Movements Flashcards
Describe flexion of the wrist and which joints it occurs
action of bending your hand down at the wrist, so that your palm faces in toward your arm
60% movement at midcarpal joint
40% movement at radiocarpal joint
Describe extension of the wrist and which joints it occurs
Action of bending hand backward, so that your palm is facing up
60% movement at radiocarpal joint
40% movement at midcarpal joints
Describe radial deviation of the wrist and joint it occurs at
movement of bending the wrist to the thumb, or radial bone
Majority of movement at radiocarpal joint
Describe ulna deviation of the wrist and which joints it occurs at
movement of bending the wrist to the little finger, or ulnar bone, side
Majority of movement at radiocarpal joint
Describe pronation of forearm and the joints it occurs
from mid-prone (neutral) and 90 degrees elbow flexion:
When palmar surface of forearm and hand face down; when radius crosses the ulna
Occurs at radio-ulnar joints and humero-radial joint
At Humero-radial joint - superior articular surface of the radial head spins on the capitulum
At superior RUJ - articular surface on the side of radial head slides within radial notch of ulna and adjacent annular ligament
At inferior RUJ - ulnar notch of the radius slides anteromedially over the convex surface of the head of the ulna so distal radius becomes medial to the ulna
State limiting factors of pronation of the forearm
Bony apposition of radius on Ulna
Tension in ligaments: Quadrate lig and dorsal radioulnar lig of distal RU jnt, Interosseous Membrane
Tension in antagonist :Supinator, biceps brachii
Describe supination of the forearm and which joints it occurs
from mid-prone (neutral); 90 degrees elbow flexion & thumb facing up:
Radius is parallel to the fixed ulna, lying lateral to it at both the superior and inferior RUJ
State limiting factors of supination of the forearm
tension in Pronator teres, pronator quadratus
Tension in ligaments: quadrate lig, palmer radioulnar lig of
Inferior RUJ, Interosseous Membrane
State limiting factors of wrist flexion
Tension in Post radiocarpal lig + Post Joint capsule
State limiting factors of wrist extension
Tension in Anterior radiocarpal lig + Anterior Joint capsule,
Bony apposition of radius + carpal bone
State limiting factors of radial deviation of the wrist
tension in ulna collateral ligament
bony apposition - contact between radial styloid process and scaphoid
State limiting factors of ulna deviation of the wrist
tension in radial collateral ligament
State normal ROM of wrist flexion
85 degrees
State normal ROM of wrist extension
85 degrees
State normal ROM of radial deviation
15 degrees
State normal ROM of ulna deviation
45 degrees
State normal ROM of supination of forearm
90 degrees
State normal ROM of pronation of wrist
80-90 degrees
State close packed position of wrist
Full extension with radial deviation
State factors of wrist stability
Relatively stable due to:
The many tendons crossing the joints (plus Pronator Quadratus)
Ligaments - anteriorly, posteriorly , medially and laterally
Radiocarpal, Intercarpal ligaments
Tendons bound by extensor and flexor retinaculum
○ Flexor retinaculum (anteriorly)
§ Considered by some as accessory ligament
§ Attaches to high points on pisiform and hamate, scaphoid and trapezium
§ Forms roof of carpal canal (tunnel)
Close Pack position: Extension with Radial deviation