Anterior forearm Flashcards
What are the 4 superficial muscles that make up the anterior forearm?
- Flexor carpi ulnaris
- Palmaris longus
- Flexor carpi radialis
- Pronator teres
What 3 superficial muscles of the anterior forearm are innervated by the median nerve?
Flexor carpi radialis
Palmaris longus
Pronator teres
Where do all 4 superficial muscles of the anterior forearm originate from?
Medial epicondyle of the humerus
What is the innervation of the flexor carpi ulnaris?
Ulnar nerve
Where does the flexor carpi ulnaris insert?
Into the pisiform carpal bone
What are the actions of flexor carpi ulnaris?
Flexion and adduction of the wrist
Which muscle is absent in around 15% of the population?
Palmaris longus
What is the insertion of Palmaris longus?
Into the flexor retinaculum of the wrist
What is action of the palmaris longus?
Flexion of the wrist
What is the insertion of flexor carpi radialis?
Base of the metacarpal I and II
What are the actions of flexor carpi radialis?
Flexion and adduction of the wrist
What muscles forms the lateral head of the cubital fossa?
Pronator teres
What is action of pronator teres?
Pronation of the forearm
What is the cubital fossa?
The triangular region in front of the elbow
What are the 4 structures contained in the triangular fossa?
- Brachial artery
- Median nerve
- Radial nerve
- Superficial veins
What muscle forms the lateral boundary of the cubital fossa?
Brachioradialis
What muscles forms the medial border of the cubital fossa?
Pronator teres
What 2 structures form the roof of the cubital fossa?
Deep fasica reinforced by the bicipital aponeurosis
What 2 muscles form the floor of the cubital fossa?
mostly brachialis and supernator laterally
What artery divides into 2 at the cubital fossa?
Brachilal artery
What does the brachial artery divide into?
Radial and ulnar artery
What lies lateral to the flexor carpi radialis at the wrist?
Radial artery
What muscle does the radial artery lie lateral to at the wrist?
Flexor carpi radialis
What structure lies lateral to the pisiform in the anterior arm?
Ulnar artery
What carpal bone does the ulnar artery lie lateral to in the wrist of the anterior forearm?
Pisiform
What is the only muscle that forms the intermediate layer of the anterior forearm?
Flexor digitorium superficialis
What is the origin of flexor digitorium superficialis?
Medial epicondyle of the humerus
What 2 structures pass between the 2 heads of flexor digitorium superficialis?
Median and ulnar artery
Where does the flexor digitorium superficialis insert into?
Middles phalanges of the 4 fingers
What is the innervation of the flexor digitorium superficialis
Median nerve
What are the 3 deep muslces that make up the anteriro forearm?
Flexor digitorium profundus
Flexor pollicis longus
Pronator quadratus
