*** Wrist Joint (Kinesiology Lab)
- Abduction
Radial deviation - alternate terminology?
Posterior muscles - Extensor carpi radialis longus - Extensor carpi radialis brevis - Extensor carpi ulnaris
Radial nerve - innervates what muscles of the wrist? (4)
- Biaxial - Flexion/extension - Circumduction (circular) movement
Radiocarpal Joint - What type of movement? (2)
- Hyperextension - Dorsiflexion
Extension - alternate terminology? (2)
- Origin - Lateral epicondyle of Humerus - Insertion - Base of 3rd metacarpal
Extensor carpi radialis brevis - Origin/insertion
- Origin - Supracondylar ridge of the Humerus - Insertion - Base of 2nd metacarpal
Extensor carpi radialis longus - Origin/insertion
- Origin - Lateral epicondyle of Humerus - Insertion - Base of 5th metacarpal
Extensor carpi ulnaris - Origin/insertion
- Extensor carpi radialis longus - Extensor carpi radialis brevis - Extensor carpi ulnaris
Extensors (3)
- Shock absorber - Filler between carpals & ulna
- Articular disk of the wrist - Function (2)
- Located on distal ulna - Articulates with the triquetrum & lunate
- Articular disk of the wrist - Location
- Lateral epicondyle (Most)
- Common proximal attachment for wrist extensors?
- Medial epicondyle
- Common proximal attachment for wrist flexors?
Metacarpal
- Distal attachment for all wrist muscles is a what?
- Posterior side of the distal radius - Posterior side of the Scaphoid, lunate & triquetrum
- Dorsal radiocarpal ligament - Attachment sites (4)
- Limits wrist flexion
- Dorsal radiocarpal ligament - What is it, What does it do?
- Encloses the radiocarpal joint - Is reinforced by ligaments
- Joint capsule - What does it do? (2)
- Flexor carpi ulnaris - Flexor carpi radialis - Palmaris longus
- Muscles of the wrist - Anterior side (3)
- Extensor carpi radialis - Extensor carpi radialis brevis -Extensor carpi ulnaris
- Muscles of the wrist - Posterior side (3)
Their ACTION and SIDE
- Names of the muscles tell what?
- Flexor retaniculum
- Palmar fascia (Palmar aponeurosis) - What blends into it?
- Covers the tendons of the extrinsic muscles - Provides some protection to the structures in the palm
- Palmar fascia (Palmar aponeurosis) - What does it do? (2)
- Located superficially in the palm of the hand
- Palmar fascia (Palmar aponeurosis) - Where is it?
- Anterior side - Distal radius & ulna - Anterior surface of the scaphoid, lunate & truquetrum
- Palmar radiocarpal ligament - Attachment sites (5)
- Thick & tough - Limits wrist extension
- Palmar radiocarpal ligament - What is it, What does it do? (2)
- Most activities are performed with the wrist in slight extension
- Palmar radiocarpal ligament - Why is it so important to wrist function?
- Palmar radiocarpal ligament
- Which is stronger - Dorsal radiocarpal ligament or Palmar radiocarpal ligament?
- Styloid process of the ulna - Pisiform - Triquetrum
-Ulnar collateral ligament - Attachment sites - Ulnar side (3)
- Provide medial support to the wrist
-Ulnar collateral ligament - What does it do?
- Palmar flexion
Flexion - alternate terminology?
- Origin - Medial epicondyle of Humerus - Insertion - Base of 2nd & 3rd Metacarpals
Flexor carpi radialis - Origin/insertion
- Origin - Medial epicondyle of Humerus - Insertion - Pisiform & base of 5th Metacarpal
Flexor carpi ulnaris - Origin/insertion
- Flexor carpi radialis - Flexor carpi ulnaris
Flexors (2)
Anterior muscles on the radial side - Flexor carpi radialis - Palmaris longus
Median nerve - innervates what muscles of the wrist? (3)
- Non axial - gliding motion - Irregular, plane joints
Midcarpal - What type of movement?
- Extension
Neutral - alternate terminology?
Extensor carpi radialis longus - Wrist extension - Radial deviation
(Action?) (2)
Extensor carpi ulnaris - Wrist extension - Ulnar deviation
(Action?) (2)
Flexor carpi radialis - Wrist flexion - Radial deviation
(Action?) (2)
Flexor carpi ulnaris - Wrist flexion - Ulnar deviation
(Action?) (2)
Midcarpal (Intercarpal) - Between the two rows of carpal bones - Contributes to wrist motion
(B)
- Articular disk of the wrist
(Blue)
Radiocarpal - Between the radius & carpals - Synovial, condyloid joint
(A) (3)
Palmaris longus - Wrist flexion
(Action?)
Extensor carpi radialis brevis - Wrist extension - Radial deviation (assists)
(Action?) (2)
- Radial collateral ligament -Ulnar collateral ligament - Palmar radiocarpal ligament - Dorsal radiocarpal ligament
Basic ligaments of the radiocarpal joint? (4)
- Anterior (palmar) side - Concave - Posterior side - Convex
Bones of the wrist - What is the shape on the anterior & posterior sides? (2)
- In an arch
Bones of the wrist - how are short bones arranged?
- Trapezium (Tm) - Trapezoid (Td) - Capitate (C) - Hamate (H)
Carpal bones - distal row (lateral to medial)
- Scaphoid (S) - Lunate (L) - Truquetrum (Tq) - Pisiform (P)
Carpal bones - proximal row (lateral to medial)
- Radiocarpal - Midcarpal
Complex wrist joints (2)
- Styloid process of the radius - Scaphoid bone - Trapezium bone
Radial collateral ligament - Attachments sites - Radial side (3)
- Provide lateral support to the wrist
Radial collateral ligament - What does it do?
- Flexor carpi radialis - Extensor carpi radialis longus
Radial deviation (2)
No
Is the ulna part of the radiocarpal joint?
No - missing in about 1/5 of population
Palmaris longus - Does everyone have one?
- Origin - Medial epicondyle of Humerus - Insertion - Palmar fascia (Palmar Aponeurosis)
Palmaris longus - Origin/insertion
- Flexor carpi ulnaris - Extensor carpi ulnaris
Ulnar deviation (2)
- Adduction
Ulnar deviation - alternate terminology?
Anterion muscles on the ulnar side - Flexor carpi ulnaris
Ulnar nerve - innervates what muscle of the wrist? (2)
- Extensor carpi radialis longus
What attaches at the Supracondyle ridge of the humerus?
- Extensor tendons
What commonly attaches at the Lateral epicondyle of the humerus?
- Flexor tendons
What commonly attaches at the Medial epicondyle of the humerus?
- Extension - 0-70 degrees
Wrist movement?
- Flexion - 0-90 degrees
Wrist movement?
- Neutral position
Wrist movement?
- Radial deviation - 0-25 degrees
Wrist movement?
- Ulnar deviation - 0-35 degrees
Wrist movement?
