 4

O (Humeroulnar Head) : Medial epicondyle of the humerus via the common flexor tendon and coronoid process of the ulna
O (Radial Head) : Proximal 1/2 of the anterior shaft of the radius
I : Anterior surface of the middle phalanges of 2nd-5th digits
A :
1. Flex the 2nd-5th digits at MCP and PIP
2. Flex the hand at the wrist joint

Question 5

Flexor Digitorum Profundus

Answer 5

O : Proximal 1/2 of medial and anterior ulna and interosseous membrane
I : Anterior surface of distal phalanges 2-5
A :
1. Flex 2nd-5th digits at MCP, PIP and DIP
2. Flexes the hand at the wrist joint

Question 6

Flexor Pollicis Longus

Answer 6

O : Anterior surface of radius, interosseous membrane, the medial epicondyle of the humerus, and the coronoid process of the ulna
I : Anterior aspect of the base of the distal phalanx of the thumb
A :
1. Flex the thumb at the CMC, MCP and IP joints
2. Flexes the hand at the wrist joint