section 8 Flashcards
(23 cards)
Elbow joint complex consists of
BONES- humerus ulna radius JOINTS- humeroulnar humeroradial radialulnar LIGAMENTS- medial collateral lateral collateral annular
what joint is the humeroulnar joint
ginglymus/hinge one degree of freedom
humeroulnar closed pack position
elbow extended and forearm supinated
humeroulnar open pack position
elbow flexed 70 degrees and forearm supinated 10 degrees
ulnar collateral ligament
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what type of joint is the humeroradial joint
enarthrodial/ball and socket 3 degrees of freedom
humeroradial closed pack position
elbox 90 degree flexed and rearm supinated 5 degrees
humeroradial open pack position
elbow fully extended and forearm fully supinated
radial collateral ligament
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what type of joint is the radioulnar joint
trochoidal/pivot one degree of freedom
radioulnar closed pack position
elbow fully extended and forearm supinated 5 degrees
radioulnar open pack position
elbow flexed 70 degrees and forearm supinated 35 degrees
annular ligament
page 74 STUDY THIS
interosseous membrane
attaches to interosseous crests of radius and ulna to stabilize and provide attachment for muscles. Also helps to spread forces out on the bones.
humeroulnar joint movements
flexion and extension
radioulnar joint movements
supination and pronation
Radial nerve innervates
B.E.A.S.T. Brachioradialis Extensors Anconeus, abductor polices longus Supinator Triceps
Median nerve innervates
all the anterior forearm muscles
ulnar nerve innervates
all of the intrinsic muscles of hand
carrying angle
formed by intersection of two lines: one through long axis of humerus and one through long axis of ulna. This exists because the medial lip of the trochlea extends further distally than does the lateral lip of the trochlea.
cubitus valgus
lateral former deviation beyond normal cubist carrying angle of 15 degrees
cubitus varus
medial forearm deviation to any degree beyond neutral.
cubitus recurvatum
backward or reverse bending of the elbow beyond straight position.