Elbow A Flashcards
What boney structure resists valgus stress at the elbow
radial head
the radius head is __________ on a _________ capitulum (humerus)
Concave radius on convex humerus
What is the functional ROM for the elbow
30-130
What is the capsular pattern of the elbow
Flexion lost before extension
What is the open packed position of the humero-ulnar joint
70 flexion, 10 supination
What is the close packed position of the humero-ulnar joint
full ext + full supination
What is a normal carrying angle?
males: 11-14
Females: 13-16
Varus deformities of the elbow indicate what?
potential fracture (gunstock deformity)
What is the open packed position of the humero-radial joint
full extension + full supination
what is the close packed position of the humero-radial joint
90 degrees flexion + 5 supination
What is the open packed position of the proximal radio-ulnar joint
70 flexion and 35 supination
What forms 80% of the articular surface of the proximal radio-ulnar joint
annular ligament
What is the open packed position of the distal radio-ulnar?
close packed?
open packed: 10 supination
close packed: 5 supination
how does the elbow joint capsule respond to injury
does not response well, will form thick scar tissue
these patients need to get moving ASAP
bc everything shares the same joint capsule, when one joint is affected they all are!
What is the strongest and stiffest elbow ligament
the anterior band of the UCL
When is the anterior band of the UCL taut
When is the LCL taut?
taut throughout motion
taut in full supination
The cubital tunnel has _________ volume in extension
_______ in full elbow fleixon
increased volume in extension
decreased volume in flexion
The Anterior interosseous nerve comes from what
Median N
The posterior interosseus nerve comes from what
Radial N
What is considered functional pronation/supination?
50/50
flex/ext and pron/sup are _________(relationship)
interdependent, if one is limited, the other will be too
T or F: The anterior portion of the UCL resists both valgus and varus stress
T
Tricep nerve:
Bicep/Brachialis nerve:
Radial
Musculocutaneous
Supinator innervation:
Radial PIN C5-C6
Pronator Quadratus Innervation:
Median AIN C8 T1
Pronator Teres and Flexor Carpi Radialis Innervation:
Median C6-C7
Extensor Carpi Radialis Longus innervation
Radial
ECRB innervation innervation
Radial PIN C7-C8
Extensor Carpi Ulnaris innervation
Radial PIN C7 C8
Abductor and extensor pollicus longus innervation
Radial PIN C7 C8
Extensor Digitorum and Extensor Indicis innervation
Radial PIN C7-C8
EDM innervation
Radial PIN c7 c8
Flexor digitorum superficialis innervation
median C7 C8 T1
FDP innervation
Digit 4-5: Ulnar
Digit 2-3: Median
What are the contents of the cubital fossa?
distal biceps tendon,
median n
brachial artery
radial n.,
medial cubital cutaneous vein
Borders of the cubital tunnel:
Lateral – brachioradialis, ECRL
Medial – PT
Proximal – imaginary line that passes through humeral condyles
Floor – brachialis
Medial elbow tendinopathy can cause neuritis of what nerve?
What would be weak?
Median
flexors and pronators
