Muscles of the Anterior forearm Flashcards
What are the 3 layers of muscle in the forearm?
Superficial
Intermediate
Deep
What is the general action of muscles in the anterior forearm?
Flexion at wrist
Flexion at fingers
Pronation
What are the 4 suoerficial muscles in the anterior forearm?
Pronator teres
Flexor carpi radialis
Palmaris Longua
Flexor carpi ulnaris
What is important about the 4 superficial muscles in the anterior forearm?
The all have a common tendon that originates at the medial epichondyle
What is the main action of flexor carpi ulnaris?
Flexion at the wrist
Adduction at the wrist
What nerve innervates the flexor carpi ulnaris?
The ulnar nerve
What lies directly underneath the Palmaris longus at the wrist?
The median nerve
What innervates the Palmaris longus?
The median nerve
What is the main action of the Palmaris longus?
Flexion at the wrist
What is the main action of Flexor carpi radialis?
Abduction at the wrist
Flexion at the wrist
What nerve innervates the Flexor carpi radialis?
The median nerve
What is the main action of Pronator teres?
Pronation of the forearm
What nerve innervates Pronator teres?
The median nerve
What is the intermediate muscle in the forearm?
Flexor digitorum superficialis
What is special about the Flexor digitorum superficialis?
It has 2 heads, the median nerve and Ulnar artery passes through these
What is the main action of Flexor digitorum superficialis?
Flexes at the wrist
Flexes metacarpophalangeal joint
Flexes proximal interphalangeal joint
What innervates the Flexor digitorum superficialis?
The median nerve
What are the 3 muscles in the deep layer of the anterior forearm?
Flexor digitorum profundus
Flexor pollicis longus
Pronator quadratus
What is the main action of the Flexor digitorum profundus?
Flex distal interphalangeal joint
Flex metacarpophalangeal joint
Flex at the wrist
What innervates the Flexor digitorum profundus?
Medial half - Ulnar nerve
Lateral half - Median nerve
Where is Flexor pollicis longus in relation to Flexor digitorum profundus?
Laterally
What is the main action of Flexor pollicis longus?
Flex interphalangeal joint of the thumb
Flex Metacarpophalangeal joint of the thumb
What innervates Flexor pollicis longus?
Median nerve
Where is Pronator quadratus in relation to Flexor pollicis longus and Flexor digitorum profundus?
Deep
What is the main action of Pronator quadratus?
Pronation of the forearm
What innervates Pronator quadratus?
The median nerve
