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T1 & T2 Anatomy > Arm & Hand > Flashcards

Flashcards in Arm & Hand Deck (102)
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1

What does the lateral (radial) collateral ligament attach and what does it check?

-lateral epicondyle (of humerus) -- annular ligament of the raduis -prevents excessive cubitus varus deviation

2

What does the medial (ulnar) collateral ligament attach and what does it check?

-medial epicondyle (of humerus) -- coronoid process, olecranon process -prevents excessive cubitus valgus deviation

3

What kind of joint is the proximal radioulnar?

synovial pivot

4

What are the specific articulations of the proximal radioulnar joint?

head of the radius -- radial notch of ulna

5

Describe the movement, and available movements, of the proximal radioulnar joint.

-head of the radius can move against the ulna (the head rotates within the ring formed by the annular ligament) -pronation; supination

6

This u-shaped ligament runs from the anterior surface of the radial notch around the head of the radius to the posterior surface of the radial notch, and holds the head of the radius in place.

annular ligament

7

What are the specific articulations of the distal radioulnar joint?

head of the ulna -- ulnar notch of the radius

8

Describe the movement, and available movements, of the distal radioulnar joint.

-allows for movement of the radius around a relatively fixed ulna -pronation; supination

9

What kind of joint is the proximal radioulnar?

-synovial pivot

10

What are the ligaments of the distal radioulnar joint?

palmar and dorsal radioulnar ligaments: distal ulna -- distal radius (dorsal and palmar surfaces)

11

What are the attachment points of coracobrachialis?

S/P: coracoid process I/D: middle, medial humerus

12

What are the actions of coracobrachialis?

-G-H flexion -G-H adduction

13

What are the attachment points of biceps brachii?

S/P (long head): supraglenoid tubercle (the biceps long head travels through the bicipital groove to its proximal attachment -- the tendon has a sheath to protect it from the transverse humeral ligament which holds the tendon in place during contraction/movement) S/P (short head): coracoid process I/D: radial tuberosity, bicipital aponeurosis (fascia that runs from the biceps tendon and merges with the fascia of the anterior forearm)

14

What are the actions of biceps brachii

-G-H flexion -elbow flexion (prime mover for elbow flexion when in supination) -forearm supination (proxiomal and distal radioulnar joints)

15

What are the attachment points of brachialis?

S/P: anterior distal 1/2 of humerus I/D: ulnar tuberosity, coronoid process

16

What are the actions of brachialis?

elbow flexion (prime mover)

17

What are the attachment points of triceps brachii

S/P (long head): infraglenoid tubercle S/P (lateral head): posterior proximal humerus (superior to the radial groove) S/P (medial head): posterior distal humerus (inferior to the radial groove) I/D: olecranon process

18

What are the actions of triceps brachii?

-long head: G-H extension -all heads: elbow extension

19

What are the attachment points of anconeus?

S/P: lateral epicondyle (of humerus) I/D: olecranon process

20

What are the available movements of anconeus?

elbow extension (assists triceps -- weak synergist)

21

 

What are the groups of bones in the hand?

 

 

-the carpal bones (8) -the metacarpals (5) -the phalanges (14)

 

22

What are the proximal carpal bones?

-scaphoid (sometimes called the navicular) (including its tubercle) (most commonly fractured carpal bone) -lunate (most commonly dislocated carpal) -triquetrum (pyramid-shaped) -pisiform (easily palpable; sesamoid bone)

23

What are the distal carpal bones?

-trapezium (including its tubercle) (think rhymes with thumb) -trapezoid -capitate -hamate (easily identified by the anterior projection called the hook of the hamate)

24

Where does the flexor retinaculum of the carpal tunnel attach?

-laterally to the tubercles of the scaphoid and trapezium -medially to the hook of the hamate and pisiform

25

What are the muscles of the proximal arm?

-coracobrachialis -biceps brachii -brachialis -triceps brachii -anconeus

26

What's the most commonly fractured carpal bone?

scaphoid

27

What's the most commonly dislocated carpal bone?

lunate

28

What kind of joint is the radiocarpal?

synovial condyloid

29

What kind of joint is the midcarpal?

synovial plane

30

What kind of joints are the intercarpals?

synovial plane