Flashcards in Muscles of the Anterior Forearm Deck (62)
This part of the forearm serves as an attachment site for many muscles
The anterior compartment of the forearm performs what actions?
Nerves that innervate the anterior compartment of the forearm
Median and Ulnar Nerve
The posterior compartment of the forearm performs what actions?
Extension and supination
All of the muscles of the posterior compartment are innervated by
The Radial Nerve
Because many of the muscles of the forearm originate from the humerus, which causes the muscles in to be located where in the forearm?
What does this accomplish?
The muscles are located proximally. This allows the wrist and hand to be less bulky.
The 5 superficial muscles of the anterior forearm are...
1. Pronator Teres
2. Flexor Carpi Radialis
3. Palmaris Longus
4. Flexor Carpi Ulnaris
5. Flexor Digitorum Superficialis
All of the muscles of the anterior compartment of the forearm attach to the common flexor tendon which originates off of....
the medial epicondyle of the humerus
Most of the muscles of the forearm are innervated by
The median nerve
Round, tubular shaped muscle that extends from common flexor to halfway down the radius
Origin of the pronator teres
Medial epicondyle of the humerus and somewhat off the coronoid process of the ulna
What passes through the small opening on the pronator teres where the muscle originates?
Where does pronator teres insert?
Radius, lateral side midway down
What nerve innervates the pronator teres
What action is the pronator teres responsible for?
What other action can it assist with?
Flexion at the elbow
Anterior muscle of the forearm that acts with the flexor carpi ulnaris to help flex the wrist
It cannot also help flex the elbow
Flexor Carpi Radialis
When acting alone or with extensors, what movement does the flexor carpi radialis perform?
Abducts the wrist
What structure is located laterally to the flexor carpi radialis?
Where does the flexor carpi radialis insert?
The base of the 2nd and 3rd metacarpals
What is the sheet that carpi muscles must pass through when crossing wrist?
What innervates the flexor carpi radialis?
This muscle lies superficial to flexor digitorrum and is fairly small, has little affect on wrist strength
Palmaris Longus (Absent in 15% of ppl)
What is the insertion of the palmaris longus?
Medial epicondyle of the humerus
Fascia covering the palm of the hand
Action of the palmaris longus
Flex the wrist
What lies just lateral to the palmaris longus, between the palmaris longus and flexor carpi radialis?
The median nerve
The most medial muscle of the superficial flexors
Flexor Carpi Ulnaris
What action does the flexor carpi ulnaris have when working with other flexors?
What about when it acts with extensors?
Has some ability to do this because it crosses the elbow joint
Adduct the wrist
Flex the elbow
What innervates the flexor carpi ulnaris?