wednesday lecture Flashcards
Radiocarpal joint
- distal radius with the scaphoid, lunate and TFCC
- Condyloid, synovial joint
- All motions (Flexion, Extension, Radial and Ulnar deviation)
Intercarpal joint
- plane synovial joint
- between the two rows of carpal bones
- one third of wrist extension occurs here, half of wrist flexion occurs here
Ligaments of the wrist joint
- anterior and posterior ligament
- collateral ligament (Ulnar and Radial)
The ulnar and radial collateral ligament of the wrist
- ulnar collateral: attaches to the ulnar styloid process and triquetrum
- radial collateral: attaches to radial styloid process to scaphoid
What is ulnar deviation limited by?
Radial collateral ligament
What is radial deviation limit by?
Ulnar collateral ligament
Ligaments of the midcarpal joint
- anterior and posterior
- interosseous
Antebrachial fasica
- posterior thickening (Extensor retinaculum)
- anterior thickening (Flexor Retinaculum and palmar fascia)
Fracture of the scaphoid
- from a fall on an outstretched hand
- The blood supply to this bone is bad (decreased) so it takes longer to heal
Colles fracture
- “dinner fork deformity”
- fracture of the distal radius with posterior displacement of the fragment
function of the wrist
provide stable base for the hand
what 9 tendons are in the carpal tunnel? what nerve?
- Flexor Pollici Longus (1)
- Flexor Digitorum Superificalis (4)
- Flexor Digitorum Profundus (4)
- Median nerve
Proximal row of carpals:
Scaphoid, Lunate, Triquetrum, Pisiform
Distal Row of carpals:
Trapezuim, Trapezoid, Capitate, Hamate
Phalanges Parts
Distal, Middle and Proximal
Metacarpal parts
head, shart and base
(head is by the base of the phalanges
Superifical layer of the flexors
Pronator Teres
Flexor Carpi Radials
Palmaris Longus
Flexor Carpi Ulnaris
Pronator Teres origin
Coronoid Process of Ulna
Medial epicondly of humerus
Pronator Teres insertion
lateral surface of the radius
Pronator teres innervation
Median Nerve
Pronator teres action
pronates and flexes forearm
Flexor Carpi Radialis origin
Medial epicondyle of the humerus
Flexor carpi radialis insertion
base of 2nd metacarpal
flexor carpi radialis innervation
median nerve
flexor carpi radialis action
flexes and abducts the wrist
palmaris longus origin
medial epicondyle of the humerus
-not everyone has this muscle
Palmaris longus insertion
Palmar aponeurosis
Palmaris longus innervation
Median Nerve
Palmaris longus action
flexes hand at wrist
Intermediate layer of the flexors
- anterior side
- flexor digitorum superficials
Flexor Digitorum Superficials Origin
Medial Epicondyle of humerus and coronoid process of ulna
Flexor Digitorum Superficial Insertion
Shafts of middle phalanges of medial four digits
Flexor Digitorum Superficials innervation
Median Nerve
Flexor Digitorum Supericials action
Flexes wrist joint
Deep layer of the flexors
Flexor digitorum profundus
Flexor Pollicus Longus
Pronator Quadratus
Flexor Digitorum profundus origin
Promixal three quarters of medial surface of ulna and interosseous membrane
Flexor Digitorum profundus insertion
bases of the distal phalanges of 2nd, 3rd, 4th and 5th digit
Flexor Digitorum profundus innervation
Two parts:
Medial part: Ulnar Nerve
Lateral part: Median Nerve
Flexor Digitorum profundus action
- flexes wrist joint
- flexes distal interphalangeal joints of digit 2.3.4.5
Flexor Pollicis longus origin
anterior surface of radius and interosseous membrane
Flexor Pollicis longus insertion
base of distal phalanx of thumb
Flexor Pollicis longus innervaton
anterior interosseous nerve from medial nerve
Flexor Pollicis longus action
- flexes wrist
- flexes metacarpophalangeal and interpharangeal joint of thumb
Pronator quadratus origin
distal quarter of anterior surface of ulna
pronator quadratus insertion
distal quarter of anterior surface of radius
Pronator quadratus innervation
anterior interosseous nerve from medial nerve
pronator quadratus action
pronates the forearm, deep fibers bind radius and ulna together
Flexor carpi ulnaris origin
Olecranion and medial border of the ulna
Flexor carpi ulnaris insertion
Pisiform
Hook of the hamate
5th metacarpal
Flexor carpi ulnaris innervation
Ulnar nerve
Flexor carpi ulnaris action
Ulnar deviation
Flexes the wrist
