MSK - Upper Limb 2 Flashcards
what are the three parts of the hand?
phalanges
metacarpals
carpals
label the parts of the ulna
the suppinator attatches to the suppinator crest
anconeus attatches to roughening for acconeus
Ulna bone
1) Olecranon process
2) Trochlea notch (hosts trochlea of humerus)
3) Radial notch
4) Coronoid Process
5) Ulnar tuberosity
label what you can of the radius
What does the ulna articulate with?
What does the radius articulate with?
Trochlea of humerus - it helps you flex and extend your arm
Head of radius
Distal end of radius
Capitulum- it helps you rotate your arm
Radial notch of ulna
Distally articulates with head of ulna and carpal bones (scaphoid and lunate articular facets)
Which wrist bone?
Pisiform
what are the diff types of joints
pivot
ball and socket
hinge
condyloid
plane
saddle
What type of joint is the wrist joint?
Condyloid (Ellipsoid) synovial joint
Which carpal bone is most commonly fractured? - falling on hand
scaphoid bone - which arti ulates with the radius -
what movements does the ulnar and radius allow?
pronation
supination
label the different wrist joints and articular disk
distal radioulnar = pivot joint
what movements are allowed by the wrist joints and what is it
wrist joint = radiocarpal - is a condyloid joint
circumduction is when all 4 work together
What type of joint is the metacarpophalangeal joint?
joint between a phalanx and metacarpal is called the metacarpal phalangeal joint and it is a condyloid joint
What type of joint is formed between the carpal bones and metacarpals? AND THUMB?
Carpometacarpal plane synovial APART FROM THUMB = SADDLE
What joint is formed between the radius and carpal bones?
What is this joint also called?
Radiocarpal condyloid joint
Wrist joint
What are the 3 divisions of the phalanges?
proximal, middle and distal
What are the fingers called? thumb?
digits and the thumb is called the pollex
What attaches at the supinator crest of the ulnar?
supinator muscle
What is the roughening for aneconeus?
attachment of the aneconeus muscle
What is the ulnar styloid process?
pointed projection on lateral surface of ulnar head which allows for attachment of different ligaments
Which other bones does the radius articulate with?
- facet for articulation with the scaphoid bone
- facet for articulation with lunate bone
What happens at the radial tuberosity?
insertion of ligaments which support the elbow
How are the ulnar and the radius reinforced and held together?
interosseous membrane
What is the anular ligament?
strong fibers that completely encircle the head of the radius
- holds head of radius within the radial notch of the ulna
What is proximal to the anular ligament?
radioulnar joint (pivot joint)
What does the articular disc do?
fibrocartilage which divides joint into upper and lower compartments reinforcing the wrist joint with the distal radioulnar joint