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Upper Limb Osteology
Rinaldi 1/26/11 lecture
95
Anatomy
Undergraduate 4
01/27/2011

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Term
function
Definition
morphology reflects _____
Term
increased mineral content
better(more re-enforced) muscle attachment.
Definition
people who are active at a young age(exercise) show what differences in bone structure? (2)
Term
when the long bones set/fuse ~age 31
Definition
at what age (when) is the potential to modify the skeleton lost?
Term
24
Definition
at what age does the humerus epiphyses fuse?
Term
clavicle, age 31
Definition
at what age does the last fused bone fuse, and what bone is it?
Term
1. cover joint surfaces
2. absorb shock
3. provide relatively frictionless surface
Definition
what are the 3 functions of hyaline cartilage in (synovial) joints?
Term
cracking, chipping, wearing of cartilage,
uncovered bone(which is very sensitive) or cartilage spurs lodged in the joint
Definition
what results when articular cartilage degenerates with age? and why does this cause pain?
Term
the patient may have been arthritic
Definition
what does an unsmoothe surface on the top of a bone (post mortum for example)
Term
outer fibrous capsule, synovial membrane, synovial cavity filled with fluid, articular cartilage, articular capsule (sometimes articular disc too)
Definition
what are the components of a synovial joint?
Term
synovial membrane
Definition
what creates synovial fluid?
Term
similar to blood plasma, with the addition of hyaluronic acid which makes is viscous (oil-like)
Definition
what is synovial fluid?
Term
provides nutrients to articular cartilage, and lubricates the joint to reduce friction
Definition
list the two main functions of synovial fluid
Term
bursae
Definition
sacs of synovial fluid that are located outside of the joint
Term
intrinsic: form part of joint capsule or located inside joint.
extrinsic: ligaments located outside the joint capsule
Definition
intrinsic ligament, what is it? extrinsic?
Term
the end of a long bone, initially separated from the shaft (diaphysis) by a section of cartilage that eventually ossifies so that the two portions fuse together
Definition
what is an epiphyses?
Term
1. they move more due to their high metabolic rate(warm blooded)
2. they move quicker
3. they grow into adult size quickly
Definition
what are 3 reasons why mammals and birds have an epiphyseal plate/epiphysis?
Term
epiphysis
Definition
allows for precision during growth process, hard precise joint surface
Term
synovial fluid
Definition
what is contained in the synovial cavity?
Term
epiphyseal plate
Definition
lengthening of the diaphesis occurs here
Term
epiphyses
Definition
grows initially on all surfaces of bones, subsequently only grows on surfaces facing the epiphyseal plate
Term
epiphyses
Definition
what are the secondary centers of growth in bones
Term
diaphyses
Definition
what is another name for the shaft of the bone
Term
when the fusion of the epiphyseal plate occurs
Definition
when does long bone growth end?
Term
epiphyses
Definition
what bone structure allows for rapid complex movements?
Term
dislocated (muscles can snap them)
Definition
part of the clinical significance of epiphyses is that they can be _______ prior to fusion
Term
made from fibrocartilage, allows a good range of movement and allows the bone surface to adapt to movement

(This separation of the cavity space allows for separate movements to occur in each space.
The presence of an articular disk also permits a more even distribution of forces between the articulating surfaces of bones, increases the stability of the joint, and aids in directing the flow of synovial fluid to areas of the articular cartilage that experience the most friction.)
Definition
what is the function of the articular disc? and what is it made from?
Term
sternoclavicular joint (it is also supported by muscles)
Definition
what is the only bony joint connecting the pectoral girdle to the axial skeleton?
Term
a conceptual joint between the scapula and axial skeleton, maintained by muscles only
Definition
what is the scapulothoracic joint?
Term
S
Definition
shape of the clavicle
Term
you are viewing it from below (looking up from the feet to the head)
Definition
if you are looking at a right clavicle and the S is going the correct direction (not backwards) which side are you viewing it from?
Term
concave lateral, convex medial
Definition
the clavicle is _______ forward at the lateral end, and _______ forward at the medial end (concave/convex)
Term
1) as a strut
2) transmits shock from upper limb to axial skeleton
Definition
what are the 2 main functions of the clavicle?
Term
holds the upper limb out and away from the thoracic wall
Definition
what does the clavicle do as a "strut"
Term
manubrium and sternum
Definition
what does the clavicle articulate with at the medial end?
Term
acromioclavicular
Definition
what is the name of the joint at the lateral end of the clavicle?
Term
between the middle 2/3 and lateral 1/3
Definition
where are fractions common in the clavicle
Term
lateral fragment drops with the weight of the arm, because medial rotators are stronger than lateral rotators
Definition
what is the result of a fracture in the clavicle? why?
Term
pressure on a bone causes the bone to be resorbed. In other words the law that skeletal transformation is dependent on the exertion of pressures from outside the animal.
Definition
Wolff's law states ______?
Term
2-7
Definition
what ribs does the scapula overly?
Term
anterior
Definition
what side of the body is the subscapular fossa on?
Term
posterior
Definition
what side of the body is the supraspinous fossa of the scapula?
Term
posterior
Definition
what side of the body is the infraspinous fossa on?
Term
posterior
Definition
what side of the body is the spine of the scapula on?
Term
acromion process
Definition
what is the expanded lateral end of the scapular spine called?
Term
anterior
Definition
what side of the body is the coracoid process of the scapula on?
Term
the joint between the scapula and the head of the humerus
Definition
what forms the glenoid cavity
Term
[image]
Definition
[image]
Term
infraglenoid tubercle
Definition
what is a muscle scar for the attachment of the long head of the triceps?
Term
[image]
Definition
where is the anatomical neck of the humerus?
Term
greater and lesser tubercle
Definition
where on the humerus is the site of rotator cuff attachment?
Term
more lateral
Definition
is the greater tubercle more lateral or more medial than the lesser tubercle?
Term
[image]
Definition
where is the deltoid tuberosity of the humerus?
Term
[image]
Definition
know this shit!
Term
[image]
Definition
where is the radial groove of the humerus?
Term
capitulum, lateral
Definition
what is the surface of articulation with the radius on the humerus? is it located more lateral or medial in anatomical position?
Term
trochlea
Definition
what part of the humerus associates with the ulna?
Term
it is a common fracture site resulting from falling and catching oneself with the elbow Abducted
Definition
what is the clinical significance of the surgical neck of the humerus
Term
medial epicondyle
Definition
where do the forearm flexors attach to the humerus?
Term
supinated (on back with palms up, thumbs out) cadavers have pronated wrists (palms down)
Definition
is the anatomical position, and how do cadavers vary from this?
Term
posterior
Definition
is the radial groove on the anterior, lateral, or posterior side?
Term
anterior, more laterally
Definition
is the deltoid tuberosity on the anterior, lateral, or posterior side?
Term
you cannot extend the wrist and fingers
Definition
what are the clinical findings with wrist drop?
Term
wrist drop
Definition
what can damage to the radial nerve cause
Term
radial nerve, if trapped & damaged can cause wrist drop
Definition
what nerve do you worry about when the arm breaks?
Term
pinky
Definition
what finger is closest to the styloid process of the ulna?
Term
none
Definition
what bones does the ulna articulate with in the wrist?
Term
proximal part of the ulna (sits on top) where the triceps attach
Definition
where/what is the olecranon?
Term
[image]
Definition
where is the coronoid process?
Term
hinge joint
Definition
what kind of joint is between the ulna and humerus?
Term
[image]
Definition
where is the tuberosity of the ulna?
Term
brachialis, it is a powerful elbow flexor
Definition
what attaches to the tuberosity of the ulna?
Term
scaphoid and lunate
Definition
what wrist bones does the radius articulate with?
Term
radius
Definition
which styloid process extends further?
Term
thumb
Definition
what finger is the styloid process of the radius nearby?
Term
a fracture
Definition
if the sytloid process of the radius shifts proximally, what could this indicate?
Term
proximal, anterior side of radius
Definition
where is the radial tuberosity?
Term
rotation during pronation and supination
anterior posterior movement during elbow flexion and extension
Definition
what are the movements of the radius?
Term
subluxing is pulling a joint apart, dislocating is pulling a joint apart and moving it so the bones are not aligned
Definition
what is the difference between subluxing and dislocating?
Term
their radius is pulled down out of the annular ligament (subluxed) when the child's arm is pronated
Definition
what happens to a child antomically when they get Nurse maid's elbow?
Term
A) humerus, B) olecranon fossa, C) lateral epicondyle, D) capitulum, E) capitulum-radial joint, F) radial head, G) neck of radius, H) radial tuberosity, I) coronoid, J) medial trochlea, K) medial epicondyle. On the right, a coronal CT slice demonstrates the olecranon process of the ulna within the olecranon fossa of the distal humerus (M) and the coronoid process articulating on the trochlear (L).
Definition
[image]
Term
sesamoid, meaning it is embedded in tendon for mechanical advantage
Definition
what type of bone is the pisiform bone
Term
hammate
Definition
what hand bone has a hook?
Term
trapzium
Definition
what bone is right next to the thumb?
Term
agonist
Definition
muscle that does the intended movement
Term
antagonist
Definition
muscle that lengthens when the other muscle contracts to help control movement
Term
when a muscle is injured, the other muscle causes the arm, for example, to curl up due to muscle tone (continuous contraction in the absence of a stimulus
Definition
what is contracture?
Term
they hold one part of a joint in place to help stabilize it
Definition
what are fixators/stabilizers
Term
trapezium, trapezoid, capitate
Definition
what bones does the second metacarple articulate with?
Term
metacarples 2,3,4
Definition
what bones does the capitate articulate with?
Term
the second one
Definition
which metacarple is the largest?
Term
capitate
Definition
which wrist bone is the largest?
Term
{imagehttp://t3.gstatic.com/images?q=tbn:ANd9GcRlZLYjBV7nKVCu4OppT3E7SZjK74pfIpIT8KujKRkxXhqtPeOSuQ|center}
Definition
label this image (the wrist bones)
Term
base is more proximal, head is more distal
Definition
is the base or the head of a metacarple more proximal?
Term
phalynx
Definition
what is a single phalanges called?
Term
3 (proximal, middle, distal), thumb has proximal and distal
Definition
how many phalanges do digets II-V have? digit I?
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