Elbow & Wrist Muscles

Question 1

Palmaris Longus

Answer 1

Origin: Medial epicondyle of the humerus
Insertion: Flexor reticulum & palmar retinaculum
Function: Flexion of the wrist
Innervation. Median Nerve

Question 2

Flexor Carpi Radialis

Answer 2

Origin: Medial epicondyle of the humerus
Insertion: Base of the 2-3 metacarpal
Function: Flexion & abduction of the wrist
Innervation: Median nerve

Question 3

Pronator Teres

Answer 3

Origin: The humeral head & ulnar head
Inssertion: Middle of the lateral surface of the radius
Function: Pronates the forearm & assist in flexion of the elbow

Question 4

Flexor Carpi Ulnaris

Answer 4

Origin: Olecreanon and posterior border of the ulna & the medial epicondyle of the humerus
Insertion: Pisiform & hook of hamate & base of 5th metacarpal
Function: Flexion & adduction of the wrist.

Question 5

Flexor Digitorium Superficialias

Answer 5

Origin: medial epicondyle of the humerus and medial border of the coronoid process of the ulna & the anterior oblique line of shaft of the radius.
Insertion: The middle and ring fingers (superficial) & Index and little fingers (deep)
Function: flexor of the fingers 2 and 5 and help wrist flexion.
Innervation: Median nerve

Question 6

Extensor Digitorum

Answer 6

Origin: Lateral epicondyle of the humerus
Insertion: Extensor expansion of the medial 4 digits
Function: Extends the medial 4 digits & extends the wrist
Innervation: Radial merve

Question 7

Extensor Carpi Ulnaris

Answer 7

Origin: Lateral epicondyle of the humerus
Insertion: Dorsal base of the 5th metacarpal
Function: Extends & adduct the wrist & medial stability to the wrist
Innervation: Radial nerve

Question 8

Extensor Digiti minimi

Answer 8

Origin: Lateral epicondyle of the humerus
Insertion: Base of the 5th proximal phalange on the dorsal side
Function: Extends the 5th finger & wrist
Innervation: Posterior Interosseous nerve

Question 9

Extensor Carpi Radialis Brevis

Answer 9

Origin: Lateral epicondyle of the humerus
Insertion: Dorsal surface of the base of the 3rd metarcarpal
Function: Extends & abducts the wrist
Innervation: Radial nerve

Question 10

Extensor Carpi Radialis Longus

Answer 10

Origin: Anterior lower third of the lateral supracondylar ridge of the humerus & adjacent intermuscular septum
Insertion: Dorsal surface of the base of the 2nd metacarpal
Function: Extends and abducts the wrist
Innervation: Radial nerve

Question 11

Brachioradialis

Answer 11

Origin: Lateral supracondylar rigid of the humerus & lateral intermuscular septum
Insertion: Styloid process of the radius
Function: Flexion of the forearm at the elbow & move the and to a neutral position
Innervation: Radial nerve

Question 12

Flexor Digitorum Profondus

Answer 12

Origin: Upper and anterior medial surface of the shaft of the ulna
Insertion: 4 medial digits
Function: Flexes the fingers
Innervation: lateral & median nerve

Question 13

Pronator Quadratus

Answer 13

Origin: Oblique ridge on the anterior surface of the distal fourth of the ulna
Insertion: lateral and anterior surface of the distal fourth of the radius
Function: Pronation of the radiouknar joint
Innervation: median nerve

Question 14

Flexor Pollicis Longus

Answer 14

Origin: mid-half of the anterior surface of the radius
Insertion: base of the distal phalanx
Function: flexion of the thumb
Innervation: median nerve

Question 15

Extensor Pollicis Longus

Answer 15

Origin: mid third of the ulna
Insertion: base of the distal phalanx
Function: extends the interphalangeal & wrist extension
Innervation: Radial nerve

Question 16

Extensor Indicis

Answer 16

Origin: Posterior surface of the Ulna
Insertion: Base of the 2nd proximal phalanges & tendon of the extensor digitorum
Function: Extends the second digit & wrist extension & supination of the forearm
Innervation: Radial nerve

Question 17

Extensor Pollicis Brevis

Answer 17

Origin: Lower third of the posterior surface of the radius
Insertion: Base of the proximal phalanx of the thumb
Function: Extends the thumb
Innervation: Radial nerve

Question 18

Extensor Pollicis Longus

Answer 18

Origin: Ulna & interosseous membrane & radius
Insertion: Base of the metacarpal
Function: Extends & extension of the thumb
Innervation: Radial nerve