Arthrology of the elbow wrist and hand

Question 1

What kind of joint is the humeroulnar joint ?

Answer 1

Hinge joint

Question 2

What kind of joint is the humeroradial joint ?

Answer 2

plane/ gliding

Question 3

What kind of joint is the proximal-radioulnar joint ?

Answer 3

pivot

Question 4

What kind of joint is the distal radio-ulnar joint ?

Answer 4

pivot

Question 5

What kind of joint is the Radiocarpal joint ?

Answer 5

ellipsoidal or condyloid

Question 6

What kind of joint is the carpometacarpal joint ?

Answer 6

First: sellar/saddle
2nd-5th: plane gliding

Question 7

What kind of joint is the Metacarpophalangeal joint?

Answer 7

ellipsoidal

Question 8

What kind of joint is the interphalangeal joint ?

Answer 8

hinge

Question 9

Where does the ulnar or medial collateral ligament of the elbow attach?

Answer 9

From the medial epicondyle of the humerus too the medial margin of the coronoid process and olecranon process

Question 10

What is the function of the Ulnar collateral ligament of the elbow?

Answer 10

resists cubital valgus * important roll between 20-130 deg. of motion

Question 11

What are the three bands of the ulnar collateral ligament ?

Answer 11

Anterior
Posterior
Transverse

Question 12

What is the most commonly ruptured band of the ulnar collateral ligament?

Answer 12

Anterior band: usually ruptured at end range extension

Question 13

What does the anterior bundle of the ulnar collateral ligament resist?

Answer 13

Primarily resists elbow valgus between 20-120 deg. of motion

taught w/terminal extension

secondary restraint at end range flexion beyond 120 deg.

strongest

Question 14

What does the posterior band of the ulnar collateral lig. restrict?

Answer 14

Also resists elbow valgus : acts as a co restraint at end range / terminal flexion with anterior band

2nd restraint to valgus stress at lesser deg. of flexion

taught at 55 deg. of elbow flexion

weakest

Question 15

What is the purpose of the transverse /oblique bundle of the ulnar collateral ligament

Answer 15

deepens socket for trochlea of the humerus

Question 16

What are the attachments for the annular ligament?

Answer 16

From the anterior margin of the radial notch of the ulna to the posterior margin of the radial notch of the ulna surrounding the head of the radius

Question 17

What is the function of the triangular fibrocartilage complex ligament?

Answer 17

1. Stabilize distal radial joint by binding the radius and ulna
2. Transfer compression forces from hand and wrist to the forearm
3. Cushion ulnar side force transmission

Question 18

What is the function of the annular ligament?

Answer 18

stabilizes proximal radial ulna joint / radial head

Question 19

What are the components of the Triangular fibrocartilage complex (TFCC)

Answer 19

1. Biconcave fibrocartilage disc
2. Palmar Ulnocarpal ligament
   3.Ulnar collateral ligament

Question 20

What is the function of the annular ligament?

Answer 20

Stabalizes proximal radioulnar joint

Question 21

What is the attachments of the interosseous membrane?

Answer 21

from interosseous border of radius to interosseous border of ulna

Question 22

What is the attachment of the lateral / radial collateral ligament of the elbow?

Answer 22

Lateral epicondyle to the annular ligament

Question 23

What is the function of the Transverse carpal ligament?

Answer 23

Prevents bowstringing of the tendons of the FPL,FDS,FDP

Question 24

What is the attachments of the transverse carpal ligament?

Answer 24

From the pisiform and hook of hamate to scaphoid and trapezium

Question 25

What is the function of the Volar/Palmar and Dorsal radiocarpal ligaments?

Answer 25

Stabalize the carpal bones on the radius

Question 26

What are the attachments of the radoiocarpal ligaments?

Answer 26

dorsal/volar surface of the distal radius to the first two rows of the carpal bones

Question 27

What is the function of the ulnar collateral lig. of the wrist ?

Answer 27

resists radial deviation

Question 28

What is the attachments of the ulnar collateral lig. of the wrist?

Answer 28

From the ulnar styloid process to the triquetrum

Question 29

What is the function of the radial collateral lig. of the wrist ?

Answer 29

resists ulnar deviation

Question 30

What is the attachments of the radial collateral lig. of the wrist?

Answer 30

radial styloid process to scaphoid

Question 31

Attachments of the collateral lig. of the metacarpophalangeal joints

Answer 31

From the head of the metacarpals to the base of the proximal phalanx

Question 32

Injury to the TFF

Answer 32

FOOSH extension with ulnar compression forced radial or ulnar deviation strong distraction force disc and ligament damage