Muscles of the forearm Flashcards
What are the 4 muscles of the superficial group of the anterior compartment of the forearm?
- Pronator Teres
- Flexor carpi radialis
- palmaris longus
- flexor carpi ulnaris
What are the muscles of the intermediate group of the anterior compartment of the forearm?
Flexor Digitorum Superficialis
What are the 3 muscles of the deep group of the anterior compartment of the forearm?
- Flexor Digitorum Profundus
- Flexor Pollicis Longus
- Pronator Quadratus
Where does pronator teres attach?
Lateral surface of Radius
Where does flexor carpi radialis attach?
base of metacarpals 2 and 3
Where does palmaris longus attach?
Palmar aperneuorsis of the hand
Where does flexor carpi ulnaris attach?
pisiform/hamate and the base metacarpal 5
Other than flexion wrist, what actions do flexor carpi radialis / ulnaris produce?
Flexor carpi RADIALIS = ABDUCT
Flexor carpi ULNARIS = ADDUCT
What is the nerve supply to the superificial flexors of the wrist?
Median Nerve :
- pronator teres
- flexor carpi radialis
- palmaris longus
Ulnar Nerve :
-Flexor carpi ulnaris
What is the origin and insertion of brachioradialis?
Origin : Supracondylar Ridge
Insertion : Styloid Process of radius
What is the nerve supply of brachioradialis?
Radial nerve ( C5, C6 )
To which phalanges does flexor digitorum superficialis attach?
Attaches to the middle phalanges of
- Index
- Middle
- Ring
- Little finger
what is the origin and insertion of flexor digitorum profundus?
ORIGIN :
- upper 3/4 of the anterior / medial surfaces of the ulna
- interosseous membrane
INSERTION :
-Base of the distal phalanges of digits 2-5
What is the innervation of flexor digitorum profundus?
MEDIAN nerve = Lateral half (digits 2 and 3)
ULNAR nerve = Medial half (digits 4 and 5)
Where does the median nerve lie in relation to flexor digitorum superficialis?
lies DEEP to flexor digitorum superificialis
What is the origin and insertion of flexor pollcis longus?
ORIGIN : anterior surface of Radius
(interosseous membrane)
INSERTION : base of the distal phalanx of the THUMB
What is the nerve supply of flexor pollicis longus?
Median nerve (anterior interosseous branch)
What is the origin and insertion of pronator quadratus?
ORIGIN : medial anterior surface of ULNA
INSERTION : Lateral anterior surface of RADIUS
What is the innervation of pronator quadratus?
median nerve (anterior interosseous branch)
