lecture 10: elbow and the forearm Flashcards
what is the normal caring angle of men and females
10- 15˚
what is considered to be cubits valgus
greater than 15
what is considered cubical varus
less than 5
what is it called for sun stock deformity
cubical varus
what type of membrane is the synovial membrane of elbow
fibrous membrane
are there fat pads in the fossae of the synovial membrane of elbow
yes
what does the anular ligament of radius do
stable the radius during pronation and supination
what other ligament does the anular ligament of radius blend with
the radial collateral ligament
what are the collateral ligaments of the elbow
radial collateral ligament and ulnar collateral ligament
what does the radial collateral ligament resist
cubical varus
what does the ulnar collateral ligament resist
cubitial valgus
during the tommy john. surgery where do they get the autograph from
palmaris longus or plantar is
the collateral ligaments also limit
addiction and abduction
what is it called that is a ulnar fracture with dislocation of radial head
monteggia
what is galleazzi
radial fx with dislocation of distal radioulnar joint
the anastomotic network of vessels are derived firm what
collateral and recurrent branches of the brachial, profundity brachii, radial and ulnar arteries
what does recurrent mean
arteries that curve back in and help
what causes the angle in humerus
trochlea
what is the main joint for flexors and extensors
humeroulnar joint
where is the humeroulnar joint
trochlea of distal humerus
the medial portion of the trochlea extends more
distally
the humeroulnar joint is divided by what
the trochlear ridge which tracks movement
what makes up the humeroradial joint
capitulum and radial head
what makes up the elbow proper
humeroradial joint and humeroulnar joint
what type of joint is the humeroradial joint
synovial , hinge joint
how many degrees of freedom does the humeroradial joint have
1
what is the DOF of the humeroradial joint
flexion and extension
where does the proximal radioulnar joint articulate
at the radial head and the radial notch of the ulna
what type of joint is the proximal radioulnar joint
synovial , pivot joint
how many DOF does the proximal radioulnar joint have
1
what is the DOF of the proximal radioulnar joint
supinationa nd pronation
what is the medial border of the cubical fossa
pronator teres
what is the lateral border of the cubical fossa
brachioradialis
what is the floor of the cubical fossa
brachialis and supinator
what runs thru the cubitial fossa from lateral to medial
biceps tendon
brachial artery
median nerve
what vein do nurses take blood out of a
median cubical vein
what veins join together at the cubitial fossa
the basilic and cephalon veins
what myotme is arm flexion
C6
what myotome is wrist flexion
C7
what myotome is wrist extension
C6
what myotome is arm extension
C7
the radioulnar articulate at 2 places
proximal radioulnar joint
distal radioulnar joint
what type of joint is the proximal radioulnar and
distal radioulnar joint
synovial joint
during pronation , in the wlbow the radial head spins on the
capitulum of the humerus
also during pronation the radial head slides on the
radial notch of the ulna
during pronation when the radial head slides on the radial notch it does what to the ligaments
adds stress to the joint ligaments and anular ligament
during pronation, towards the wrist the ulnar notch of the radius slides
anteriorly over the convex surface of the head of the ulna
during pronation there is what type of movement of the ulna
very litttle movement
what are the supinator muscles of the forearm
supinator and biceps brachii
what are the pronator muscles of the forearm muscles
pornator teres and pronator quadratus
what type are the ligaments in the arm f
fibrous
the ligaments in the arm hold what together
radius and ulna
the ligaments in the arm increase what
the surface areas for attachments
wha type of tigers transfer axial forces from distal radius to proximal ulna
collagen fibers
what ligament goes over the radial head
anular ligament
what ligament goes from the ulna to the radial neck
quadrate ligament
what ligament is inside the annular ligament
the quadrate ligament
where does the oblique cord go
below the radial notch of ulna to the radial tuberosiuty
what does the oblique cord limit
limits distal (inferior) motion of radius
what is “pulled elbow” associated with
oblique cord
what joint helps with pronation and supination
distal radioulnar joint
what is the distal radioulnar joint
ulna articulated with the ulnar notch of the radius
the distal radioulnar joint is wha type of disc
articulate
what type of joint is the distal radioulnar joint
synovial pivot type of joint
what is the triangular fibro cartilage complex
a triangular disc
what does the TFCC bind
the ends of the radius and ulna
what does the TFCC connect
the anterior and posterior radioulnar ligaments
where does the TFCC disc attach
ulnar styloid process