Front Of Forearm Muscles Flashcards
What is the origin of the Pronator teres muscle?
Humeral head from common flexor origin; Ulnar head from coronoid process of ulna
The Pronator teres has two heads, each originating from different locations.
What is the insertion point of the Flexor digitorum superficialis?
Middle phalanges of all fingers
The Flexor digitorum superficialis allows for flexion of the PIP joints.
Which nerve supplies the Flexor carpi radialis?
Median nerve
The median nerve is responsible for innervating several forearm flexors.
Name the three deep muscles of the front of the forearm.
- Flexor pollicis longus (FPL)
- Flexor digitorum profundus (FDP)
- Pronator quadratus
These muscles are located deeper compared to the superficial muscles of the forearm.
What is the action of the Flexor digitorum profundus?
Flexion of PIP joints of all fingers
The FDP is crucial for grip strength and finger flexion.
True or False: The Flexor digitorum profundus has dual innervation.
True
It is innervated by both the median and ulnar nerves.
Fill in the blank: The _______ is the most powerful and bulky muscle of the forearm.
Flexor digitorum profundus
This muscle is essential for providing gripping power.
What is the insertion point of the Flexor pollicis longus?
Palmar aspect of the base of the distal phalanx of the thumb
The FPL is responsible for thumb flexion.
What clinical test is used to assess the integrity of the median nerve?
Ask the patient to flex the DIP joint while holding the PIP joint in extension
This test specifically evaluates the function of the Flexor digitorum profundus.
What is the origin of the Flexor digitorum profundus?
Upper three-fourths of the anterior and medial surfaces of the shaft of the ulna and adjacent medial half of the interosseous membrane
The origin provides a strong base for the muscle’s action.
What is the action of the Pronator quadratus?
Pronation of forearm
This muscle is located distally in the forearm, aiding in pronation.
What is the nerve supply for the Flexor carpi ulnaris?
Ulnar nerve
The ulnar nerve innervates muscles on the medial side of the forearm.
What is the insertion of the Flexor carpi ulnaris?
Pisiform bone
The insertion allows for adduction and flexion at the wrist.
True or False: The Flexor digitorum superficialis is absent in 10-15% of cases.
True
This anatomical variation can affect hand function.
What is the action of the Flexor carpi radialis?
Flexion and abduction at the wrist
This muscle assists in wrist movements.
