Superficial, intermediate, deep muscles of anterior forearm Flashcards
Where is the flexor carpi ulnaris, and where do the 2 heads attach to?
4, the humeral head attaches to the common flexor tendon origin, the medial epicondyle
The ulnar head attaches to the olecranon
What 3 bony structures does the flexor carpi ulnaris attach to?
Passes to medial side of wrist then attaches to:
Hook of hamata
Pisiform
5th metacarpal base
What are the 2 actions of the flexor carpi ulnaris?
Wrist flexion
Wrist adduction
What nerve supplies flexor carpi ulnaris?
Ulnar nerve
Where is the palmaris longus, and where is its origin and attachment?
1, palmaris longus originates from common flexor tendon origin, the medial epicondyle of humerus
Palmaris longus attaches to flexor retinaculum at wrist
What is the action of palmaris longus, and what innervates this muscle?
Wrist flexion
Innervated by median nerve
What is meant by palmaris longus being a vestigial muscle?
Had function in earlier species but through evolution has become functionless/little function left
Is palmaris longus present in all individuals?
No, palmaris longus is absent in 15% population
Where is the flexor carpi radialis, and what are its origin and attachment sites?
3, flexor carpi radialis originates from medial epicondyle of humerus and attaches to bases of 2nd and 3rd metacarpals
What are the 2 actions of flexor carpi radialis, and what nerve innervates it?
Wrist flexion and abduction
Innervated by median nerve
Where is pronator teres, and what are its origin and attachment sites?
2, it originates from medial epicondyle of humerus and coronoid process of ulna, and attaches to lateral mid-shaft surface of radius
What are the 2 actions of pronator teres, and what nerve innervates it?
Forearm pronation (main action)
Elbow flexion (weaker action)
Innervated by median nerve
Why do all of the superficial muscles of the anterior forearm originate from the medial epicondyle of the humerus?
They all originate from the common flexor tendon, which originates from the medial epicondyle
What anatomical structure near the elbow is pronator teres a part of, and describe its role?
Cubital fossa: upside down triangular depression on anterior surface of elbow
Pronator teres forms medial border
How many intermediate muscles are there in the anterior forearm?
1