Kinese Chapter 6
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The ulna is much larger ___ than the raduis
____ and ____ serve as proximal attachments for the mms that flex and extend the elbow
And the Ulna dna Radius serve as distal attachments for the same ___
- scapula and humerus
____ ____ and ____ serve as proximal attachments for mms that pronate and supinate the radioulnar joints
Distal attachments of the radioulnar joint mms are located on the ___
scapula radius and ulna
what are four bony landmarks of the radioulnar joint????
- Coronoid Process Radial Tuberosity Olecranon Process and Medial Condyliod Ridge
What are the 3 key bony landmarks for the wrist and hand???
- Medial epicondyle lateral epicondyle
- lateral supracondylar ridge
What kind of joint is the elbow and what kind of motions does it allow?
what are the interrelated joints??
The elbow is a Hinge Joint and it allows flex and extend
humeroulnar and radiohumeral joints!
Elbow motions are movement between articulat surfaces of humerus and ___?
Specifically ___ trochlear fitting into ___ trochlear notch
humeral and ulna
The radial head had ___ contact with capitulum of humerus?
As elbow reaches full extension the olecranon ___ is received by the olecranon... and this increases stability
process received by fossa
As elbow flexes ___ degrees or more there is more side to side ___
Stability in flexion is dependent on ___ and ___
Ulnar collateral ligament and Radial '' ''
UCL prevents injury from extreme ____
RCl provides ___ stability and is rare injury
____ ligament provides a ___ effect around radial head for stabilty
Annular and sling effect
Elbow moves from __ degrees of extension to __ degrees of flexion
0 to 145-150
what type of joint is the radioulnar joint?
what ligament maintains radial head in its joint??
pivot joint and annular ligament
radial ___ rotates around proximal ___?
distal ___ rotates around ___ ulna?
Radial head and proximal ulna
distal radius and distal ulna
Radioulnar Joint can supinate __ degrees from neutral as well as __ degrees pronation
Where is the radioulnar joint located?
there is substantial what here?
Between the shafts of the radius and ulna held together by proximal and distal articulations... syndesmosis cause its and interroseous membrane
rotary motion between the bones
How is there synergy between the GH, elbow, and radioulnar joints???
GH and elbow mms contract and assist in effectiveness of radioulnar movements
Ex: tightening screw is radioulnar sup but we ext rotate gh and elbow to aid this movement
Def of Pro and Sup??
Pro is internal rotary movement of radius resulting in palm up to palm down position
what are the elbow flexors???
- Biceps brachii
what are the elbow extensors??
assistance from the aconeus
What are the radioulnar pronators???
what are the radioulnar supinators?
tennis elbow is ___ epicondylitis and usually involves extensor digitorum mm near its origin on lateral epicondyle
Golfers is the opposite and associated with medial wrist flexor and pronator group
-both r mms that cross elbow but act on wrist/hand
tennis is lateral
The carrying/cubital angle is arm ext. at anatomical and the ___ axes of the upper arm and forearm form a lateral/___ angle at the elbow joint
What does valgus mean?
Since the ___ extends more distally than the capitulum the axis of flexion and extension of the elbow is not fully ___ to the shaft of the humerus...
what does the forearm do in relation to humerus when it is supinated when elbow extended?
- valgus means away from the midline
- trochlea and perpendicular
- the forearm deviates laterally
why do females have a more pronounced carrying angle?
what are the normal angles for men and women?
- females have less broad shoulders
- men is 5 and women are 10 to 15 degrees
where does the carrying angle allow the elbow to fit closely into?
what is the purpose of the carrying angle?
- the elbow firts into the depression at the waist immediately superior to the iliac crest
- serves to keep held object away from the body
what is a nursemaid elbow/pulled elbow?
what causes it? pain complaints? where is pain? age range? there is usually a tear in the attachement of what?
- dislocation of the elbow/subluxation of the radial head. caused by tugging of pronated arm or swinging child. little complaint of pain and if there is: in distal forearm.
- 1 to 3 and tear in attach. of annular ligament
what are the anterior mms and what actions do they primarily perform?
- the perfom pro. and flex
- 2ps and BBB
- pronator teres pronator quadratus
- brachialis biceps brachi brachioradialis
what are the posterior mms and what actions are they involved with?
- they are concerned with extension and supination
- "SAT" supinator aconeous triceps brachi
what are the actions of the biceps brachii and the O and I for it??
- flex and suppination
- Long Head O: supraglenoid tubercle above superior lip of glenoid fossa
- Short Head O: coracoid process of scap and upper lip glenoid fossa in conjunction with prox attach of coracobrachialis
- I: tuberosity of radius and bicipital aponeurosis
what are the actions and the O and I of the brachialis?
- True flexion!
- O: distal half anterior humerus
- I: coronoid process of ulna
what are the actions of the Brachioradialis? what are the O and I? it is a powerhouse most effective when?
It is part of what wad with what other two mms?
- Flex of elbow sup from pro to neutral and pro from sup to neutral... best in Neutral!
- O: lateral supracondylar ridge of humerus
- I: styloid process of radius
- Mobile wad of henry.. The extensor carpi radialis brevis and longus
what are the actions of the triceps brachii and what is the O and I for it?
- O: upper posterior humerus
- I: olecranon process of ulna
What are the acitons of the aconeus and what are the O and I for it as well?
- Elbow extension
- O: Posterior lateral condyle of humerus
- I: posterior upper ulna and olecranon
what are the agonists of elbow flexion?? and Extension??
flex: BBB brachialis brachioradialis and b. brachii
Ext: triceps brachii and aconeus?
what are the agonists involved in radioulnar pronation?? Supination??
Pro: pronator teres and quadratus, brachioradialis
Sup: supinator brachioradialis B. Brachii
where is the cubital fossa located? what line is the base defined by? what structures pass through it?
triangular space bordered by brachioradialis laterally and pronator teres medially. An imaginary line that runs bw epicondyles of humerus from its lateral to medial borders. the biceps tendon, brachial artery, median and musculotaneous nerve pass through this!
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